[GP15 Particulate Thorium and Protactinium Leg 1] - Size-fractionated particulate thorium and protactinium isotopes in seawater from Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from September to October 2018 (US GEOTRACES Pacific Meridional Transect (GP15))

This dataset contains concentrations of size-fractionated particulate thorium and protactinium isotopes (Th-232, Th-230, Pa-231) in seawater collected during the U.S. GEOTRACES Pacific Meridional Transect GP15; Alaska to Tahiti) on the Roger Revelle (RR1814 and RR1815) from 18 September – 24 November 2018. This is compiled data produced by three laboratories with the following associations: Lamont-Doherty Earth Observatory of Columbia University (LDEO), the University of Southern Mississippi (USM), and the University of Minnesota (UMN). A report will be submitted for review by the International GEOTRACES Standards and Intercalibration (S&I) Committee. This dataset contains data from Leg 1 of the expedition (RR1814). Data from leg 2 are available in a separate BCO-DMO dataset.

cdm_data_type = Other
VARIABLES:
Cruise_ID (unitless)
Station_ID (unitless)
Cast_ID (unitless)
Event_ID (unitless)
Gear_ID (unitless)
Start_Date_UTC (unitless)
Start_Time_UTC (unitless)
time (Start_iso_datetime_utc, seconds since 1970-01-01T00:00:00Z)
latitude (Start_latitude, degrees_north)
longitude (Start_longitude, degrees_east)
Sample_ID (unitless)
Lab_ID_SPT (unitless)
Lab_ID_LPT (unitless)
depth (Sample_depth, m)
Sample_Depth_Flag (unitless)
Th_232_SPT_CONC_PUMP_zuir1n (picomoles per kilogram (pmol/kg))
SD1_Th_232_SPT_CONC_PUMP_zuir1n (picomoles per kilogram (pmol/kg))
Flag_Th_232_SPT_CONC_PUMP_zuir1n (unitless)
Th_230_SPT_CONC_PUMP_jit90a (micro-Becquerel per kilogram (uBq/kg))
... (38 more variables)


[GP15 Particulate Thorium and Protactinium Leg 2] - Size-fractionated particulate thorium and protactinium isotopes in seawater from Leg 2 (Hilo, HI to Papeete, French Polynesia) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1815) on R/V Roger Revelle from Oct-Nov 2018 (US GEOTRACES Pacific Meridional Transect (GP15))

This dataset contains concentrations of size-fractionated particulate thorium and protactinium isotopes (Th-232, Th-230, Pa-231) in seawater collected during the U.S. GEOTRACES Pacific Meridional Transect GP15; Alaska to Tahiti) on the Roger Revelle (RR1814 and RR1815) from 18 September – 24 November 2018. This is compiled data produced by three laboratories with the following associations: Lamont-Doherty Earth Observatory of Columbia University (LDEO), the University of Southern Mississippi (USM) and the University of Minnesota (UMN). A report will be submitted for review by the International GEOTRACES Standards and Intercalibration (S&I) Committee. This dataset contains data from Leg 2 of the expedition (RR1815). Data from leg 1 are available in a separate BCO-DMO dataset.

cdm_data_type = Other
VARIABLES:
Cruise_ID (unitless)
Station_ID (unitless)
Cast_ID (unitless)
Event_ID (unitless)
Gear_ID (unitless)
Start_Date_UTC (unitless)
Start_Time_UTC (unitless)
time (Start_iso_datetime_utc, seconds since 1970-01-01T00:00:00Z)
latitude (Start_latitude, degrees_north)
longitude (Start_longitude, degrees_east)
Sample_ID (unitless)
Lab_ID_SPT (unitless)
Lab_ID_LPT (unitless)
depth (Sample_depth, m)
Sample_Depth_Flag (unitless)
Th_232_SPT_CONC_PUMP_lpmi1m (picomoles per kilogram (pmol/kg))
SD1_Th_232_SPT_CONC_PUMP_lpmi1m (picomoles per kilogram (pmol/kg))
Flag_Th_232_SPT_CONC_PUMP_lpmi1m (unitless)
Th_230_SPT_CONC_PUMP_29jynq (micro-Becquerel per kilogram (uBq/kg))
... (38 more variables)


[GP15 Pb and Pb Isotopes Leg 1] - Lead (Pb) concentrations and Pb isotope ratios (206Pb/207Pb, 208Pb/207Pb, 206Pb/204Pb) from Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from September to October 2018 (US GEOTRACES Pacific Meridional Transect (GP15))

During September 23 to November 22, 2018, the R/V Roger Revelle completed a trace element (and their isotopes) hydrographic section along ~152° West from 56° North to 20° South (GEOTRACES GP15). Full water column trace metal clean samples were obtained with the U.S. GEOTRACES Carousel (GTC) composed of 24 12-liter trace metal clean GO-Flow sampling systems mounted on a trace metal free powder-coated titanium rosette system. Three of the stations had lead (Pb) concentrations determined at Massachusetts Institute of Technology (MIT) by isotope dilution quadrupole inductively coupled plasma mass spectrometry (ICPMS) for intercalibration with the Texas A&M (TAMU) lab of Jessica Fitzsimmons who analyzed all of the cruise stations. The rest of the full- and super-stations were analyzed at MIT for Pb isotope ratios (206Pb/207Pb, 208Pb/207Pb, 206Pb/204Pb). These data are collected to document the penetration of atmosphericly-transported anthropogenic Pb into the ocean and its subsequent dispersion by circulation and chemical interactions between sinking particles and Pb dissolved in solution. Shuo Jiang, Nathan Lanning, and Edward Boyle performed the extractions and the ICPMS analyses. This dataset includes data from Leg 1 of the cruise, RR1814.

cdm_data_type = Other
VARIABLES:
Station_ID (unitless)
Event_ID (unitless)
time (Start_iso_datetime_utc, seconds since 1970-01-01T00:00:00Z)
End_ISO_DateTime_UTC (seconds since 1970-01-01T00:00:00Z)
latitude (Start_latitude, degrees_north)
longitude (Start_longitude, degrees_east)
Sample_ID (unitless)
depth (Sample_depth, m)
Pb_206_207_D_RATIO_BOTTLE_h0hu59 (unitless)
SD2_Pb_206_207_D_RATIO_BOTTLE_h0hu59 (unitless)
Flag_Pb_206_207_D_RATIO_BOTTLE_h0hu59 (unitless)
Pb_208_207_D_RATIO_BOTTLE_o5msvl (unitless)
SD1_Pb_208_207_D_RATIO_BOTTLE_o5msvl (unitless)
Flag_Pb_208_207_D_RATIO_BOTTLE_o5msvl (unitless)
... (18 more variables)


[GP15 Pb and Pb Isotopes Leg 2] - Lead (Pb) concentrations and Pb isotope ratios (206Pb/207Pb, 208Pb/207Pb, 206Pb/204Pb) from Leg 2 (Hilo, HI to Papeete, French Polynesia) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1815) on R/V Roger Revelle from Oct-Nov 2018 (US GEOTRACES Pacific Meridional Transect (GP15))

During September 23 to November 22, 2018, the R/V Roger Revelle completed a trace element (and their isotopes) hydrographic section along ~152° West from 56° North to 20° South (GEOTRACES GP15). Full water column trace metal clean samples were obtained with the U.S. GEOTRACES Carousel (GTC) composed of 24 12-liter trace metal clean GO-Flow sampling systems mounted on a trace metal free powder-coated titanium rosette system. Three of the stations had lead (Pb) concentrations determined at Massachusetts Institute of Technology (MIT) by isotope dilution quadrupole inductively coupled plasma mass spectrometry (ICPMS) for intercalibration with the Texas A&M (TAMU) lab of Jessica Fitzsimmons who analyzed all of the cruise stations. The rest of the full- and super-stations were analyzed at MIT for Pb isotope ratios (206Pb/207Pb, 208Pb/207Pb, 206Pb/204Pb). These data are collected to document the penetration of atmosphericly-transported anthropogenic Pb into the ocean and its subsequent dispersion by circulation and chemical interactions between sinking particles and Pb dissolved in solution. Shuo Jiang, Nathan Lanning, and Edward Boyle performed the extractions and the ICPMS analyses. This dataset includes data from Leg 2 of the cruise, RR1815.

cdm_data_type = Other
VARIABLES:
Station_ID (unitless)
Event_ID (unitless)
time (Start_iso_datetime_utc, seconds since 1970-01-01T00:00:00Z)
End_ISO_DateTime_UTC (seconds since 1970-01-01T00:00:00Z)
latitude (Start_latitude, degrees_north)
longitude (Start_longitude, degrees_east)
Sample_ID (unitless)
depth (Sample_depth, m)
Pb_208_207_D_RATIO_FISH_dx6trs (unitless)
SD1_Pb_208_207_D_RATIO_FISH_dx6trs (unitless)
Flag_Pb_208_207_D_RATIO_FISH_dx6trs (unitless)
Pb_206_204_D_RATIO_FISH_xqphwk (unitless)
SD1_Pb_206_204_D_RATIO_FISH_xqphwk (unitless)
Flag_Pb_206_204_D_RATIO_FISH_xqphwk (unitless)
... (18 more variables)


[GP15 Water Column Dissolved 227Ac Leg 1] - Activity of actinium-227 from water samples collected on Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from September to October 2018 (US GEOTRACES Pacific Meridional Transect (GP15))

Actinium-227 (227Ac) was captured on commercial water filters impregnated with manganese dioxide (MnO2) and placed downstream of the filters in submersible pumps deployed on GEOTRACES expedition GP15, aboard R/V Roger Revelle, in collaboration with groups from Woods Hole Oceanographic Institution (WHOI) and University of South Carolina who measured radium isotopes on the same cartridges. The activity of 227Ac was measured using RaDeCC (Radium Delayed Coincidence Counter) and used to calculate the concentration of dissolved  227Ac along the transect by PI Douglas Hammond and graduate student Nathan Kemnitz. Data have been summarized and will be submitted in a publication to be submitted to JGR Oceans, along with a companion data set for 227Ac, 228Ra, and 210Pb in sediments. This dataset has been used to evaluate deep ocean solute transport. This dataset includes data from Leg 1 of the cruise (RR1814). Leg 2 data (RR1815) are available in a separate BCO-DMO dataset.

cdm_data_type = Other
VARIABLES:
Station_ID (unitless)
Event_ID (unitless)
Gear_ID (unitless)
time (Start_iso_datetime_utc, seconds since 1970-01-01T00:00:00Z)
Start_Date_UTC (unitless)
Start_Time_UTC (unitless)
End_ISO_DateTime_UTC (seconds since 1970-01-01T00:00:00Z)
End_Date_UTC (unitless)
End_Time_UTC (unitless)
latitude (Start_latitude, degrees_north)
longitude (Start_longitude, degrees_east)
Sample_ID (unitless)
depth (Sample_depth, m)
Ac_227_D_CONC_PUMP_lfvbby (micro becquerel per kilogram (uBq/kg))
SD1_Ac_227_D_CONC_PUMP_lfvbby (micro becquerel per kilogram (uBq/kg))
Flag_Ac_227_D_CONC_PUMP_lfvbby (unitless)
Pa231_uBq_kg (micro becquerel per kilogram (uBq/kg))
... (9 more variables)


[GP15 Water Column Dissolved 227Ac Leg 2] - Activity of actinium-227 from water samples collected on Leg 2 (Hilo, HI to Papeete, French Polynesia) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1815) on R/V Roger Revelle from Oct-Nov 2018 (US GEOTRACES Pacific Meridional Transect (GP15))

Actinium-227 (227Ac) was captured on commercial water filters impregnated with manganese dioxide (MnO2) and placed downstream of the filters in submersible pumps deployed on GEOTRACES expedition GP15, aboard R/V Roger Revelle, in collaboration with groups from Woods Hole Oceanographic Institution (WHOI) and University of South Carolina who measured radium isotopes on the same cartridges. The activity of 227Ac was measured using RaDeCC (Radium Delayed Coincidence Counter) and used to calculate the concentration of dissolved  227Ac along the transect by PI Douglas Hammond and graduate student Nathan Kemnitz. Data have been summarized and will be submitted in a publication to be submitted to JGR Oceans, along with a companion data set for 227Ac, 228Ra, and 210Pb in sediments. This dataset has been used to evaluate deep ocean solute transport. This dataset includes data from Leg 2 of the cruise (RR1815). Leg 1 data (RR1814) are available in a separate BCO-DMO dataset.

cdm_data_type = Other
VARIABLES:
Station_ID (unitless)
Event_ID (unitless)
Gear_ID (unitless)
time (Start_iso_datetime_utc, seconds since 1970-01-01T00:00:00Z)
Start_Date_UTC (unitless)
Start_Time_UTC (unitless)
End_ISO_DateTime_UTC (seconds since 1970-01-01T00:00:00Z)
End_Date_UTC (unitless)
End_Time_UTC (unitless)
latitude (Start_latitude, degrees_north)
longitude (Start_longitude, degrees_east)
Sample_ID (unitless)
depth (Sample_depth, m)
Ac_227_D_CONC_PUMP_rxwrrl (micro becquerel per kilogram (uBq/kg))
SD1_Ac_227_D_CONC_PUMP_rxwrrl (micro becquerel per kilogram (uBq/kg))
Flag_Ac_227_D_CONC_PUMP_rxwrrl (unitless)
Pa231_uBq_kg (micro becquerel per kilogram (uBq/kg))
... (9 more variables)


[GP16 Acetic Acid Leachable Trace Metals from Aerosols] - Acetic acid leachable trace metals from bulk aerosol samples collected during the US GEOTRACES EPZT section cruise (R/V Thomas G. Thompson TN303) in the Eastern Tropical Pacific from October to December 2013 (U.S. GEOTRACES East Pacific Zonal Transect)

Atmospheric input is important to the biogeochemical cycling of trace metals in the ocean. The fraction of aerosol trace metals that can potentially dissolve after deposition is of interest for improving knowledge of aerosol/surface ocean interactions. This dataset provides acetic acid leachable trace metal values from bulk aerosol from the Equatorial Pacific along the US GEOTRACES EPTZ transect (TN303) from Peru to Tahiti. This region is characterized as one of the lowest atmospheric deposition regimes in the ocean. Bulk aerosols were collected from the boundary layer (~15 m above sea level) using a high-volume aerosol sampler drawing approximately 1.2 cubic meters of air per minute over Whatman 41 ash-less filter discs. Despite low aerosol loadings, triplicate agreement for most samples was good for Al, Ti, V, Mn, Fe, and Cu. Away from the coast, Cd and Pb values in most samples were close to, or below detection limit. Acetic acid leaches were carried out with a combination of 25% acetic acid and a reducing agent. Leachable trace metal concentrations were determined at the University of Alaska Fairbanks by inductively coupled plasma mass spectrometry (Thermo Element-2) using external calibration curves. The aerosol trace metal fractional solubility was calculated as a percent of the total bulk aerosol data from the same cruise (https://www.bco-dmo.org/dataset/675632).

cdm_data_type = Other
VARIABLES:
Station_ID (unitless)
Start_Date_UTC (unitless)
Start_Time_UTC (unitless)
time (Start ISO Date Time UTC, seconds since 1970-01-01T00:00:00Z)
End_Date_UTC (unitless)
End_Time_UTC (unitless)
End_ISO_DateTime_UTC (End ISO Date Time UTC, unitless)
latitude (degrees_north)
longitude (degrees_east)
End_Latitude (Latitude, degrees North)
End_Longitude (Longitude, degrees East)
Event_ID (unitless)
Sample_ID (unitless)
... (26 more variables)


[GP16 Cast Events Summary Table] - Cast events summary table associated with the US GEOTRACES East Pacific Zonal Transect from the R/V Thomas G. Thompson TN303 cruise in the tropical Pacific from Peru to Tahiti during 2013 (U.S. GEOTRACES EPZT project) (U.S. GEOTRACES East Pacific Zonal Transect)

Cast events summary table associated with the US GEOTRACES East Pacific Zonal Transect from the R/V Thomas G. Thompson TN303 cruise in the tropical Pacific from Peru to Tahiti during 2013.

cdm_data_type = Other
VARIABLES:
EXPOCODE (text)
SECT_ID (text)
GEOTRC_EVENTNO (dimensionless)
STNNBR (dimensionless)
CASTNO (dimensionless)
CAST_TYPE (text)
DATE (unitless)
time2 (TIME, unitless)
time (ISO DATE TIME, seconds since 1970-01-01T00:00:00Z)
EVENT_CODE (text)
latitude (degrees_north)
longitude (degrees_east)
NAV (text)
CORR_DEPTH (meters)
HT_ABOVE_BOTTOM (meters)
WIRE_OUT (meters)
MAX_PRESS (dbar)
NO_BOTTLES (dimensionless)
PARAMETERS (text)
COMMENTS (text)


[GP16 CFC Sat] - CFC saturation along the US GEOTRACES East Pacific Zonal Transect from the R/V Thomas G. Thompson TN303 cruise in the tropical Pacific from Peru to Tahiti during 2013 (U.S. GEOTRACES EPZT project) (U.S. GEOTRACES East Pacific Zonal Transect)

CFC saturation along the US GEOTRACES East Pacific Zonal Transect from the R/V Thomas G. Thompson TN303 cruise in the tropical Pacific from Peru to Tahiti during 2013.

cdm_data_type = Other
VARIABLES:
EXPOCODE (text)
SECT_ID (text)
GEOTRC_EVENTNO (dimensionless)
Station (dimensionless)
Sample_Num (dimensionless)
GEOTRC_SAMPNO (dimensionless)
DATE (unitless)
time2 (TIME, HHMM)
time (ISO DATETIME, seconds since 1970-01-01T00:00:00Z)
latitude (degrees_north)
longitude (degrees_east)
pressure (decibars)
salinity (Sea Water Practical Salinity, PSS-78)
theta ((tbd))
f11spc ((tbd))
f12spc ((tbd))
f113spc ((tbd))
ccl4spc ((tbd))
sf6spc ((tbd))


[GP16 Cruise Event Log] - Scientific sampling event log associated with the US GEOTRACES East Pacific Zonal Transect cruise from R/V Thomas G. Thompson TN303 in the tropical Pacific from Peru to Tahiti during 2013 (U.S. GEOTRACES EPZT project) (U.S. GEOTRACES East Pacific Zonal Transect)

Scientific Sampling Event Log for TN303 (GEOTRACES EPZT). Station numbers, Events, Dates/Times, Lat/Lons and Event descriptions are provided for each station.

cdm_data_type = Other
VARIABLES:
GEOTRC_EVENTNO (integer)
LOCATION (text)
DATE_START (unitless)
TIME_START (unitless)
time (ISO DATETIME START, seconds since 1970-01-01T00:00:00Z)
DATE_END (unitless)
TIME_END (unitless)
ISO_DATETIME_END (unitless)
latitude (degrees_north)
longitude (degrees_east)
LAT_DEG_S (Latitude, degrees)
LAT_MIN_S (Latitude, dec_mins)
LON_DEG_W (degrees)
LON_MIN_W (dec_mins)
DEPTH_MIN (Depth, meters)
depth (m)
EVENT_DESCRIPTION (text)
SAMPLES_TAKEN (text)
GEOTRACES_ID_NUMBER_RANGE (text)
COMMENT (text)


[GP16 Cruise Track] - Cruise track along the US GEOTRACES East Pacific Zonal Transect from the R/V Thomas G. Thompson TN303 cruise in the tropical Pacific from Peru to Tahiti during 2013 (U.S. GEOTRACES EPZT project) (U.S. GEOTRACES East Pacific Zonal Transect)

Cruise track along the US GEOTRACES East Pacific Zonal Transect from the R/V Thomas G. Thompson TN303 cruise in the tropical Pacific from Peru to Tahiti during 2013.

cdm_data_type = Other
VARIABLES:
CruiseId (Cruise Id, text)
time (ISO Date Time UTC, seconds since 1970-01-01T00:00:00Z)
latitude (degrees_north)
longitude (degrees_east)
SOG (Speed Over Ground, meters/sec)
COG (Course Over Ground, decimal degrees)


[GP16 CTD - GT-C Bottle] - GTC bottle data along the US GEOTRACES East Pacific Zonal Transect from the R/V Thomas G. Thompson TN303 cruise in the tropical Pacific from Peru to Tahiti during 2013 (U.S. GEOTRACES EPZT project) (U.S. GEOTRACES East Pacific Zonal Transect)

GTC bottle data along the US GEOTRACES East Pacific Zonal Transect from the R/V Thomas G. Thompson TN303 cruise in the tropical Pacific from Peru to Tahiti during 2013.

cdm_data_type = Other
VARIABLES:
EXPOCODE (text)
SECT_ID (text)
STNNBR (dimensionless)
CASTNO (dimensionless)
GEOTRC_EVENTNO (dimensionless)
DATE (unitless)
time2 (TIME, unitless)
ISO_DATETIME (unitless)
latitude (degrees_north)
longitude (degrees_east)
GEOTRC_SAMPNO (dimensionless)
SAMPNO (dimensionless)
BTLNBR (text)
BTLNBR_FLAG_W (dimensionless)
BTL_DATE (unitless)
BTL_TIME (unitless)
time (BTL ISO DATETIME, seconds since 1970-01-01T00:00:00Z)
BTL_LAT (decimal degrees)
BTL_LON (decimal degrees)
ODF_CTDPRS (DBARS)
S_M_DEPTH (METERS)
F_M_DEPTH (METERS)
BTMDEPTH (CORR_M)
CTDPRS (DBARS)
CTDDEPTH (METERS)
CTDTMP (degrees celsius)
... (416 more variables)


[GP16 CTD - GT-C DownCasts] - GTC CTD down casts along the US GEOTRACES East Pacific Zonal Transect from the R/V Thomas G. Thompson TN303 cruise in the tropical Pacific from Peru to Tahiti during 2013 (U.S. GEOTRACES EPZT project) (U.S. GEOTRACES East Pacific Zonal Transect)

GTC CTD down casts along the US GEOTRACES East Pacific Zonal Transect from the R/V Thomas G. Thompson TN303 cruise in the tropical Pacific from Peru to Tahiti during 2013.

cdm_data_type = Other
VARIABLES:
DATASET_ID (text)
EXPOCODE (text)
SECT_ID (text)
GEOTRC_EVENTNO (dimensionless)
STNNBR (dimensionless)
CASTNO (dimensionless)
DATE (unitless)
time2 (TIME, HHMM)
time (ISO DATE TIME, seconds since 1970-01-01T00:00:00Z)
latitude (degrees_north)
longitude (degrees_east)
BTMDEPTH (meters)
INSTRUMENT_ID (dimensionless)
CTDPRS (DBARS)
CTDPRS_FLAG_W (dimensionless)
CTDTMP (degrees celsius)
CTDTMP_FLAG_W (dimensionless)
CTDSAL (PSS-78)
CTDSAL_FLAG_W (dimensionless)
CTDOXY (UMOL/KG)
CTDOXY_FLAG_W (dimensionless)
TRANSM (volts)
TRANSM_FLAG_W (dimensionless)
FLUORM (volts)
FLUORM_FLAG_W (dimensionless)
TURBDTY (volts)
... (7 more variables)


[GP16 CTD - ODF Bottle] - ODF bottle data along the US GEOTRACES East Pacific Zonal Transect from the R/V Thomas G. Thompson TN303 cruise in the tropical Pacific from Peru to Tahiti during 2013 (U.S. GEOTRACES EPZT project) (U.S. GEOTRACES East Pacific Zonal Transect)

ODF bottle data along the US GEOTRACES East Pacific Zonal Transect from the R/V Thomas G. Thompson TN303 cruise in the tropical Pacific from Peru to Tahiti during 2013.

cdm_data_type = Other
VARIABLES:
EXPOCODE (text)
SECT_ID (text)
STNNBR (dimensionless)
CASTNO (dimensionless)
GEOTRC_EVENTNO (dimensionless)
DATE (unitless)
time2 (TIME, HHMM)
time (ISO DATETIME, seconds since 1970-01-01T00:00:00Z)
latitude (degrees_north)
longitude (degrees_east)
GEOTRC_SAMPNO (dimensionless)
SAMPNO (dimensionless)
BTLNBR (text)
BTLNBR_FLAG_W (dimensionless)
BTL_DATE (unitless)
BTL_TIME (HHMM)
BTL_ISO_DATETIME (unitless)
BTL_LAT (decimal degrees)
BTL_LON (decimal degrees)
ODF_CTDPRS (DBARS)
SMDEPTH (METERS)
FMDEPTH (METERS)
BTMDEPTH (CORR_M)
CTDPRS (DBARS)
CTDDEPTH (METERS)
CTDTMP (degrees celsius)
... (392 more variables)


[GP16 CTD - ODF DownCasts] - ODF CTD down casts along the US GEOTRACES East Pacific Zonal Transect from the R/V Thomas G. Thompson TN303 cruise in the tropical Pacific from Peru to Tahiti during 2013 (U.S. GEOTRACES EPZT project) (U.S. GEOTRACES East Pacific Zonal Transect)

ODF CTD down casts along the US GEOTRACES East Pacific Zonal Transect from the R/V Thomas G. Thompson TN303 cruise in the tropical Pacific from Peru to Tahiti during 2013.

cdm_data_type = Other
VARIABLES:
DATASET_ID (text)
EXPOCODE (text)
SECT_ID (text)
GEOTRC_EVENTNO (dimensionless)
STNNBR (dimensionless)
CASTNO (dimensionless)
DATE (unitless)
time2 (TIME, HHMM)
time (ISO DATE TIME, seconds since 1970-01-01T00:00:00Z)
latitude (degrees_north)
longitude (degrees_east)
BTMDEPTH (meters)
INSTRUMENT_ID (dimensionless)
CTDPRS (DBARS)
CTDPRS_FLAG_W (dimensionless)
CTDTMP (degrees celsius)
CTDTMP_FLAG_W (dimensionless)
CTDSAL (PSS-78)
CTDSAL_FLAG_W (dimensionless)
CTDOXY (UMOL/KG)
CTDOXY_FLAG_W (dimensionless)
TRANSM (volts)
TRANSM_FLAG_W (dimensionless)
FLUORM (volts)
FLUORM_FLAG_W (dimensionless)
TURBDTY (volts)
... (9 more variables)


[GP16 d13C-DIC] - The 13C/12C stable carbon isotopic ratio of the dissolved inorganic carbon from samples collected on the GEOTRACES EPZT cruise (R/V Thomas G. Thompson TN303) in the Eastern Tropical South Pacific from October to December 2013 (U.S. GEOTRACES East Pacific Zonal Transect)

The 13C/12C stable carbon isotopic ratio of the dissolved inorganic carbon from samples collected on the GEOTRACES EPZT cruise (R/V Thomas G. Thompson TN303) in the Eastern Tropical South Pacific from October to December 2013.

cdm_data_type = Other
VARIABLES:
cruise_id (unitless)
EXPOCODE (unitless)
GEOTRC_INSTR (unitless)
STNNBR (unitless)
GEOTRC_SAMPNO (unitless)
GEOTRC_EVENTNO (unitless)
CASTNO (unitless)
DIC_13_D_DELTA_BOTTLE (per mil)
DIC_13_D_DELTA_BOTTLE_FLAG (unitless)
SAMPNO (unitless)
BTLNBR (unitless)
BTLNBR_FLAG_W (unitless)
ISO_DATETIME_UTC_START_EVENT (unitless)
latitude (EVENT LAT, degrees_north)
longitude (degrees_east)
time (BTL ISO DATETIME UTC, seconds since 1970-01-01T00:00:00Z)
BTL_LAT (decimal degrees)
BTL_LON (decimal degrees)
depth (CTDDEPTH, m)


[GP16 d15N NO3] - Nitrate isotope data from R/V Thomas G. Thompson cruise TN303 in the Eastern Tropical Pacific in 2013 (U.S. GEOTRACES EPZT project) (U.S. GEOTRACES East Pacific Zonal Transect)

Nitrate isotope data from R/V Thomas G. Thompson cruise TN303 in the Eastern Tropical Pacific in 2013 (U.S. GEOTRACES EPZT project).

cdm_data_type = Other
VARIABLES:
cruise_id (unitless)
STNNBR (unitless)
GEOTRC_EVENTNO (unitless)
CASTNO (unitless)
ISO_DATETIME_UTC_START_EVENT (unitless)
latitude (EVENT LAT, degrees_north)
longitude (degrees_east)
GEOTRC_INSTR (unitless)
GEOTRC_SAMPNO (unitless)
depth (m)
NO3_15_D_DELTA_BOTTLE (Mole Concentration Of Nitrate In Sea Water, permil)
NO3_15_D_DELTA_BOTTLE_STDEV (Mole Concentration Of Nitrate In Sea Water, permil)
num_of_analyses (dimensionless)
NO3_15_D_DELTA_BOTTLE_FLAG (dimensionless)
SAMPNO (unitless)
BTLNBR (unitless)
BTLNBR_FLAG_W (unitless)
time (BTL ISO DATETIME UTC, seconds since 1970-01-01T00:00:00Z)
BTL_LAT (decimal degrees)
BTL_LON (decimal degrees)
ODF_CTDPRS (decibars)
SMDEPTH (meters)
FMDEPTH (meters)
BTMDEPTH (meters)
CTDPRS (decibars)
CTDDEPTH (meters)


[GP16 Dissolved iron speciation] - Dissolved iron speciation from 2013 U.S. GEOTRACES Eastern Pacific Zonal Transect from R/V Thomas G. Thompson TN303 from October-December 2013 (U.S. GEOTRACES EPZT project, EPZT Fe Cu Co project) (U.S. GEOTRACES East Pacific Zonal Transect)

Dissolved iron-binding organic ligand concentrations and conditional stability
constants from surface GeoFish and GO-FLO water column samples collected in
2013 during the U.S. GEOTRACES GP16 cruise in the Eastern Pacific between Peru
and Tahiti on the R.V. Thomas G. Thompson, \u00a0cruise TN303.

The FISH and BOTTLE data have been split into separate columns as per
GEOTRACES Parameter Naming Conventions.The FISH data are to the far right.

* To access the data with the FISH and BOTTLE data merged, see:\u00a0[http://data.bco-dmo.org/jg/serv/BCO/GEOTRACES/EPZT/Fe_spec_EPZT_joined.html0%7Bdir=data.bco-dmo.org/jg/dir/BCO/GEOTRACES/EPZT/,info=data.bco-dmo.org/jg/info/BCO/GEOTRACES/EPZT/Fe_speciation%7D](\\http://data.bco-dmo.org/jg/serv/BCO/GEOTRACES/EPZT/Fe_spec_EPZT_joined.html0%7Bdir=data.bco-dmo.org/jg/dir/BCO/GEOTRACES/EPZT/,info=data.bco-dmo.org/jg/info/BCO/GEOTRACES/EPZT/Fe_speciation%7D\\)

cdm_data_type = Other
VARIABLES:
cruise_id (unitless)
station (unitless)
GEOTRC_SAMPNO (unitless)
latitude (degrees_north)
longitude (degrees_east)
depth (m)
Fe_D_CONC_BOTTLE (nanomoles/liter (10^-9 M))
L1Fe_D_CONC_BOTTLE (L1 Fe D CONC BOTTLE, nanomoles/liter (10^-9 M))
L1_FLAG (unitless)
L1_95pcnt_CI (nanomoles/liter (10^-9 M))
L1Fe_D_LogK_BOTTLE (L1 Fe D Log K BOTTLE, No units; K1 has units of M-1)
log_K1_FLAG (unitless)
log_K1_95pcnt_CI (No units; K1 has units of M-1)
L2Fe_D_CONC_BOTTLE (L2 Fe D CONC BOTTLE, nanomoles/liter (10^-9 M))
L2_FLAG (unitless)
L2_95pcnt_CI (nanomoles/liter (10^-9 M))
L2Fe_D_LogK_BOTTLE (L2 Fe D Log K BOTTLE, No units; K2 has units of M^-1)
log_K2_FLAG (unitless)
... (29 more variables)


[GP16 Dissolved Nd Isotopes and REEs - LDEO] - Dissolved neodymium (Nd) isotopes and concentrations of rare-earth elements (REEs) reported by LDEO in seawater samples collected during the GEOTRACES GP16 East Pacific Zonal Transect cruise (TN303) on R/V Thomas G. Thompson from October to December 2013 (U.S. GEOTRACES East Pacific Zonal Transect (GP16))

This dataset includes dissolved neodymium (Nd) isotopes and concentrations of rare earth elements (REEs) in seawater samples collected along the GEOTRACES GP16 East Pacific Zonal Transect. The cruise was aboard the R/V Thomas G. Thompson between October 25 and December 20, 2013 from Manta, Ecuador to Papeete, Tahiti. Multicollector-inductively coupled plasma-mass spectrometry (MC-ICP-MS) was used to analyze Nd isotopes and quadrupole ICP‐MS was used to analyze REE concentrations.

This cruise provides a great opportunity to understand sources, sinks, and cycling of REEs in the ocean as well as how well Nd isotopes behave as a conservative water mass tracer. The data were collected by Yingzhe Wu and Chandranath Basak at Lamont-Doherty Earth Observatory of Columbia University.

cdm_data_type = Other
VARIABLES:
Station_ID (unitless)
time (Iso_datetime_utc_start, seconds since 1970-01-01T00:00:00Z)
Start_Date_UTC (unitless)
Start_Time_UTC (unitless)
Start_Latitude (degrees_north)
longitude (Start_longitude, degrees_east)
Event_ID (unitless)
Sample_ID (unitless)
depth (Sample_depth, m)
CTDPRS_T_VALUE_SENSOR_vvdwtp (decibars (dbar))
SD1_CTDPRS_T_VALUE_SENSOR_vvdwtp (decibars (dbar))
Flag_CTDPRS_T_VALUE_SENSOR_vvdwtp (unitless)
CTDTMP_T_VALUE_SENSOR_fp7gnu (degrees Celsius)
SD1_CTDTMP_T_VALUE_SENSOR_fp7gnu (degrees Celsius)
Flag_CTDTMP_T_VALUE_SENSOR_fp7gnu (unitless)
CTDSAL_D_CONC_SENSOR_dipxfj (PSU?)
SD1_CTDSAL_D_CONC_SENSOR_dipxfj (PSU?)
Flag_CTDSAL_D_CONC_SENSOR_dipxfj (unitless)
... (102 more variables)


[GP16 Dissolved REEs] - Dissolved REE concentrations and Nd isotopes from the GEOTRACES EPZT R/V Thomas G. Thompson cruise TN303 from November to December 2013 (U.S. GEOTRACES East Pacific Zonal Transect)

Dissolved REE concentrations and Nd isotopes from the GEOTRACES EPZT R/V Thomas G. Thompson cruise TN303 from November to December 2013.

cdm_data_type = Other
VARIABLES:
Cruise (unitless)
Station (unitless)
GEOTRC_SAMPNO (unitless)
depth (m)
Sampling_Device (unitless)
Year (unitless)
time (Date Time, seconds since 1970-01-01T00:00:00Z)
longitude (degrees_east)
latitude (degrees_north)
La_D_CONC_BOTTLE (picomoles per kilogram (pmol/kg))
La_D_CONC_BOTTLE_QV_IODE (unitless)
Ce_D_CONC_BOTTLE (pmol/kg)
Ce_D_CONC_BOTTLE_QV_IODE (unitless)
Pr_D_CONC_BOTTLE (pmol/kg)
Pr_D_CONC_BOTTLE_QV_IODE (unitless)
Nd_D_CONC_BOTTLE (pmol/kg)
Nd_D_CONC_BOTTLE_QV_IODE (unitless)
Sm_D_CONC_BOTTLE (pmol/kg)
Sm_D_CONC_BOTTLE_QV_IODE (unitless)
Eu_D_CONC_BOTTLE (pmol/kg)
Eu_D_CONC_BOTTLE_QV_IODE (unitless)
Gd_D_CONC_BOTTLE (pmol/kg)
Gd_D_CONC_BOTTLE_QV_IODE (unitless)
Tb_D_CONC_BOTTLE (pmol/kg)
Tb_D_CONC_BOTTLE_QV_IODE (unitless)
Dy_D_CONC_BOTTLE (pmol/kg)
... (45 more variables)


[GP16 Elemental selenium and particulate Acid-Volatile Sulfide] - Particulate Acid-Volatile Sulfide (pAVS) and elemental selenium (pSe) concentrations from a McLane pump collected during the R/V Thomas G. Thompson cruise TN303 from Peru to Tahiti in 2013 (U.S. GEOTRACES EPZT project) (U.S. GEOTRACES East Pacific Zonal Transect)

Particulate Acid-Volatile Sulfide (pAVS) and elemental selenium (pSe) concentrations from a McLane pump collected during the R/V Thomas G. Thompson cruise TN303 from Peru to Tahiti in 2013.

cdm_data_type = Other
VARIABLES:
cruise_id (unitless)
EXPOCODE (unitless)
SECT_ID (unitless)
GEOTRC_INSTR (unitless)
STNNBR (unitless)
CASTNO (unitless)
GEOTRC_EVENTNO (unitless)
DATE_START_EVENT (unitless)
TIME_START_EVENT (unitless)
time (ISO DATETIME UTC START EVENT, seconds since 1970-01-01T00:00:00Z)
latitude (EVENT LAT, degrees_north)
longitude (degrees_east)
DEPTH_MIN (Depth, meters)
DEPTH_MAX (Depth, meters)
GEOTRC_SAMPNO (unitless)
SAMPNO (unitless)
depth (m)
AVS_TP_CONC_PUMP (picomoles per liter)
Se_0_TP_CONC_PUMP (nanomoles per liter)


[GP16 GeoFish - Nuts and Sals] - GeoFish nutrients and salts along the US GEOTRACES East Pacific Zonal Transect from the R/V Thomas G. Thompson TN303 cruise in the tropical Pacific from Peru to Tahiti during 2013 (U.S. GEOTRACES EPZT project) (U.S. GEOTRACES East Pacific Zonal Transect)

GeoFish nutrients and salts along the US GEOTRACES East Pacific Zonal Transect from the R/V Thomas G. Thompson TN303 cruise in the tropical Pacific from Peru to Tahiti during 2013.

cdm_data_type = Other
VARIABLES:
EXPOCODE (text)
SECT_ID (text)
GEOTRC_EVENTNO (dimensionless)
Station (dimensionless)
GEOTRC_SAMPNO (dimensionless)
DATE (unitless)
time2 (TIME, HHMM)
time (ISO DATETIME, seconds since 1970-01-01T00:00:00Z)
latitude (degrees_north)
longitude (degrees_east)
NO3 (Mole Concentration Of Nitrate In Sea Water, umol/L)
PO4 (Mass Concentration Of Phosphate In Sea Water, umol/L)
SIL (umol/L)
NO2 (Mole Concentration Of Nitrite In Sea Water, umol/L)
Salinity (Sea Water Practical Salinity, PSS-78)


[GP16 N2O Isotopes and Concentrations] - Nitrous oxide (N2O) isotopes and concentrations from the U.S. GEOTRACES EPZT cruise (GP16, TN303) on R/V Thomas G. Thompson in the tropical Pacific from October to December 2013 (U.S. GEOTRACES East Pacific Zonal Transect (GP16))

This dataset includes nitrous oxide (N2O) isotopes and concentration measurements with accompanying physiochemical data from the 2013 U.S. GEOTRACES East Pacific Zonal Transect cruise (GP16). The cruise sailed from October 25, 2013 to December 18, 2023 aboard the R/V Thompson.

cdm_data_type = Other
VARIABLES:
STNNBR (unitless)
GEOTRC_EVENTNO (unitless)
GEOTRC_SAMPNO (unitless)
DATE (unitless)
latitude (degrees_north)
longitude (degrees_east)
CTDPRS (decibars)
depth (m)
CTDTMP (degrees Celsius)
CTDSAL (PSU)
N2O_ALPHA_15_14_D_DELTA_BOTTLE_mmz7wk (permille)
SD1_N2O_ALPHA_15_14_D_DELTA_BOTTLE_mmz7wk (permille)
N2O_BETA_15_14_D_DELTA_BOTTLE (permille)
SD1_N2O_BETA_15_14_D_DELTA_BOTTLE (permille)
N2O_SP_15_14_D_DELTA_BOTTLE (permille)
SD1_N2O_SP_15_14_D_DELTA_BOTTLE (permille)
N2O_15_14_D_DELTA_BOTTLE_f2vswm (permille)
SD1_N2O_15_14_D_DELTA_BOTTLE_f2vswm (permille)
N2O_17_16_D_DELTA_BOTTLE (permille)
SD1_N2O_17_16_D_DELTA_BOTTLE (permille)
N2O_18_16_D_DELTA_BOTTLE_xkal8d (permille)
SD1_N2O_18_16_D_DELTA_BOTTLE_xkal8d (permille)
N2O_D_CONC_BOTTLE_ahlf1q (nanomolar (nmol/L))
SD1_N2O_D_CONC_BOTTLE_ahlf1q (nanomolar (nmol/L))
N2O_Flag (unitless)
... (6 more variables)


[GP16 Nitrite Isotopes and Concentrations] - Nitrite (NO2-) isotopes and concentrations from the U.S. GEOTRACES EPZT cruise (GP16, TN303) on R/V Thomas G. Thompson in the tropical Pacific from October to December 2013 (U.S. GEOTRACES East Pacific Zonal Transect (GP16))

This dataset includes nitrite (NO2-) isotopes and concentration measurements with accompanying physiochemical data from the 2013 U.S. GEOTRACES East Pacific Zonal Transect cruise (GP16). The cruise sailed from October 25, 2013 to December 18, 2023 aboard the R/V Thompson.

cdm_data_type = Other
VARIABLES:
STNNBR (unitless)
GEOTRC_EVENTNO (unitless)
GEOTRC_SAMPNO (unitless)
DATE (unitless)
latitude (degrees_north)
longitude (degrees_east)
CTDPRS (decibars)
depth (m)
CTDTMP (degrees Celsius)
CTDSAL (PSU)
NITRITE (micromoles per liter (umol/L))
NITRITE_15_14_D_DELTA_BOTTLE_x5fmqg (permille)
SD1_NITRITE_15_14_D_DELTA_BOTTLE_x5fmqg (permille)
Flag_NITRITE_15_14_D_DELTA_BOTTLE_x5fmqg (unitless)
NITRITE_18_16_D_DELTA_BOTTLE_iqunnm (permille)
SD1_NITRITE_18_16_D_DELTA_BOTTLE_iqunnm (permille)
Flag_NITRITE_18_16_D_DELTA_BOTTLE_iqunnm (unitless)


[GP16 Particle Composition] - Size-fractionated major and minor particle composition and concentration collected from RV Thompson (TN303) along the US GEOTRACES EPZT transect in the Eastern Tropical Pacific during 2013 (US GEOTRACES EPZT project) (U.S. GEOTRACES East Pacific Zonal Transect)

Size-fractionated major and minor particle composition and concentration collected from RV Thompson (TN303) along the US GEOTRACES EPZT transect in the Eastern Tropical Pacific during 2013 (US GEOTRACES EPZT project)

cdm_data_type = Other
VARIABLES:
cruise_id (unitless)
STNNBR (unitless)
GEOTRC_SAMPNO (unitless)
GEOTRC_EVENTNO (unitless)
time (ISO Date Time UTC, seconds since 1970-01-01T00:00:00Z)
CASTNO (unitless)
latitude (degrees_north)
longitude (PUMP LON, degrees_east)
BTMDEPTH (meters)
DEPTH_MAX (Depth, meters)
sliters (liters)
Y_SPT_CONC_PUMP (picomole per liter)
Mo_SPT_CONC_PUMP (picomole per liter)
Ag_SPT_CONC_PUMP (picomole per liter)
Cd_SPT_CONC_PUMP (picomole per liter)
Ba_SPT_CONC_PUMP (picomole per liter)
Nd_SPT_CONC_PUMP (picomole per liter)
Pb_SPT_CONC_PUMP (picomole per liter)
Th_SPT_CONC_PUMP (picomole per liter)
Al_SPT_CONC_PUMP (picomole per liter)
P_SPT_CONC_PUMP (picomole per liter)
Sc_SPT_CONC_PUMP (picomole per liter)
Ti_SPT_CONC_PUMP (picomole per liter)
V_SPT_CONC_PUMP (picomole per liter)
Mn_SPT_CONC_PUMP (picomole per liter)
... (169 more variables)


[GP16 Polonium-210 and Lead-210 dissolved] - Dissolved Po-210 and Pb-210 from GEOTRACES-EZPT cruise TN303, 2013 (U.S. GEOTRACES East Pacific Zonal Transect)

Dissolved Po-210 and Pb-210 in six vertical profiles from super stations of EPZT of US GEOTRACES cruise on RV Thompson cruise 303. Dissolved Po-210 and Pb-210, dissolved: \u2264 0.45 mm; units: disintegration per minute (dpm) / 100 L of water.

cdm_data_type = Other
VARIABLES:
cruise_id (unitless)
STNNBR (unitless)
GEOTRC_SAMPNO (unitless)
depth_PI (Depth, meters)
depth (CTDDEPTH, m)
latitude (BTL LAT, degrees_north)
longitude (BTL LON, degrees_east)
CASTNO (unitless)
GEOTRC_EVENTNO (unitless)
SAMPNO (unitless)
BTLNBR (unitless)
BTLNBR_FLAG_W (unitless)
ISO_DATETIME_UTC_START_EVENT (unitless)
time (BTL ISO DATETIME UTC, seconds since 1970-01-01T00:00:00Z)
vol_sample (kg)
Po_210_D_CONC_BOTTLE (210Po  dpm 100L-1)
Po_210_D_CONC_BOTTLE_sd (210Po  dpm 100L-1)
Po_210_D_CONC_BOTTLE_flag (unitless)
Pb_210_D_CONC_BOTTLE (210Pb  dpm 100L-1)
Pb_210_D_CONC_BOTTLE_sd (210Pb  dpm 100L-1)
Pb_210_D_CONC_BOTTLE_flag (unitless)
Po_210_Pb_210_D_RATIO_BOTTLE (unitless)
Po_210_Pb_210_D_RATIO_BOTTLE_sd (unitless)
Po_210_D_CONC_FISH (210Po  dpm 100L-1)
Po_210_D_CONC_FISH_sd (210Po  dpm 100L-1)
... (6 more variables)


[GP16 PUMPs - Nuts and Sals] - Pump nutrients and salts along the US GEOTRACES East Pacific Zonal Transect from the R/V Thomas G. Thompson TN303 cruise in the tropical Pacific from Peru to Tahiti during 2013 (U.S. GEOTRACES EPZT project) (U.S. GEOTRACES East Pacific Zonal Transect)

Pump nutrients and salts along the US GEOTRACES East Pacific Zonal Transect from the R/V Thomas G. Thompson TN303 cruise in the tropical Pacific from Peru to Tahiti during 2013.

cdm_data_type = Other
VARIABLES:
EXPOCODE (text)
SECT_ID (text)
GEOTRC_EVENTNO (dimensionless)
Station (dimensionless)
GEOTRC_SAMPNO (dimensionless)
Pump_SampleNo (Pump Sample No, dimensionless)
DATE (unitless)
time2 (TIME, HHMM)
time (ISO DATETIME, seconds since 1970-01-01T00:00:00Z)
latitude (degrees_north)
longitude (degrees_east)
NO3 (Mole Concentration Of Nitrate In Sea Water, umol/L)
PO4 (Mass Concentration Of Phosphate In Sea Water, umol/L)
SIL (umol/L)
NO2 (Mole Concentration Of Nitrite In Sea Water, umol/L)
Salinity (Sea Water Practical Salinity, PSS-78)


[GP16 Soluble and Dissolved Fe and Fe Isotopes] - Concentrations of soluble and dissolved iron (Fe) and iron isotope ratios from the U.S. GEOTRACES EPZT cruise (GP16, TN303) on R/V Thomas G. Thompson in the tropical Pacific during November & December 2013 (U.S. GEOTRACES East Pacific Zonal Transect)

Concentrations of soluble and dissolved iron (Fe) and iron isotope ratios from the U.S. GEOTRACES EPZT cruise (GP16, TN303) on R/V Thomas G. Thompson in the tropical Pacific during November & December 2013.

cdm_data_type = Other
VARIABLES:
cruise (unitless)
station_no (unitless)
cast_no (unitless)
event_no (unitless)
geotraces_no (unitless)
date (unitless)
time2 (Time, unitless)
time (ISO Date Time UTC, seconds since 1970-01-01T00:00:00Z)
latitude (degrees_north)
longitude (degrees_east)
depth (Ctd Depth, m)
dFe_conc (D Fe Conc, nanomoles per kilogram (nmol kg-1))
dFe_conc_error (D Fe Conc Error, nanomoles per kilogram (nmol kg-1))
dFe_conc_flag (D Fe Conc Flag, unitless)
sFe_conc (S Fe Conc, nanomoles per kilogram (nmol kg-1))
sFe_conc_error (S Fe Conc Error, nanomoles per kilogram (nmol kg-1))
sFe_conc_flag (S Fe Conc Flag, unitless)
delta_56_dFe (Delta 56 D Fe, per mil (‰))
delta_56_dFe_error (Delta 56 D Fe Error, per mil (‰))
delta_56_dFe_flag (Delta 56 D Fe Flag, unitless)
delta_56_sFe (Delta 56 S Fe, per mil (‰))
delta_56_sFe_error (Delta 56 S Fe Error, per mil (‰))
delta_56_sFe_flag (Delta 56 S Fe Flag, unitless)


[GP16 Thorium-234 Particulate] - Particulate Th-234 from in-situ pumps, including large size fraction (> 51 um) and small size fraction (1-51 um), from R/V Thomas G. Thompson cruise TN303 in the Eastern Tropical Pacific in 2013 (U.S. GEOTRACES EPZT project) (U.S. GEOTRACES East Pacific Zonal Transect)

Particulate Thorium-234 from in-situ pumps, including large size fraction (> 51 \u00b5m) and small size fraction (1-51 \u00b5m), during the 2013 U.S. GEOTRACES cruise.

cdm_data_type = Other
VARIABLES:
Station_ID (unitless)
Start_Date_UTC (unitless)
Start_Time_UTC (unitless)
time (Start ISO Date Time UTC, seconds since 1970-01-01T00:00:00Z)
End_Date_UTC (unitless)
End_Time_UTC (unitless)
End_ISO_DateTime_UTC (End ISO Date Time UTC, unitless)
latitude (degrees_north)
longitude (degrees_east)
End_Latitude (Latitude, decimal degrees North)
End_Longitude (Longitude, decimal degrees East)
Event_ID (unitless)
Sample_ID (unitless)
depth (Sample Depth, m)
Th_234_LPT_CONC_PUMP_byeecv (mBq/kg)
SD1_Th_234_LPT_CONC_PUMP_byeecv (mBq/kg)
Flag_Th_234_LPT_CONC_PUMP_byeecv (unitless)
Th_234_SPT_CONC_PUMP_bm10kg (mBq/kg)
SD1_Th_234_SPT_CONC_PUMP_bm10kg (mBq/kg)
Flag_Th_234_SPT_CONC_PUMP_bm10kg (unitless)


[GP16 Thorium-234 Total] - Water-column total Th-234 from R/V Thomas G. Thompson cruise TN303 in the Eastern Tropical Pacific in 2013 (U.S. GEOTRACES EPZT project) (U.S. GEOTRACES East Pacific Zonal Transect)

Water-column total Th-234 with 4 L method from the 2013 U.S. GEOTRACES EPZT cruise.\r\n\r\nU-238 from U-salinity relationship was also determined but not reported in this dataset. These data can be made available upon request from the PI and/or dataset contact. Methods are described below.

cdm_data_type = Other
VARIABLES:
Station_ID (unitless)
Start_Date_UTC (unitless)
Start_Time_UTC (unitless)
time (Start ISO Date Time UTC, seconds since 1970-01-01T00:00:00Z)
End_Date_UTC (unitless)
End_Time_UTC (unitless)
End_ISO_DateTime_UTC (End ISO Date Time UTC, unitless)
latitude (degrees_north)
longitude (degrees_east)
End_Latitude (Latitude, decimal degrees North)
End_Longitude (Longitude, decimal degrees East)
Event_ID (unitless)
Sample_ID (unitless)
depth (Sample Depth, m)
Th_234_T_CONC_BOTTLE_oepuv9 (mBq/kg)
SD1_Th_234_T_CONC_BOTTLE_oepuv9 (mBq/kg)
Flag_Th_234_T_CONC_BOTTLE_oepuv9 (None)
Th_234_T_CONC_UWAY_gy2zni (mBq/kg)
SD1_Th_234_T_CONC_UWAY_gy2zni (mBq/kg)
Flag_Th_234_T_CONC_UWAY_gy2zni (None)


[GP16 Total Particulate Aerosols] - Total particulate trace element concentrations from bulk aerosol samples collected during the US GEOTRACES EPZT section cruise (R/V Thomas G. Thompson TN303) in the Eastern Tropical Pacific from October to December 2013 (U.S. GEOTRACES East Pacific Zonal Transect)

Atmospheric input is important to the biogeochemical cycling of trace metals in the ocean. This dataset provides total particulate trace metal values from bulk aerosols over the Equatorial Pacific along the US GEOTRACES EPTZ transect (TN303) from Peru to Tahiti. This region is characterized as one of the lowest atmospheric deposition regimes in the ocean. Bulk aerosols were collected from the boundary layer (~15 m above sea level) using a high-volume aerosol sampler drawing approximately 1.2 cubic meters of air per minute over Whatman 41 ash-less filter discs. Despite low aerosol loadings, triplicate agreement for most samples was good for Al, Ti, V, Mn, Fe, and Cu. Away from the coast, Cd and Pb values in most samples were close to, or below detection limit. Total digestions were carried out with a combination of hydrochloric acid, nitric acid, hydrofluoric acid, heat, and pressure. Total particulate trace metal concentrations were determined at the University of Alaska Fairbanks by inductively coupled plasma mass spectrometry (Thermo Element-2) using external calibration curves.

cdm_data_type = Other
VARIABLES:
Station_ID (unitless)
Start_Date_UTC (unitless)
Start_Time_UTC (unitless)
time (Start ISO Date Time UTC, seconds since 1970-01-01T00:00:00Z)
End_Date_UTC (unitless)
End_Time_UTC (unitless)
End_ISO_DateTime_UTC (End ISO Date Time UTC, unitless)
latitude (degrees_north)
longitude (degrees_east)
End_Latitude (Latitude, degrees North)
End_Longitude (Longitude, degrees East)
Event_ID (unitless)
Sample_ID (unitless)
depth (Sample Depth, m)
air_vol_total (cubic meters (m3))
Al_A_T_CONC_HIVOL_o1yvlu (nanograms per cubic meter (ng/m3))
... (23 more variables)


[GP16 Water Mass Percentages] - Results from Optimum Multiparameter Water Mass Analysis (OMPA) obtained using temperature, salinity, nutrient, and oxygen data from R/V Thomas G. Thompson cruise TN303 in the Eastern Tropical Pacific from October to December 2013 (U.S. GEOTRACES East Pacific Zonal Transect)

Results from Optimum Multiparameter Water Mass Analysis (OMPA) obtained using temperature, salinity, nutrient, and oxygen data from R/V Thomas G. Thompson cruise TN303 in the Eastern Tropical Pacific from October to December 2013.

cdm_data_type = Other
VARIABLES:
cruise_id (unitless)
GEOTRC_INSTR (unitless)
STNNBR (unitless)
latitude (degrees_north)
longitude (degrees_east)
GEOTRC_SAMPNO (unitless)
GEOTRC_EVENTNO (unitless)
CASTNO (unitless)
CTDPRS (decibars (db))
depth (CTDDEPTH, m)
SAMPNO (unitless)
BTLNBR (unitless)
BTLNBR_FLAG_W (unitless)
time (BTL ISO DATETIME UTC, seconds since 1970-01-01T00:00:00Z)
BTL_LAT (decimal degrees)
BTL_LON (decimal degrees)
ESSW_PCT (percent (%))
ESSW_UNCT (percent (%))
ESSW_STN (dimensionless)
ESPIW_PCT (percent (%))
ESPIW_UNCT (percent (%))
ESPIW_STN (dimensionless)
SPCW_PCT (percent (%))
SPCW_UNCT (percent (%))
SPCW_STN (dimensionless)
... (19 more variables)


[GP17-ANT Fe-binding humic-like substances] - Concentrations of iron bound to humic-like substances and total iron-binding capacity of humic-like substances from discrete samples collected on the GP17-ANT RVIB Palmer cruise NBP24-01 in the Amundsen Sea from Nov 2023 to Jan 2024 (Collaborative Research: U.S. GEOTRACES GP17-OCE and GP17-ANT: Characterizing iron-binding organic ligands in the Southern Ocean and implications for iron cycling in the global ocean)

This dataset includes the concentrations of iron (Fe) bound to humic-like substances and total iron-binding capacity of humic-like substances from discrete depth profile and towfish samples collected on the GP17-ANT cruise NBP24-01 on the R/V IB Nathaniel B. Palmer in the Amundsen Sea from 29 November 2023 to 28 January 2024.

This project investigates the impact of Fe-binding humic-like substances on Fe biogeochemistry in the Amundsen Sea. The project used a combination of depth profile and surface towfish samples to characterize the contributions of humic-like substances to Fe biogeochemistry across gradients in primary production, water masses, and bathymetric features in the Amundsen Sea. Understanding the distributions of Fe-binding humic-like substances provides insight into the impact of compositional changes of the Fe-binding ligand pool on Fe biogeochemistry and may help elucidate specific sources of these ligands.

cdm_data_type = Other
VARIABLES:
CRUISE_ID (unitless)
SECT_ID (unitless)
STNNBR (unitless)
PLATFORM (unitless)
CASTNO (unitless)
SAMPNO (unitless)
EVENT_NO (unitless)
GEOTRC_SAMPNO (unitless)
BTLNBR (unitless)
DATE (unitless)
time_unitless (Time, unitless)
time (Iso_datetime_utc, seconds since 1970-01-01T00:00:00Z)
LATITUDE (degrees_north)
LONGITUDE (degrees_east)
DEPTH (meters (m))
CTDPRS (decibars (db))
... (14 more variables)


[GP17-OCE Beryllium-7 in seawater and aerosols] - Aerosol and seawater beryllium-7 concentrations from the US GEOTRACES GP17-OCE cruise on R/V Roger Revelle (RR2214) in the South Pacific and Southern Oceans from December 2022 to January 2023 (US GEOTRACES GP17 Section: South Pacific and Southern Ocean (GP17-OCE))

Beryllium-7, a radioactive isotope with a half-life of 53.3 days, is formed in the atmosphere, attaches to aerosol particles, and is deposited on the earth's surface through wet and dry processes. In this project, we measured Be-7 concentrations in aerosol particles and in seawater samples (depths < 200 meters) collected on the GEOTRACES GP17-OCE cruise aboard R/V Roger Revelle. The cruise originated in Papeete, Tahiti, French Polynesia on 1 December 2022 and concluded on 25 January 2023 in Punta Arenas, Chile. Sixteen aerosol samples and seawater from twelve stations in the South Pacific and Southern Oceans were collected. The dataset will be used to study the deposition of trace elements and isotopes (TEIs) and upper ocean mixing processes. Aerosol deposition is an important source of TE micronutrients to open ocean areas that are far removed from riverine sources. But, while the collection aerosol of samples for TEI analysis is straightforward, estimating the deposition flux also requires an appropriate deposition velocity (i.e. deposition flux is the product of the aerosol concentration and deposition velocity). Because Be-7 is supplied to the open ocean exclusively through aerosol deposition and it is removed through radioactive decay, the water column inventory and aerosol concentration of Be-7 can be used to derive the deposition velocity applicable to aerosol TEIs. The penetration of dissolved Be-7 below the ocean mixed layer is limited by the isotope's half-life and the rate of vertical diffusive mixing. Through modeling, the shape of the Be-7 profile below the mixed layer provides an estimate for the vertical diffusivity coefficient (Kz), which can be used to calculate fluxes of chemical species (e.g. oxygen) and physical properties (e.g. heat).

cdm_data_type = Other
VARIABLES:
Station_ID (unitless)
Event_ID (unitless)
Start_Date_UTC (unitless)
Start_Time_UTC (unitless)
time (Start_iso_datetime_utc, seconds since 1970-01-01T00:00:00Z)
End_Date_UTC (unitless)
End_Time_UTC (unitless)
End_ISO_DateTime_UTC (seconds since 1970-01-01T00:00:00Z)
Start_Latitude (degrees_north)
... (11 more variables)


[GP17-OCE CFCs and SF6 concentrations] - Measurement of dissolved CFC-11, CFC-12, CFC-113, and SF6  from Niskin bottles on the US GEOTRACES GP-17 OCE cruise RR2214 on R/V Roger Revelle from December 2022 to January 2023 (US GEOTRACES GP17 Section: South Pacific and Southern Ocean (GP17-OCE))

This dataset reportes measurements of dissolved CFC-11, CFC-12, CFC-113, and SF6  from Niskin bottle samples collected on the US GEOTRACES GP-17 OCE cruise RR2214 on R/V Roger Revelle from December 2022 to January 2023.

cdm_data_type = Other
VARIABLES:
Station_ID (unitless)
Event_ID (unitless)
time (Start_iso_datetime_utc, seconds since 1970-01-01T00:00:00Z)
Start_Date_UTC (unitless)
Start_Time_UTC (unitless)
latitude (Start_latitude, degrees_north)
longitude (Start_longitude, degrees_east)
Rosette_Position (unitless)
Sample_ID (unitless)
depth (Sample_depth, m)
SF6_D_CONC_BOTTLE_wokyfy (femtomoles per kilogram (fmol/kg))
SD1_SF6_D_CONC_BOTTLE_wokyfy (unitless)
Flag_SF6_D_CONC_BOTTLE_wokyfy (unitless)
CFC12_D_CONC_BOTTLE_oj2de5 (picomoles per kilogram (pmol/kg))
SD1_CFC12_D_CONC_BOTTLE_oj2de5 (unitless)
Flag_CFC12_D_CONC_BOTTLE_oj2de5 (unitless)
CFC113_D_CONC_BOTTLE_q9hv9q (picomoles per kilogram (pmol/kg))
SD1_CFC113_D_CONC_BOTTLE_q9hv9q (unitless)
Flag_CFC113_D_CONC_BOTTLE_q9hv9q (unitless)
CFC11_D_CONC_BOTTLE_6mxfuc (picomoles per kilogram (pmol/kg))
SD1_CFC11_D_CONC_BOTTLE_6mxfuc (unitless)
Flag_CFC11_D_CONC_BOTTLE_6mxfuc (unitless)


[GP17-OCE CTD Profiles] - Processed CTD profile data from both rosettes (GTC and ODF) deployed on the US GEOTRACES GP17-OCE cruise on R/V Roger Revelle (RR2214) from December 2022 to January 2023 (US GEOTRACES GP17 Section: South Pacific and Southern Ocean (GP17-OCE))

This dataset includes the processed CTD profile data from both rosettes (GTC and ODF) deployed on the US GEOTRACES GP17-OCE cruise on R/V Roger Revelle (RR2214) from December 2022 to January 2023. Data are binned to 2 meters. Data were processed by the Oceanographic Data Facility (ODF) at Scripps Institution of Oceanography.

cdm_data_type = Other
VARIABLES:
Cruise (unitless)
Station (unitless)
Cast (unitless)
Event (unitless)
Action (unitless)
Type (unitless)
Instrument (unitless)
time (Iso_datetime_utc, seconds since 1970-01-01T00:00:00Z)
Longitude_360 (decimal degrees)
longitude (degrees_east)
latitude (degrees_north)
Bot_Depth (meters (m))
Comments (unitless)
CTDPRS_UP_T_VALUE_SENSOR (decibars (db))
QV_WOCECTD_CTDPRS (unitless)
CTDTMP_UP_T_VALUE_SENSOR (degrees Celsius)
QV_WOCECTD_CTDTMP (unitless)
CTDSAL_UP_D_VALUE_SENSOR (PSU)
QV_WOCECTD_CTDSAL (unitless)
CTDOXY_UP_D_VALUE_SENSOR (micromoles per kilogram (umol/kg))
QV_WOCECTD_CTDOXY (unitless)
CTDXMISS_UP_RAW_T_VALUE_SENSOR (0-5 volts direct current (VDC))
QV_WOCECTD_CTDXMISS (unitless)
CTDFLUOR_UP_RAW_T_VALUE_SENSOR (0-5 volts direct current (VDC))
... (7 more variables)


[GP17-OCE Dissolved Fe and Mn] - Concentrations of dissolved iron and manganese determined in water-column and near-surface seawater samples collected on the US GEOTRACES GP17-OCE cruise on R/V Roger Revelle (RR2214) in the South Pacific and Southern Oceans from Dec 2022 to Jan 2023 (US GEOTRACES GP17 Section: South Pacific and Southern Ocean (GP17-OCE))

These data comprise the concentrations of dissolved iron and manganese determined in water-column and near-surface seawater samples, collected using a trace-metal clean CTD rosette or underway towfish sampler, respectively, during U.S. GEOTRACES cruise GP17-OCE (R/V Roger Revelle cruise RR2214). The dissolved iron data include shipboard measurements made using flow-injection analysis, and post-cruise measurements made using inductively-coupled plasma mass spectrometry, whereas the dissolved manganese data include only post-cruise measurements made using inductively-coupled plasma mass spectrometry.

cdm_data_type = Other
VARIABLES:
Station (unitless)
GEOTRACES_Sample_ID (unitless)
Date (unitless)
latitude (Lat_n, degrees_north)
longitude (Long_e, degrees_east)
Seafloor_Depth_m (meters (m))
Sample_P_dbar (decibar)
depth (Sample_depth_m, m)
DFe_FIA_nM (nanomole per liter)
SD_DFe_FIA_nM (nanomole per liter)
DFe_FIA_Flag (unitless)
DFe_ICP_nM (nanomole per liter)
SD_DFe_ICP_nM (nanomole per liter)
DFe_ICP_Flag (unitless)
DMn_ICP_nM (nanomole per liter)
SD_DMn_ICP_nM (nanomole per liter)
DMn_ICP_Flag (unitless)


[GP17-OCE Dissolved Gallium in the South Pacific Ocean] - Dissolved gallium (Ga) from the US GEOTRACES GP17-OCE cruise on R/V Roger Revelle (RR2214) in the South Pacific and Southern Oceans from December 2022 to January 2023 (US GEOTRACES GP17 Section: South Pacific and Southern Ocean (GP17-OCE))

Dissolved gallium (Ga) was determined in association with a US GEOTRACES cruise (GP17-OCE/RR2214) in the South Pacific and Southern Ocean. The cruise sampled formation regions for globally distributed water masses, the return flow of Pacific Deep Water into the Southern Ocean, hydrothermally influenced waters, margin waters, and a gradient of low to high productivity with varying limiting nutrients. The cruise track investigates circulation through the Antarctic Circumpolar Current (ACC) and formation of intermediate waters important for upper ocean nutrient supply. The overall circulation/productivity/export/recycling trap of this region also affects how oceanic element-element relationships develop. For Ga, its distribution can provide insight into dust delivery, which recent work has suggested may be higher than previously thought in the study area. Ga's limited reactivity also allows its distribution to be used for water mass deconvolution, which could be usefully applied to the ACC and intermediate water formation regions. Data include dissolved Ga concentrations from bottle and towed fish samples.

cdm_data_type = Other
VARIABLES:
Station_ID (unitless)
Event_ID (unitless)
time (Start_iso_datetime_utc, seconds since 1970-01-01T00:00:00Z)
Start_Date_UTC (unitless)
Start_Time_UTC (unitless)
latitude (Start_latitude, degrees_north)
longitude (Start_longitude, degrees_east)
Rosette_Position (unitless)
Sample_ID (unitless)
depth (Sample_depth, m)
Ga_D_CONC_BOTTLE_hxhmr3 (picomoles per kilogram (pmol/kg))
SD1_Ga_D_CONC_BOTTLE_hxhmr3 (picomoles per kilogram (pmol/kg))
Flag_Ga_D_CONC_BOTTLE_hxhmr3 (unitless)
Ga_D_CONC_FISH_dhewdf (picomoles per kilogram (pmol/kg))
SD1_Ga_D_CONC_FISH_dhewdf (picomoles per kilogram (pmol/kg))
Flag_Ga_D_CONC_FISH_dhewdf (unitless)


[GP17-OCE Dissolved Seawater Barium Concentrations] - Dissolved barium (Ba) concentrations in seawater samples collected on the US GEOTRACES GP17-OCE cruise on R/V Roger Revelle (RR2214) in the South Pacific and Southern Oceans from December 2022 to January 2023 (US GEOTRACES GP17-OCE: Investigating the role of the Southern Ocean's biogeochemical divide in shaping the global distributions of radium and barium isotopes)

This dataset includes measurements of dissolved barium (Ba) concentrations in the South Pacific and Southern Ocean from the US GEOTRACES GP17 section (GP17-OCE, Papeete, Tahiti to Punta Arenas, Chile) on R/V Roger Revelle from December 2022 to January 2023.

cdm_data_type = Other
VARIABLES:
Cruise_ID (unitless)
Station_ID (unitless)
Event_ID (unitless)
GEOTRC_INSTR (unitless)
time (Start_iso_datetime_utc, seconds since 1970-01-01T00:00:00Z)
Start_Date_UTC (unitless)
Start_Time_UTC (unitless)
End_ISO_DateTime_UTC (seconds since 1970-01-01T00:00:00Z)
End_Date_UTC (unitless)
End_Time_UTC (unitless)
latitude (Start_latitude, degrees_north)
longitude (Start_longitude, degrees_east)
End_Latitude (degrees_north)
End_Longitude (degrees_east)
Rosette_Position (unitless)
Sample_ID (unitless)
depth (Sample_depth, m)
Ba_D_CONC_FISH_wtoyqq (nanomoles per kilogram (nmol/kg))
SD1_Ba_D_CONC_FISH_wtoyqq (nanomoles per kilogram (nmol/kg))
Flag_Ba_D_CONC_FISH_wtoyqq (unitless)
Ba_D_CONC_UWAY_ththaj (nanomoles per kilogram (nmol/kg))
SD1_Ba_D_CONC_UWAY_ththaj (nanomoles per kilogram (nmol/kg))
Flag_Ba_D_CONC_UWAY_ththaj (unitless)
Ba_D_CONC_BOTTLE_xhbqq4 (nanomoles per kilogram (nmol/kg))
SD1_Ba_D_CONC_BOTTLE_xhbqq4 (nanomoles per kilogram (nmol/kg))
Flag_Ba_D_CONC_BOTTLE_xhbqq4 (unitless)


[GP17-OCE Dissolved Total and Labile Cobalt] - Dissolved total (dCo) and labile Co (lCo) measurements from the US GEOTRACES GP17-OCE cruise on R/V Roger Revelle (RR2214) in the South Pacific and Southern Oceans from December 2022 to January 2023 (US GEOTRACES GP17 Section: South Pacific and Southern Ocean (GP17-OCE))

Despite the scarcity of cobalt in the global ocean, it plays important roles in some cellular functions, both in its role as a central factor in vitamin B12, and as an inorganic protein cofactor. Consequently, its distribution and speciation in marine environments is an important factor in understanding the activity of marine biota. Dissolved cobalt often displays a 'hybrid' profile type, with biological uptake dominating in the surface waters and removal by scavenging onto particles in the mesopelagic and below. These scavenging processes limit the accumulation of dissolved Co in the deep ocean. The relative contributions of scavenging and surface biological uptake are variable regionally due to both chemical and biological factors: recent research shows that dCo inventories may be intimately tied to the manganese redox cycle and formation of Mn oxides, and thus is heavily influenced by oxygen availability and local microbial community structure. Variability in Co usage - and by extension, its stoichiometry with respect to macronutrients - could be the result of differing uses of and needs for Co-utilizing metalloenzymes between taxa, and the plasticity of individual organisms with regards to metal availability. This dataset includes dissolved total (dCo) and labile Co (lCo) measurements from the GP17-OCE expedition, which occurred from 1 December 2022 to 25 January 2023, and traversed the South Pacific and a portion of the Southern Ocean. dCo samples are UV-irradiated before measurement, and so include both ligand bound and free Co. lCo samples are not UV-irradiated, thus represent the free Co inventory and that which is very weakly bound. lCo can be considered as the more bioavailable fraction. These samples were analyzed using competitive ligand exchange cathodic stripping voltammetry with a hanging mercury drop electrode. The dissolved Co distribution is understudied in much of the ocean, including the Southern Ocean. Given the contribution of the Southern Ocean to global deep water formation, the influences on the dCo inventory in this region likely impact Co supply in all ocean basins.

cdm_data_type = Other
VARIABLES:
Station_ID (unitless)
Event_ID (unitless)
Gear_ID (unitless)
time (Start_iso_datetime_utc, seconds since 1970-01-01T00:00:00Z)
Start_Date_UTC (unitless)
... (23 more variables)


[GP17-OCE Event Log] - Scientific sampling event log from the US GEOTRACES GP17-OCE cruise on R/V Roger Revelle (RR2214) from December 2022 to January 2023 (US GEOTRACES GP17 Section: South Pacific and Southern Ocean (GP17-OCE))

This dataset is the scientific sampling event log from the US GEOTRACES GP17-OCE cruise on R/V Roger Revelle (RR2214). The expedition departed Papeete, Tahiti (French Polynesia) on December 1st, 2022 and arrived in Punta Arenas, Chile on January 25th, 2023. The cruise took place in the South Pacific and Southern Oceans aboard the R/V Roger Revelle with a team of 34 scientists led by Ben Twining (Chief Scientist), Jessica Fitzsimmons, and Greg Cutter (Co-Chief Scientists). GP17 was planned as a two-leg expedition, with its first leg (GP17-OCE) as a southward extension of the 2018 GP15 Alaska-Tahiti expedition and a second leg (GP17-ANT; December 2023-January 2024) into coastal and shelf waters of Antarctica's Amundsen Sea.

cdm_data_type = Other
VARIABLES:
Cruise (unitless)
Event (unitless)
Instrument (unitless)
Action (unitless)
Transect (unitless)
Station (unitless)
Cast (unitless)
latitude (degrees_north)
longitude (degrees_east)
sample_depth_min (m)
sample_depth_max (m)
GEOTRACES_ID_Num_Range (unitless)
Seafloor (meters (m))
Author (unitless)
Comment (unitless)
DateTimeUTC (unitless)
ISO_DateTime_UTC (seconds since 1970-01-01T00:00:00Z)
GPS_Time (seconds since 1970-01-01T00:00:00Z)
Revisions (unitless)


[GP17-OCE GTC Bottle] - Bottle data from CTD profiles from the GTC rosette deployed on the US GEOTRACES GP17-OCE cruise on R/V Roger Revelle (RR2214) from December 2022 to January 2023 (US GEOTRACES GP17 Section: South Pacific and Southern Ocean (GP17-OCE))

This dataset includes the processed bottle data from CTD profiles of the GTC rosette deployed on the US GEOTRACES GP17-OCE cruise on R/V Roger Revelle (RR2214) from December 2022 to January 2023. Data were processed by the Oceanographic Data Facility (ODF) at Scripps Institution of Oceanography. The data include bottle salinity, in addition to CTD measurements (oxygen, salinity, temperature, pressure).

cdm_data_type = Other
VARIABLES:
Cruise (unitless)
EXPOCODE (unitless)
SECT_ID (unitless)
STNNBR (unitless)
Type (unitless)
CASTNO (unitless)
SAMPNO (unitless)
BTLNBR (unitless)
EVENT_NUMBER (unitless)
GEOTRC_SAMPNO (unitless)
time (Iso_datetime_utc, seconds since 1970-01-01T00:00:00Z)
longitude (degrees_east)
latitude (degrees_north)
Bot_Depth (meters (m))
CTDPRS (decibars (db))
QV_WOCECTD_CTDPRS (unitless)
CTDTMP (degrees Celsius)
QV_WOCECTD_CTDTMP (unitless)
CTDSAL (PSU)
QV_WOCECTD_CTDSAL (unitless)
CTDOXY (micromoles per kilogram (umol/kg))
QV_WOCECTD_CTDOXY (unitless)
SALINITY_D_CONC_BOTTLE (PSU)
QV_WOCEBOTTLE_SALNTY (unitless)


[GP17-OCE ODF Bottle] - Bottle data from CTD profiles from the ODF rosette deployed on the US GEOTRACES GP17-OCE cruise on R/V Roger Revelle (RR2214) from December 2022 to January 2023 (US GEOTRACES GP17 Section: South Pacific and Southern Ocean (GP17-OCE))

This dataset includes the processed bottle data from CTD profiles of the ODF rosette deployed on the US GEOTRACES GP17-OCE cruise on R/V Roger Revelle (RR2214) from December 2022 to January 2023. Data were processed by the Oceanographic Data Facility (ODF) at Scripps Institution of Oceanography. The data include bottle salinity and oxygen, in addition to CTD measurements (oxygen, salinity, temperature, pressure).

cdm_data_type = Other
VARIABLES:
Cruise (unitless)
EXPOCODE (unitless)
SECT_ID (unitless)
STNNBR (unitless)
Type (unitless)
CASTNO (unitless)
SAMPNO (unitless)
BTLNBR (unitless)
EVENT_NUMBER (unitless)
GEOTRC_SAMPNO (unitless)
time (Iso_datetime_utc, seconds since 1970-01-01T00:00:00Z)
longitude (degrees_east)
latitude (degrees_north)
Bot_Depth (meters (m))
CTDPRS (decibars (db))
QV_WOCECTD_CTDPRS (unitless)
CTDTMP (degrees Celsius)
QV_WOCECTD_CTDTMP (unitless)
CTDSAL (PSU)
QV_WOCECTD_CTDSAL (unitless)
CTDOXY (micromoles per kilogram (umol/kg))
QV_WOCECTD_CTDOXY (unitless)
SALINITY_D_CONC_BOTTLE (PSU)
... (5 more variables)


[GP17-OCE ODF nutrients] - Nutrients and bottle oxygen measured by the Scripps ODF group on the US GEOTRACES GP17-OCE cruise on R/V Roger Revelle (RR2214) from December 2022 to January 2023 in the South Pacific and Southern Oceans (US GEOTRACES GP17 Section: South Pacific and Southern Ocean (GP17-OCE))

This dataset includes the nutrients and bottle oxygen measurements made by the Ocean Data Facility (ODF) group of  Scripps Institution of Oceanography during the US GEOTRACES GP17-OCE cruise. The cruise took place on R/V Roger Revelle (cruise ID RR2214) from December 2022 to January 2023 in the South Pacific and Southern Oceans.

cdm_data_type = Other
VARIABLES:
EXPOCODE (unitless)
SECT_ID (unitless)
STNNBR (unitless)
CASTNO (unitless)
SAMPNO (unitless)
BTLNBR (unitless)
BTLNBR_FLAG_W (unitless)
EVENT_NUMBER (unitless)
GEOTRC_SAMPNO (unitless)
time (Iso_datetime_utc, seconds since 1970-01-01T00:00:00Z)
DATE (unitless)
time_unitless (Time, unitless)
latitude (degrees_north)
longitude (degrees_east)
depth (m)
REFTMP (degrees Celsius)
REFTMP_FLAG_W (unitless)
BTL_ISO_DateTime_UTC (seconds since 1970-01-01T00:00:00Z)
BTL_DATE (unitless)
BTL_TIME (unitless)
BTL_LAT (degrees_north)
BTL_LON (degrees_east)
CTDPRS (decibars (dbar))
CTDPRS_FLAG_W (unitless)
... (46 more variables)


[GP17-OCE phytoplankton pigments] - Phytoplankton pigment concentrations for samples collected from the upper 200 meters during the GP17-OCE cruise on R/V Roger Revelle (RR2214) in the South Pacific and Southern Oceans from December 2022 to January 2023 (US GEOTRACES GP17 Section: South Pacific and Southern Ocean (GP17-OCE))

This dataset contains phytoplankton pigment concentrations for samples collected from the upper 200 meters at most stations along the GP17-OCE cruise on R/V Roger Revelle (RR2214), from Tahiti south across the Antarctic Circumpolar Current to 67S, then east towards Chile. Samples were collected at the upper-most 4-6 stations, and from surface waters with a towed fish. The expedition took place from December 2022 to January 2023.

cdm_data_type = Other
VARIABLES:
Station_ID (unitless)
Event_ID (unitless)
Gear_ID (unitless)
Start_ISO_DateTime_UTC (seconds since 1970-01-01T00:00:00Z)
Start_Date_UTC (unitless)
Start_Time_UTC (unitless)
End_ISO_DateTime_UTC (seconds since 1970-01-01T00:00:00Z)
End_Date_UTC (unitless)
End_Time_UTC (unitless)
Start_Latitude (degrees_north)
Start_Longitude (degrees_east)
End_Latitude (degrees_north)
End_Longitude (degrees_east)
Rosette_Position (unitless)
Sample_ID (unitless)
depth (Sample_depth, m)
Chl_b_HPLC_TP_CONC_BOTTLE_jpcktv (nanograms per liter (ng/L))
SD1_Chl_b_HPLC_TP_CONC_BOTTLE_jpcktv (nanograms per liter (ng/L))
Flag_Chl_b_HPLC_TP_CONC_BOTTLE_jpcktv (unitless)
Alpha_Car_HPLC_TP_CONC_BOTTLE_a9ppew (nanograms per liter (ng/L))
SD1_Alpha_Car_HPLC_TP_CONC_BOTTLE_a9ppew (nanograms per liter (ng/L))
Flag_Alpha_Car_HPLC_TP_CONC_BOTTLE_a9ppew (unitless)
Perid_HPLC_TP_CONC_BOTTLE_rwxkre (nanograms per liter (ng/L))
... (51 more variables)


[GP17-OCE Underway Net Community Production] - Underway net community production from the US GEOTRACES GP17-OCE cruise on R/V Roger Revelle (RR2214) in the Pacific and Southern Oceans from November 2022 to January 2023 (US GEOTRACES GP17 Section: South Pacific and Southern Ocean (GP17-OCE))

These data include underway temperature, salinity, dissolved oxygen (O2), satellite-derived chlorophyll a and net primary production, and budget-derived net community production (NCP) collected during the US GEOTRACES GP17-OCE cruise from San Diego to Punta Arenas in the Pacific and Southern Oceans. By integrating underway O2 measurements with global O2 data products and satellite data, all components of the surface oxygen budget were constrained, with NCP estimated as the residual term. Our results not only significantly advance understanding of the ocean's biological pump (BP) across diverse biogeochemical regimes but also help validate export estimates from satellite-based productivity algorithms. Since underway O2 data are commonly collected on most research ships, such as during the Global Ship-Based Hydrographic Investigations Program (GO-SHIP), our method for estimating NCP can be applied on a global scale, which contributes to a more comprehensive understanding of the regional variations of the strength of the BP, especially at sub-seasonal time scales.

cdm_data_type = Other
VARIABLES:
time (Date_1day, seconds since 1970-01-01T00:00:00Z)
latitude (Latitude_1day, degrees_north)
Latitude_std_1day (degrees_north)
longitude (Longitude_1day, degrees_east)
Longitude_std_1day (degrees_east)
Station_1day (unitless)
Temperature_1day (degrees Celsius)
Temperature_std_1day (degrees Celsius)
Salinity_1day (PSU)
Salinity_std_1day (PSU)
O2_1day (micromoles per liter (umol L-1))
O2_std_1day (micromoles per liter (umol L-1))
O2_saturation_1day (micromoles per liter (umol L-1))
O2_saturation_std_1day (micromoles per liter (umol L-1))
O2_saturation_anomaly_1day (percent (%))
O2_saturation_anomaly_std_1day (percent (%))
... (22 more variables)


[GP17-OCE Water Column Radium Isotopes] - Measurements of the dissolved isotope radium-226 from samples collected on the US GEOTRACES GP17-OCE cruise on R/V Roger Revelle (RR2214) in the South Pacific and Southern Oceans from December 2022 to January 2023 (US GEOTRACES GP17-OCE: Investigating the role of the Southern Ocean's biogeochemical divide in shaping the global distributions of radium and barium isotopes)

This dataset includes measurements of the dissolved isotope radium-226 in the South Pacific and Southern Ocean. Samples were collected on the US GEOTRACES GP17-OCE cruise (Papeete, Tahiti to Punta Arenas, Chile) on R/V Roger Revelle from December 2022 to January 2023. Radium-223, radium-224, and radium-228 data will be made available in the future.

cdm_data_type = Other
VARIABLES:
Cruise_ID (unitless)
Station_ID (unitless)
GEOTRC_CASTNO (unitless)
GEOTRC_INSTR (unitless)
Start_Date_UTC (unitless)
Start_Time_UTC (unitless)
time (Start_iso_datetime_utc, seconds since 1970-01-01T00:00:00Z)
End_Date_UTC (unitless)
End_Time_UTC (unitless)
End_ISO_DateTime_UTC (seconds since 1970-01-01T00:00:00Z)
latitude (Start_latitude, degrees_north)
longitude (Start_longitude, degrees_east)
End_Latitude (degrees_north)
End_Longitude (degrees_east)
Event_ID (unitless)
Sample_ID (unitless)
depth (Sample_depth, m)
Ra_226_D_CONC_BOTTLE_xuuvtd (milliBecquerels per kilogram (mBq/kg))
SD1_Ra_226_D_CONC_BOTTLE_xuuvtd (milliBecquerels per kilogram (mBq/kg))
Flag_Ra_226_D_CONC_BOTTLE_xuuvtd (unitless)
Ra_226_D_CONC_PUMP_faz5oh (milliBecquerels per kilogram (mBq/kg))
SD1_Ra_226_D_CONC_PUMP_faz5oh (milliBecquerels per kilogram (mBq/kg))
Flag_Ra_226_D_CONC_PUMP_faz5oh (unitless)
Ra_226_D_CONC_UWAY_0nplfd (milliBecquerels per kilogram (mBq/kg))
SD1_Ra_226_D_CONC_UWAY_0nplfd (milliBecquerels per kilogram (mBq/kg))
Flag_Ra_226_D_CONC_UWAY_0nplfd (unitless)


[GP17-OCE Water column total and particulate Th-234] - Water column total and particulate Thorium-234 from the US GEOTRACES GP17-OCE cruise on R/V Roger Revelle (RR2214) in the South Pacific and Southern Oceans from December 2022 to January 2023 (Collaborative Research: US GEOTRACES GP17-OCE and GP17-ANT:  Export and remineralization rates of bioactive and particle reactive trace elements using thorium-234)

This dataset reports water column total Thorium-234 from GP17-OCE (Tahiti, French Polynesia to Punta Arenas, Chile) of the US GEOTRACES cruise on R/V Roger Revelle from December 2022 to January 2023. U-238 from U-salinity relationship was also determined but not reported in this dataset. This data can be made available upon request from the PI and/or dataset contact. Methods are described below.

cdm_data_type = Other
VARIABLES:
Station_ID (unitless)
Event_ID (unitless)
Gear_ID (unitless)
Start_Date_UTC (unitless)
Start_Time_UTC (unitless)
time (Start_iso_datetime_utc, seconds since 1970-01-01T00:00:00Z)
End_Date_UTC (unitless)
End_Time_UTC (unitless)
End_ISO_DateTime_UTC (seconds since 1970-01-01T00:00:00Z)
latitude (Start_latitude, degrees_north)
longitude (Start_longitude, degrees_east)
End_Latitude (degrees_north)
End_Longitude (degrees_east)
Rosette_Position (unitless)
Sample_ID (unitless)
depth (Sample_depth, m)
Th_234_T_CONC_BOTTLE_82mvlk (milliBecquerel per kilogram (mBq/kg))
SD1_Th_234_T_CONC_BOTTLE_82mvlk (milliBecquerel per kilogram (mBq/kg))
Flag_Th_234_T_CONC_BOTTLE_82mvlk (unitless)
Th_234_LPT_CONC_PUMP_cgdpur (milliBecquerel per kilogram (mBq/kg))
SD1_Th_234_LPT_CONC_PUMP_cgdpur (milliBecquerel per kilogram (mBq/kg))
Flag_Th_234_LPT_CONC_PUMP_cgdpur (unitless)
Th_234_SPT_CONC_PUMP_sgquid (milliBecquerel per kilogram (mBq/kg))
SD1_Th_234_SPT_CONC_PUMP_sgquid (milliBecquerel per kilogram (mBq/kg))
Flag_Th_234_SPT_CONC_PUMP_sgquid (unitless)


[GPpr09 Dissolved Th and Pa] - Depth profiles of seawater dissolved 232Th, 230Th, and 231Pa from R/V Sonne cruise SO245 (UltraPac, GPpr09) during Dec 2015 to Jan 2016 (Supply and removal of trace elements in the subtropical South Pacific)

This dataset contains depth profiles of seawater dissolved 232Th, 230Th, and 231Pa from R/V Sonne cruise SO245 (UltraPac, GPpr09).

cdm_data_type = Other
VARIABLES:
Station_ID (unitless)
Start_Date_UTC (unitless)
Start_Time_UTC (unitless)
time (Start ISO Date Time UTC, seconds since 1970-01-01T00:00:00Z)
End_Date_UTC (unitless)
End_Time_UTC (unitless)
End_ISO_DateTime_UTC (End ISO Date Time UTC, unitless)
latitude (degrees_north)
longitude (degrees_east)
End_Latitude (Latitude, degrees North)
End_Longitude (Longitude, degrees East)
Event_ID (unitless)
Sample_ID (unitless)
depth (Sample Depth, m)
Th_230_D_CONC_BOTTLE_tf6m7p (uBq/kg)
SD1_Th_230_D_CONC_BOTTLE_tf6m7p (uBq/kg)
Flag_Th_230_D_CONC_BOTTLE_tf6m7p (unitless)
Th_232_D_CONC_BOTTLE_lffbvx (pmol/kg)
SD1_Th_232_D_CONC_BOTTLE_lffbvx (pmol/kg)
Flag_Th_232_D_CONC_BOTTLE_lffbvx (unitless)
Pa_231_D_CONC_BOTTLE_rrjlxc (uBq/kg)
SD1_Pa_231_D_CONC_BOTTLE_rrjlxc (uBq/kg)
Flag_Pa_231_D_CONC_BOTTLE_rrjlxc (unitless)
Th_230_D_XS_CONC_BOTTLE (uBq/kg)
SD1_Th_230_D_XS_CONC_BOTTLE (uBq/kg)
Flag_Th_230_D_XS_CONC_BOTTLE (unitless)
Pa_231_D_XS_CONC_BOTTLE (uBq/kg)
SD1_Pa_231_D_XS_CONC_BOTTLE (uBq/kg)
Flag_Pa_231_D_XS_CONC_BOTTLE (unitless)


[GPpr09 Particulate Th and Pa] - Depth profiles of seawater particulate 232Th, 230Th, and 231Pa from R/V Sonne cruise SO245 (UltraPac, GPpr09) during Dec 2015 to Jan 2016 (Supply and removal of trace elements in the subtropical South Pacific)

This dataset contains depth profiles of seawater particulate 232Th, 230Th, and 231Pa from R/V Sonne cruise SO245 (UltraPac, GPpr09).

cdm_data_type = Other
VARIABLES:
Station_ID (unitless)
Start_Date_UTC (unitless)
Start_Time_UTC (unitless)
time (Start ISO Date Time UTC, seconds since 1970-01-01T00:00:00Z)
End_Date_UTC (unitless)
End_Time_UTC (unitless)
End_ISO_DateTime_UTC (End ISO Date Time UTC, unitless)
latitude (degrees_north)
longitude (degrees_east)
End_Latitude (Latitude, degrees North)
End_Longitude (Longitude, degrees East)
Event_ID (unitless)
Sample_ID (unitless)
depth (Sample Depth, m)
Th_232_TP_CONC_PUMP_oboqio (pmol/kg)
SD1_Th_232_TP_CONC_PUMP_oboqio (pmol/kg)
Flag_Th_232_TP_CONC_PUMP_oboqio (unitless)
Th_230_TP_CONC_PUMP_e6mfsz (uBq/kg)
SD1_Th_230_TP_CONC_PUMP_e6mfsz (uBq/kg)
Flag_Th_230_TP_CONC_PUMP_e6mfsz (unitless)
Pa_231_TP_CONC_PUMP_r0ifiu (uBq/kg)
SD1_Pa_231_TP_CONC_PUMP_r0ifiu (uBq/kg)
Flag_Pa_231_TP_CONC_PUMP_r0ifiu (unitless)
Th_230_TP_XS_CONC_PUMP (uBq/kg)
SD1_Th_230_TP_XS_CONC_PUMP (uBq/kg)
Flag_Th_230_TP_XS_CONC_PUMP (unitless)
Pa_231_TP_XS_CONC_PUMP (uBq/kg)
SD1_Pa_231_TP_XS_CONC_PUMP (uBq/kg)
Flag_Pa_231_TP_XS_CONC_PUMP (unitless)


[GPS waypoints] - GPS waypoints for habitat complexity photos collected along the Northern Central California coast from 2017 to 2021 (Collaborative Proposal: Selection and Genetic Succession in the Intertidal -- Population Genomics of Pisaster ochraceus During a Wasting Disease Outbreak and its Aftermath)

GPS waypoints for habitat complexity photos collected along the Northern Central California coast from 2017 to 2021.

cdm_data_type = Other
VARIABLES:
wpt_ID (unitless)
latitude (degrees_north)
longitude (degrees_east)
Date (unitless)
time (seconds since 1970-01-01T00:00:00Z)
Site (unitless)
Area (unitless)
GPS_name (unitless)
GPS_ID (unitless)


[Grandparental effects] - Cyprinodon variegatus offspring growth rate in grandparental experiments from specimens wild caught in the Atlantic during 2014 (Beyond maternal effects: Transgenerational plasticity in thermal performance)

Cyprinodon variegatus offspring growth rate in grandparantal experiments from specimens wild caught in the Atlantic during 2014.

cdm_data_type = Other
VARIABLES:
experiment (unitless)
GGP_Temp (degress Celsius)
GGP_T_Day (unitless)
gptemp (degress Celsius)
ptemp (degress Celsius)
otemp (Ocean Temperature, degress Celsius)
Sex (unitless)
Avg_ED (millimeters)
gr (millimeters per day)


[grazing and growth rates] - Protist rates from epifluorescence counts; cyanobacteria rates from flow cytometry; bulk rates from extracted chlorophyll-a from R/V Atlantic Explorer cruises AE1102, AE1118, AE1206, AE1219 in the Sargasso Sea, BATS, 2011-2012 (Plankton Community Composition and Trophic Interactions as Modifiers of Carbon Export in the Sargasso Sea 	)

Protist rates from epifluorescence counts; cyanobacteria rates from flow cytometry; bulk rates from extracted chlorophyll-a from R/V Atlantic Explorer cruises AE1102, AE1118, AE1206, AE1219 in the Sargasso Sea, BATS, 2011-2012.

cdm_data_type = Other
VARIABLES:
cruise_id (dimensionless)
cast (dimensionless)
station (dimensionless)
location_description (dimensionless)
experiment_num (dimensionless)
date (unitless)
latitude (degrees_north)
longitude (degrees_east)
taxon (dimensionless)
depth (m)
u (per day)
g (per day)


[Grazing assays] - Grazing preferences by herbivorous fishes in The Bahamas in 2011 (Mechanisms and Consequences of Fish Biodiversity Loss on Atlantic Coral Reefs Caused by Invasive Pacific Lionfish)

Grazing preferences by herbivorous fishes in The Bahamas in 2011

cdm_data_type = Other
VARIABLES:
date (unitless)
site (unitless)
site_treatment (unitless)
replicate_number (unitless)
replicate_pair (unitless)
observation_time (minutes)
micro_treatment (unitless)
algae_initial (centimeters squared)
algae_pcntCoverChange (Algae Pcnt Cover Change, percent)
family (unitless)
species (unitless)
fish_size (centimeters)
bite_number (count)


[Grazing experiment phytoplankton] - Shipboard grazing experiment phytoplankton data from the mid-Atlantic Bight Shelfbreak on R/V Neil Armstrong cruise AR29, R/V Ronald H. Brown cruise RB1904 and R/V Thomas G. Thompson cruise TN368 in April 2018 and May/July2019 (Collaborative Research:  Shelfbreak Frontal Dynamics: Mechanisms of Upwelling, Net Community Production, and Ecological Implications)

As part of the Shelfbreak Productivity Interdisciplinary Research Operation at the Pioneer Array (SPIROPA) Project, twelve grazing experiments were conducted during each of three research cruises (April of 2018, and May and July of 2019) in the Middle Atlantic Bight to estimate community zooplankton grazing and net phytoplankton growth rates. Stations where the experiments were conducted were strategically located in one of three key cross-shelf water mass regimes: (1) at the shelfbreak front, (2) inshore of the front in continental shelf water and (3) offshore of the front in slope water. Grazing incubations were performed on water sampled from the chlorophyll maximum, when present. The experiments included two "treatments": 1. whole water incubations and incubations on the <200 µm fraction of the plankton commuinity.  All experiments were run in triplicate for 24 hours in flow-thru deck incubators and consisted of a dark treatment incubation and a light treatment incubation at a simulated 30% E0.

cdm_data_type = Other
VARIABLES:
Exp_and_count_no (unitless)
Sample_ID_Number (unitless)
Sample_ID (unitless)
Cruise (unitless)
latitude (degrees_north)
longitude (degrees_east)
Experiment_No (unitless)
Date_Collected (unitless)
Station (unitless)
Depth_M (meters)
Water_Mass_Region (unitless)
Micro_or_WW (unitless)
Treatment_Replicate (unitless)
Date_time_start (unitless)
Date_time_stop (unitless)
delta_t_day (day)
Original_Volume_L (Liters)
... (6 more variables)


[Grazing experiment zooplankton] - Shipboard grazing experiment zooplankton data from the mid-Atlantic Bight Shelfbreak on R/V Neil Armstrong cruise AR29, R/V Ronald H. Brown cruise RB1904 and R/V Thomas G. Thompson cruise TN368 in April 2018 and May/July2019 (Collaborative Research:  Shelfbreak Frontal Dynamics: Mechanisms of Upwelling, Net Community Production, and Ecological Implications)

As part of the Shelfbreak Productivity Interdisciplinary Research Operation at the Pioneer Array (SPIROPA) Project, twelve grazing experiments were conducted during each of three research cruises (April of 2018, and May and July of 2019) in the Middle Atlantic Bight to estimate community zooplankton grazing and net phytoplankton growth rates. Stations where the experiments were conducted were strategically located in one of three key cross-shelf water mass regimes: (1) at the shelfbreak front, (2) inshore of the front in continental shelf water and (3) offshore of the front in slope water. Grazing incubations were performed on water sampled from the chlorophyll maximum, when present. The experiments included two "treatments": 1. whole water incubations and incubations on the <200 µm fraction of the plankton communinity.  All experiments were run in triplicate for 24 hours in flow-thru deck incubators and consisted of a dark treatment incubation and a light treatment incubation at a simulated 30% E0.

cdm_data_type = Other
VARIABLES:
Cruise (unitless)
latitude (degrees_north)
longitude (degrees_east)
Date_Collected (unitless)
Station (unitless)
Depth_M (meters)
Water_Mass_Region (unitless)
Date_time_start (unitless)
Date_time_stop (unitless)
delta_t_day (day)
Experiment_No (unitless)
Treatment (unitless)
Replicate (unitless)
copepod_nauplii (animals/cubic meter)
Oithona_copepodite (animals/cubic meter)
calanoid_copepodite (animals/cubic meter)
Acartia_female (animals/cubic meter)
... (34 more variables)


[Grazing saturation culture experiments using single prey (M.pusilla) and predator (O.danica)] - Flow cytometric counts from grazing saturation culture experiment using single prey (Micromonas pusilla) and predator (Ochromonas danica) (EAGER: A Saturation Approach to Microzooplankton Grazing Rate Determination)

Flow cytometric counts of the picoeukaryote, Micromonas pusilla and 2 um green fluorescent bead abundance (Ochromonas danica was used as the predator) in laboratory-culture experiments to demonstrate the saturation approach.

cdm_data_type = Other
VARIABLES:
Date (unitless)
Experiment (unitless)
Duration (day (d))
Beads_T0 (beads per milliliter (beads/ml))
Micromonas_T0 (cells per milliliter (cells/ml))
Beads_T24 (beads per milliliter (beads/ml))
Micromonas_T24 (cells per milliliter (cells/ml))


[Green Crab Density] - Green crab (Carcinus maenas) density at rocky intertidal sites determined at 8 sites in the Gulf of Maine from April 2019 to December 2021 (Local adaptation and the evolution of plasticity under predator invasion and warming seas: consequences for individuals, populations and communities)

This dataset describes green crab (Carcinus maenas) density at rocky intertidal sites in the northern (4 sites) and southern (4 sites) Gulf of Maine.

cdm_data_type = Other
VARIABLES:
YEAR (unitless)
MONTH (unitless)
REGION (unitless)
SITE_NAME (unitless)
LATITUDE (degrees_north)
longitude (degrees_east)
Green_Crab_Density (number of crabs)


[Greenland experiment: microbial enzymatic activities] - Microbial enzymatic activities from seawater and from particle-associated seawater communities from Greenland, August 2015 (Patterns of activities project) (Latitudinal and depth-related contrasts in enzymatic capabilities of pelagic microbial communities: Predictable patterns in the ocean?)

Bacterial activity as measured by hydrolysis rates from unfiltered seawater and particle-associated communities collected near shore in northeastern Greenland in August 2015.

cdm_data_type = Other
VARIABLES:
trip_id (unitless)
sample_type (unitless)
filter_um (nanomol monomer/liter/hour)
fluorophore (unitless)
station (unitless)
cast (unitless)
depth_id (Depth, unitless)
depth (m)
substrate (unitless)
timepoint (unitless)
time_elapsed_hr (hours)
rep1_rate (nanomol monomer/liter/hour)
rep2_rate (nanomol monomer/liter/hour)
rep3_rate (nanomol monomer/liter/hour)
rate_average (nanomol monomer/liter/hour)
rate_std_dev (nanomol monomer/liter/hour)


[Gridded in-situ oxygen profiles] - Gridded in-situ oxygen profiles from glider deployments in the San Pedro Channel, CA in 2013 and 2014 (Collaborative Research: Use of Triple Oxygen Isotopes and O2/Ar to constrain Net/Gross Oxygen Production during upwelling and non-upwelling periods in a Coastal Setting)

Gridded in-situ oxygen profiles from glider deployments in the San Pedro Channel, CA in 2013 and 2014.

cdm_data_type = Other
VARIABLES:
BINID (unitless)
DATENUM_GMT (unitless)
time (ISO Date Time UTC, seconds since 1970-01-01T00:00:00Z)
YEAR (unitless)
latitude (degrees_north)
longitude (degrees_east)
depth (m)
OXYGEN (millimoles per cubic meter (mmol m^-3))


[Gridded in-situ profiles] - Gridded in-situ profiles from glider deployments in the San Pedro Channel, CA in 2013 and 2014 (Collaborative Research: Use of Triple Oxygen Isotopes and O2/Ar to constrain Net/Gross Oxygen Production during upwelling and non-upwelling periods in a Coastal Setting)

This dataset includes chlorophyll a fluorescence and water temperature from gridded in-situ profiles from a slocum glider deployed between March and July in 2013 and 2014 in the San Pedro Channel, located in the Southern California Bight off the coast of Los Angeles.

cdm_data_type = Other
VARIABLES:
BINID (unitless)
DATENUM_GMT (unitless)
time (ISO Date Time UTC, seconds since 1970-01-01T00:00:00Z)
YEAR (unitless)
latitude (degrees_north)
longitude (degrees_east)
depth (m)
CHL (milligrams per meter cubed (mg/m^3))
TEMP (Temperature, degrees Celsius (C))


[Gross et al.: Pocillopora verrucosa colony growth] - P. verrucosa growth data used to parameterize growth-rate curve (Collaborative Research: Ocean Acidification and Coral Reefs: Scale Dependence and Adaptive Capacity)

P. verrucosa growth data used to parameterize growth-rate curve acquired at the Moorea LTER site, 17.5 S 149.8 W depth 10m between 2011 and 2017

cdm_data_type = Other
VARIABLES:
site (unitless)
ID (unitless)
year (unitless)
d_begin (meter (m))
d_end (meter (m))
coral (proportion)
lat_max (Latitude, decimal degrees)
latitude (degrees_north)
lon_max (Longitude, decimal degrees)
longitude (degrees_east)


[grouper-lionfish refuge competition expt] - Results of lab experiment examining competition for refuge space between invasive lionfish and Nassau grouper; conducted at Lee Stocking Island, Bahamas from 2009-2012 (Lionfish Invasion project) (Ecological Release and Resistance at Sea: Invasion of Atlantic Coral Reefs by Pacific Lionfish)

Results of lab experiment examining competition for refuge space between invasive lionfish and Nassau grouper; conducted at Lee Stocking Island, Bahamas from 2009-2012.

cdm_data_type = Other
VARIABLES:
site (text)
latitude (degrees_north)
longitude (degrees_east)
replicate (integer)
location (code)
target_size_ratio (dimensionless)
actual_size_ratio (dimensionless)
len_lionfish (cm)
len_grouper (cm)
date (unitless)
time2 (Time, HHMM)
lionfish_to_refuge_dist_scaled (cm)
lionfish_to_refuge_dist_actual (cm)
grouper_to_refuge_dist_scaled (cm)
grouper_to_refuge_dist_actual (cm)
lionfish_to_grouper_dist_scaled (cm)
lionfish_to_grouper_dist_actual (cm)
notes_lionfish (text)
notes_grouper (text)


[Groves Creek 'Omits] - Metagenomic, metatranscriptomics and 16S rRNA gene sequence data from diel sampling at Groves Creek Marsh, Skidaway Island, GA during July 2014 (Collaborative Research: Marine priming effect - molecular mechanisms for the biomineralization of terrigenous dissolved organic matter in the ocean)

Groves Creek Marsh (31.972\u00b0 N, 81.028\u00b0 W), a temperate salt marsh fringing Skidaway Island, GA served as the field site for this study. During July 16-17, 2014, samples were collected every two hours and four minutes to evenly sample across two tidal cycles and one diurnal cycle.

cdm_data_type = Other
VARIABLES:
Time_point (unitless)
time (seconds since 1970-01-01T00:00:00Z)
Temperature (degrees Celsius)
depth (m)
Salinity (Sea Water Practical Salinity, parts per thousand (ppt))
Cell_Density (cells per mililiter (cells/mL))
Bacterial_Production (milimole per hour (mmol/h))
DOC (mm)
TDN (mm)
DOC_TDN (unitless)
a254_DOC (unitless)
Lignin (mg 1/ mg OC)
latitude (degrees_north)
longitude (degrees_east)


[Growth - pCO2 x DO effects on Menidia menidia] - Growth data from static and fluctuating pCO2 x dissolved oxygen (DO) experiments on Menidia menidia (Collaborative research: Understanding the effects of acidification and hypoxia within and across generations in a coastal marine fish)

Coastal ecosystems experience substantial natural fluctuations in pCO2 and dissolved oxygen (DO) conditions on diel, tidal, seasonal and interannual timescales. Rising carbon dioxide emissions and anthropogenic nutrient input are expected to increase these pCO2 and DO cycles in severity and duration of acidification and hypoxia. How coastal marine organisms respond to natural pCO2 \u00d7 DO variability and future climate change remains largely unknown. Here, we assess the impact of static and cycling pCO2 \u00d7 DO conditions of various magnitudes and frequencies on early life survival and growth of an important coastal forage fish, Menidia menidia. Static low DO conditions severely decreased embryo survival, larval survival, time to 50% hatch, size at hatch and post-larval growth rates. Static elevated pCO2 did not affect most response traits, however, a synergistic negative effect did occur on embryo survival under hypoxic conditions (3.0 mg L-1). Cycling pCO2 \u00d7 DO, however, reduced these negative effects of static conditions on all response traits with the magnitude of fluctuations influencing the extent of this reduction. This indicates that fluctuations in pCO2 and DO may benefit coastal organisms by providing periodic physiological refuge from stressful conditions, which could promote species adaptability to climate change.

cdm_data_type = Other
VARIABLES:
Experiment (unitless)
Treatment (unitless)
Cycling_pattern (unitless)
Tank_No (unitless)
Hatch_length (millimeters (mm))
Hatch_length_SE (millimeters (mm))
Mean_growth_rate (millimeters per day (mm day-1))
Mean_growth_rate_SE (millimeters per day (mm day-1))


[Growth and mortality] - Growth and mortality of corals on long-term monitoring sites in St. John, USVI. (LTREB Long-term coral reef community dynamics in St. John, USVI: 1987-2019)

Growth and mortality of corals on long-term monitoring sites in St. John, USVI.

cdm_data_type = Other
VARIABLES:
tag_number (unitless)
coral_taxon (unitless)
years_1996_1997 (millimeter per year)
years_1997_1998 (millimeter per year)
years_1998_1999 (millimeter per year)
years_1999_2000 (millimeter per year)
years_2000_2001 (millimeter per year)
years_2001_2002 (millimeter per year)
years_2002_2003 (millimeter per year)
years_2003_2003 (millimeter per year)
years_2004_2005 (millimeter per year)
years_2005_2006 (millimeter per year)
years_2006_2007 (millimeter per year)
years_2007_2008 (millimeter per year)
years_2008_2009 (millimeter per year)
years_2009_2010 (millimeter per year)
years_2010_2011 (millimeter per year)
years_2011_2012 (millimeter per year)
years_2012_2013 (millimeter per year)
years_2013_2014 (millimeter per year)
years_2014_2015 (millimeter per year)


[growth phase exopolymers] - Experimental results: Exopolymer and carbohydrate production by diatoms with growth; conducted at the Thornton lab, TAMU from 2007-2012 (Diatom EPS Production project) (Effect of Temperature on Extracellular Polymeric Substance Production (EPS) by Diatoms)

Data from laboratory experiment on exopolymer and carbohydrate production by
the diatoms Thalassiosira weissflogii (CCMP 1051), Skeletonema marinoi (CCMP
1332), and Cylindrotheca closterium (CCMP 339) during the growth to death
phases of the cultures.

Related references:
 Chen, J. 2014. Factors affecting carbohydrate production and the formation
of transparent exopolymer particles (TEP) by diatoms. Ph.D. dissertation,
Texas A&M University, College Station, TX.

cdm_data_type = Other
VARIABLES:
species (dimensionless)
growth_phase (dimensionless)
day (dimensionless)
culture (dimensionless)
cell_abundance (cells per milliliter (mL-1))
cell_vol_mean (cubic micrometers (um^3))
chla (Concentration Of Chlorophyll In Sea Water, micrograms per liter (ug L-1))
chla_per_cell (Concentration Of Chlorophyll In Sea Water, picograms per cell (pg cell-1))
chla_per_cell_vol (Concentration Of Chlorophyll In Sea Water, femtograms per cubic micrometer (fg um-3))
tot_carb (micrograms per milliliter (ug mL-1))
tot_carb_per_cell (picograms per cell (pg cell-1))
tot_carb_per_cell_vol (femtograms per cubic micrometer (fg um-3))
colloidal_carb (micrograms per milliliter (ug mL-1))
collodial_per_cell (picograms per cell (pg cell-1))
colloidal_per_cell_vol (femtograms per cubic micrometer (fg um-3))
EPS_carb (micrograms per milliliter (ug mL-1))
EPS_carb_per_cell (picograms per cell (pg cell-1))
EPS_carb_per_cell_vol (femtograms per cubic micrometer (fg um-3))
HW_carb (micrograms per milliliter (ug mL-1))
... (21 more variables)


[Growth rate of Pleurochrysis carterae] - Experimental data on growth rates of Pleurochrysis carterae analyzed at Bigelow Laboratory from 2013. (OA Copes Coccoliths project) (Effects of ocean acidification on Emiliania huxleyi and Calanus finmarchicus; insights into the oceanic alkalinity and biological carbon pumps)

Experimental data on growth rates of Pleurochrysis carterae analyzed at Bigelow Laboratory from 2013. (OA Copes Coccoliths project)

cdm_data_type = Other
VARIABLES:
pCO2_treatment (P CO2 Treatment, ppm)
day (unitless)
growth_cycle (unitless)
cell_density (cell per milliliter cells/mL)
ln_cellDensity (Ln Cell Density, ln(cells/mL))
linest_slope ((ln(cells/mL))/day)
linest_intercept (unitless)
growthRate (Growth Rate, u/day)
mean_growthRate (Mean Growth Rate, u/day)
stdev_growthRate (Stdev Growth Rate, day-1)


[Growth rates - evolution expt] - Daily growth rates of 8 populations of Chaetoceros simplex grown at 31C with control population at 25C, in regular L1 medium (884 µm NO3-) (Dimensions: Collaborative Research: Genetic, functional and phylogenetic diversity determines marine phytoplankton community responses to changing temperature and nutrients)

Daily growth rates of 8 populations of Chaetoceros simplex grown at 31C and control population at 25C, in regular L1 medium (884 \u03bcm NO3\u2212) or nitrogen\u2010reduced L1 medium (5 \u03bcm NO3\u2212).

cdm_data_type = Other
VARIABLES:
Evol_strain (unitless)
period (unitless)
Temperature (Celsius degrees)
Nitrate_Concentration (Micromolar)
Replicate (unitless)
Growth_rate (day-1)


[Growth rates and bulk isotope values] - Growth rates, bulk isotope values, elemental composition data from the R/V Meteor M77 cruise in the Peruvian ocean margin from November to December 2008. (The Use of Nitrogen Isotopes of Amino Acids To Understand Marine Sedimentary 15N Records)

Growth rates, bulk isotope values, elemental composition data from the R/V Meteor M77 cruise in the Peruvian ocean margin from November to December 2008.

cdm_data_type = Other
VARIABLES:
Treatment_ID (unitless)
Growth_rate (days)
Cell_density (cells per milliliter)
Cell_size (microns)
Bulk_stable_isotope_d13C (Bulk Stable Isotope D13 C, per mil)
Bulk_stable_isotope_d15N (Bulk Stable Isotope D15 N, per mil)
elemental_composition_C (percent)
elemental_composition_N (percent)
elemental_composition_C_N_atomic (percent)


[Growth rates of Line P diatoms in added Zn and Co incubation studies] - Growth rates NE Pacific and Atlantic diatom isolates under various Zn and Co additions in experiments with cultures collected from R/V Thomas G. Thompson cruise TN280, along Line P in the NE Pacific, in May of 2012. (US GEOTRACES PMT: Cobalt Biogeochemical Cycling and Connections to Metalloenzymes in the Pacific Ocean)

Growth rates of two NE Pacific Line P diatom isolates and two Atlantic diatom isolates under various Zn and Co additions. Cultures were collected from the GeoMICS expedition on the R/V Thomas G. Thompson (cruise TN280), along Line P in the NE Pacific, in May of 2012.

cdm_data_type = Other
VARIABLES:
Culture (unitless)
Experiment_Type (unitless)
Added_Zn (nanomoles per liter (nmol/L))
Added_Co (nanomoles per liter (nmol/L))
Total_Zn (nanomoles per liter (nmol/L))
Total_Co (nanomoles per liter (nmol/L))
log_Zn2plus (moles per liter (mol/L))
log_Co2plus (moles per liter (mol/L))
Growth_rate_replicate_A (per day (d-1))
Growth_rate_replicate_B (per day (d-1))
Growth_rate_average (per day (d-1))
Maximum_RFU (Relative Fluorescence Units (RFU))


[GS02 Beryllium-7 in seawater and aerosols] - Aerosol and seawater beryllium-7 concentrations from the French GEOTRACES GS02 SWINGS cruise aboard R/V Marion-Dufresne (MD229) from January to March 2021 (Collaborative Research: Quantifying the atmospheric flux of bio-active trace elements to the southwestern Indian Ocean)

Beryllium-7, a cosmogenic radioactive isotope with a half-life of 53.3 days, is formed in the atmosphere, attaches to aerosol particles, and is deposited on the earth's surface through wet and dry processes. In this project, we measured Be-7 concentrations in aerosol particles and in seawater samples (depths < 200 meters) collected on the French GEOTRACES section GS02 SWINGS cruise aboard R/V Marion-Dufresne. The cruise originated at Réunion Island on 11 January 2021 and concluded at Réunion on 8 March 2021. Nineteen aerosol samples and seawater from eleven stations in the South Indian Ocean were collected. The dataset will be used to study the deposition of trace elements and isotopes (TEIs) and upper ocean mixing processes. Aerosol deposition is an important source of TE micronutrients to open ocean areas that are far removed from riverine sources. But, while the collection aerosol of samples for TEI analysis is straightforward, estimating the deposition flux also requires an appropriate deposition velocity (i.e. deposition flux is the product of the aerosol concentration and deposition velocity). Because Be-7 is supplied to the open ocean exclusively through aerosol deposition and it is removed through radioactive decay, the water column inventory and aerosol concentration of Be-7 can be used to derive the deposition velocity applicable to aerosol TEIs.

cdm_data_type = Other
VARIABLES:
Station_ID (unitless)
Event_ID (unitless)
Start_Date_UTC (unitless)
Start_Time_UTC (unitless)
time (Start_iso_datetime_utc, seconds since 1970-01-01T00:00:00Z)
End_Date_UTC (unitless)
End_Time_UTC (unitless)
End_ISO_DateTime_UTC (seconds since 1970-01-01T00:00:00Z)
latitude (Start_latitude, degrees_north)
longitude (Start_longitude, degrees_east)
End_Latitude (degrees_north)
End_Longitude (degrees_east)
Sample_ID (unitless)
... (7 more variables)