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   set  data   graph     files  public Depth profiles of seawater dissolved 232Th, 230Th, and 231Pa from R/V Sonne cruise
SO245 (UltraPac, GPpr09) during Dec 2015 to Jan 2016 		   ?     I   M   background (external link) RSS Subscribe BCO-DMO bcodmo_dataset_813133

The Dataset's Variables and Attributes

Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL access_formats String .htmlTable,.csv,.json,.mat,.nc,.tsv,.esriCsv,.geoJson,.odvTxt
attribute NC_GLOBAL acquisition_description String Dissolved data:
Water samples were collected with a Sea-Bird Electronics CTD carousel fitted
with 24 12-liter PVC Niskin bottles.The carousel was lowered from the ship
with steel wire. Niskin bottles were equipped with nylon-coated closure
springs and Viton O-rings. After collection seawater was drained with Teflon-
lined TygonTM tubing and filtered through Pall AcropakTM 500 filters on deck
(gravity filtration, 0.8/0.45 \u03bcm pore size) into Fisher I-Chem series 300
LDPE cubitainers. Approximately 10L was collected per desired depth. Prior to
the cruise, the tubing, filters, and cubitainers were cleaned by immersion in
1.2 M HCl (Fisher Scientific Trace Metal Grade) for 4-5 days. Once filtered,
samples were adjusted to a pH ~2 with ultra-clean 6 M HCl (Fisher Scientific
OPTIMA grade), double-bagged, stored in pallet boxes on-deck until the end of
the cruise and then at room temperature once shipped to the participating
laboratories analysis.

Analytical methods for dissolved radionuclides:
In the on-shore laboratory, ~5L of seawater was transferred into a new acid-
cleaned cubitainer, weighed to determine sample size, taking into account the
weight of the cubitainer and of the acid added at sea. Then weighed aliquots
of the artificial isotope yield monitors 229Th (20 pg) and 233Pa (0.5 pg) and
15 mg dissolved Fe were added to each sample. After allowing 1 day for spike
equilibration, the pH of each sample was raised to 8.3-8.7 by adding ~12 mL of
concentrated NH4OH (Fisher Scientific OPTIMA grade) which caused iron
(oxy)hydroxide precipitates to form. Each sample cubitainer was fitted with a
nozzle cap, inverted, and the Fe precipitate was allowed to settle for 2 days.
After 2 days, the nozzle caps were opened and the pH~8.3-8.7 water was slowly
drained, leaving only the iron oxyhydroxide precipitate and 250-500mL of
water. The Fe precipitate was transferred to centrifuge tubes for
centrifugation and rinsing with Milli-Q H2O (>18 M\u03a9) to remove the major
seawater ions. The precipitate was then dissolved in 16 M HNO3 (Fisher
Scientific OPTIMA grade) and transferred to a Teflon beaker for a high-
temperature (180-200\u00b0C) digestion with HClO4 and HF (Fisher Scientific
OPTIMA grade) on a hotplate in a HEPA-filtered laminar flow hood. After total
dissolution of the sample, another precipitation of iron (oxy)hydroxide
followed and the precipitate was washed with Mill-Q H2O, centrifuged, and
dissolved in 12 M HCl for a series of anion-exchange chromatography using 6 mL
polypropylene columns each containing a 1 mL bed of Bio-rad resin (AG1-X8,
100-200 mesh size) and a 45 \u03bcm porous polyethylene frit (Anderson et al.
2012). The final column elutions were dried down at 180\u00b0C in the presence
of 2 drops of HClO4 and taken up in approximately 1 mL of 0.16 M HNO3/0.026 M
HF for mass spectrometric analysis.

Concentrations of 232Th, 230Th, and 231Pa were calculated by isotope dilution,
relative to the calibrated tracers 229Th and 233Pa added at the beginning of
sample processing. Analyses were carried out on a Thermo-Finnegan ELEMENT XR
Single Collector Magnetic Sector ICP-MS, equipped with a high-performance
Interface pump (Jet Pump), and specially-designed sample (X) and skimmer (Jet)
cones to ensure the highest possible sensitivity. All measurements were made
in low-resolution mode (\u2206m/M\u2248300), peak jumping in Escan mode across
the central 5% of the flat-topped peaks. Measurements were made on a
MasCom\u2122 SEM; 229Th, 230Th,231Pa, and 233Pa were measured in Counting
mode, while the 232Th signals were large enough that they were measured in
Analog mode. Two solutions of SRM129, a natural U standard, were run multiple
times throughout each run. One solution was in a concentration range where
238U and 235U were both measured in counting mode, allowing us to determine
the mass bias/amu (typical values varied from -0.01/amu to 0.03/amu). In the
other, more concentrated solution, 238U was measured in Analog mode and 235U
was measured in Counting mode, yielding a measurement of the Analog/Counting
Correction Factor. These corrections assume that the mass bias and Analog
Correction Factor measured on U isotopes can be applied to Th and Pa isotope
measurements. Each sample measurement was bracketed by measurement of an
aliquot of the run solution, used to correct for the instrumental background
count rates. To correct for tailing of 232Th into the minor Th and Pa
isotopes, a series of 232Th standards were run at concentrations bracketing
the expected 232Th concentrations in the samples. The analysis routine for
these standards was identical to the analysis routine for samples, so we could
see the changing beam intensities at the minor masses as we increased the
concentration of the 232Th standards. The 232Th count rates in our Pa
fractions are quite small, reflecting mainly reagent blanks, compared to the
232Th signal intensity in the Th fraction. The regressions of 230Th, 231Pa,
and 233Pa signals as a function of the 232Th signal in the standards was used
to correct for tailing of 232Th in samples.

Water samples were analyzed in batches of 15. Procedural blanks were
determined by processing two 4-5 L of Milli-Q water in an acid-cleaned
cubitainer acidified to pH ~2 with 6 M HCl as a sample in each batch. An
aliquot of two intercalibrated working standard solutions of 232Th, 230Th and
231Pa, SW STD 2010-1 referred to by Anderson et al. (2012) and SW STD 2015-1
which has lower 232Th activity (more similar to Pacific seawater conditions),
were also processed like a sample in each batch. Samples were corrected using
the pooled average of all procedural blanks run during processing of SO245
samples. The average procedural blanks for 232Th, 230Th, and 231Pa were about
7 pg, 0.5 fg, and 0.03 fg respectively.

Derived parameters:
Th_230_D_XS_CONC_BOTTLE \- The dissolved excess Th-230 concentration refers to
the measured dissolved Th-230 corrected for a contribution of Th-230 due to
the partial dissolution of uranium-bearing minerals, or lithogenics. Thereby
the dissolved excess represents solely the fraction of Th-230 produced in the
water by decay of dissolved uranium-234. We estimate the lithogenic Th-230
using measuring dissolved Th-232 and a lithogenic Th-230/Th-232 ratio of
4.0e-6 (atom ratio) as determined by Roy-Barman et al. (2002) and a conversion
factor to convert picomoles to micro-Becquerels.

Th_230_D_XS_CONC_BOTTLE = Th_230_D_CONC_BOTTLE \u2013 4.0e-6 *1.7473e5 *
Th_232_D_CONC_BOTTLE

Pa_231_D_XS_CONC_BOTTLE \- The dissolved excess Pa-231 concentration refers to
the measured dissolved Pa-231 corrected for a contribution of Pa-231 due to
the partial dissolution of uranium-bearing minerals, or lithogenics. Thereby
the dissolved excess represents solely the fraction of Pa-231 produced in the
water by decay of dissolved uranium-235. We estimate the lithogenic Pa-231
using measuring dissolved Th-232 and a lithogenic Pa-231/Th-232 ratio of
8.8e-8 (atom ratio) which is derived from assuming an average upper
continental crustal U/Th ratio (Taylor and McClennan, 1995) and secular
equilibrium between Pa-231 and U-235 in the lithogenic material. An additional
conversion factor is needed to convert picomoles to micro-Becquerels.

Pa_231_D_XS_CONC_BOTTLE = Pa_231_D_CONC_BOTTLE \u2013 8.8e-8 * 4.0370e5 *
Th_232_D_CONC_BOTTLE

The correction for dissolved 231Pa and 230Th derived from dissolution of
lithogenic particles, when calculating xs230Th\u00a0 and xs231Pa\u00a0 is
small. Therefore, even for a sample where the 232Th, used to make the
correction, is flagged as bad, the error contributed in calculating
xs230Th\u00a0and xs231Pa is small, so they are flagged as questionable (2).
See the Processing Description for complete\u00a0quality flag definitions.
attribute NC_GLOBAL awards_0_award_nid String 810770
attribute NC_GLOBAL awards_0_award_number String OCE-1555726
attribute NC_GLOBAL awards_0_data_url String http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1555726 (external link)
attribute NC_GLOBAL awards_0_funder_name String NSF Division of Ocean Sciences
attribute NC_GLOBAL awards_0_funding_acronym String NSF OCE
attribute NC_GLOBAL awards_0_funding_source_nid String 355
attribute NC_GLOBAL awards_0_program_manager String Henrietta N Edmonds
attribute NC_GLOBAL awards_0_program_manager_nid String 51517
attribute NC_GLOBAL cdm_data_type String Other
attribute NC_GLOBAL comment String Depth profiles of seawater dissolved 232Th, 230Th, and 231Pa
from R/V Sonne cruise SO245 (UltraPac, GPpr09)
PI: Robert F. Anderson (LDEO)
Co-PI: Martin Q. Fleisher (LDEO)
Contact: Frank J. Pavia (LDEO)
Version date: 03 June 2020
attribute NC_GLOBAL Conventions String COARDS, CF-1.6, ACDD-1.3
attribute NC_GLOBAL creator_email String info at bco-dmo.org
attribute NC_GLOBAL creator_name String BCO-DMO
attribute NC_GLOBAL creator_type String institution
attribute NC_GLOBAL creator_url String https://www.bco-dmo.org/ (external link)
attribute NC_GLOBAL data_source String extract_data_as_tsv version 2.3 19 Dec 2019
attribute NC_GLOBAL dataset_current_state String Final and no updates
attribute NC_GLOBAL date_created String 2020-05-27T20:19:10Z
attribute NC_GLOBAL date_modified String 2020-06-04T20:08:16Z
attribute NC_GLOBAL defaultDataQuery String &time<now
attribute NC_GLOBAL doi String 10.26008/1912/bco-dmo.813133.1
attribute NC_GLOBAL Easternmost_Easting double -84.930117
attribute NC_GLOBAL geospatial_lat_max double -23.5001
attribute NC_GLOBAL geospatial_lat_min double -39.310683
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double -84.930117
attribute NC_GLOBAL geospatial_lon_min double -169.927017
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL geospatial_vertical_max double 5231.51
attribute NC_GLOBAL geospatial_vertical_min double 9.46
attribute NC_GLOBAL geospatial_vertical_positive String down
attribute NC_GLOBAL geospatial_vertical_units String m
attribute NC_GLOBAL infoUrl String https://www.bco-dmo.org/dataset/813133 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL instruments_0_acronym String Niskin bottle
attribute NC_GLOBAL instruments_0_dataset_instrument_nid String 813207
attribute NC_GLOBAL instruments_0_description String A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24, or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc.
attribute NC_GLOBAL instruments_0_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/ (external link)
attribute NC_GLOBAL instruments_0_instrument_name String Niskin bottle
attribute NC_GLOBAL instruments_0_instrument_nid String 413
attribute NC_GLOBAL instruments_0_supplied_name String 12-liter PVC Niskin bottles
attribute NC_GLOBAL instruments_1_acronym String CTD Sea-Bird
attribute NC_GLOBAL instruments_1_dataset_instrument_nid String 813206
attribute NC_GLOBAL instruments_1_description String Conductivity, Temperature, Depth (CTD) sensor package from SeaBird Electronics, no specific unit identified. This instrument designation is used when specific make and model are not known. See also other SeaBird instruments listed under CTD. More information from Sea-Bird Electronics.
attribute NC_GLOBAL instruments_1_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L05/current/130/ (external link)
attribute NC_GLOBAL instruments_1_instrument_name String CTD Sea-Bird
attribute NC_GLOBAL instruments_1_instrument_nid String 447
attribute NC_GLOBAL instruments_1_supplied_name String Sea-Bird Electronics CTD
attribute NC_GLOBAL instruments_2_acronym String ICP Mass Spec
attribute NC_GLOBAL instruments_2_dataset_instrument_nid String 813209
attribute NC_GLOBAL instruments_2_description String An ICP Mass Spec is an instrument that passes nebulized samples into an inductively-coupled gas plasma (8-10000 K) where they are atomized and ionized. Ions of specific mass-to-charge ratios are quantified in a quadrupole mass spectrometer.
attribute NC_GLOBAL instruments_2_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L05/current/LAB15/ (external link)
attribute NC_GLOBAL instruments_2_instrument_name String Inductively Coupled Plasma Mass Spectrometer
attribute NC_GLOBAL instruments_2_instrument_nid String 530
attribute NC_GLOBAL instruments_2_supplied_name String Thermo-Finnegan ELEMENT XR Single Collector Magnetic Sector ICP-MS
attribute NC_GLOBAL instruments_3_dataset_instrument_nid String 813208
attribute NC_GLOBAL instruments_3_description String A machine with a rapidly rotating container that applies centrifugal force to its contents, typically to separate fluids of different densities (e.g., cream from milk) or liquids from solids.
attribute NC_GLOBAL instruments_3_instrument_name String Centrifuge
attribute NC_GLOBAL instruments_3_instrument_nid String 629890
attribute NC_GLOBAL keywords String bco, bco-dmo, biological, bottle, chemical, conc, data, dataset, date, depth, dmo, end, End_Date_UTC, End_ISO_DateTime_UTC, End_Latitude, End_Longitude, End_Time_UTC, erddap, event, Event_ID, flag, Flag_Pa_231_D_CONC_BOTTLE_rrjlxc, Flag_Pa_231_D_XS_CONC_BOTTLE, Flag_Th_230_D_CONC_BOTTLE_tf6m7p, Flag_Th_230_D_XS_CONC_BOTTLE, Flag_Th_232_D_CONC_BOTTLE_lffbvx, iso, latitude, lffbvx, longitude, management, oceanography, office, Pa_231_D_CONC_BOTTLE_rrjlxc, Pa_231_D_XS_CONC_BOTTLE, preliminary, rrjlxc, sample, Sample_Depth, Sample_ID, sd1, SD1_Pa_231_D_CONC_BOTTLE_rrjlxc, SD1_Pa_231_D_XS_CONC_BOTTLE, SD1_Th_230_D_CONC_BOTTLE_tf6m7p, SD1_Th_230_D_XS_CONC_BOTTLE, SD1_Th_232_D_CONC_BOTTLE_lffbvx, start, Start_Date_UTC, Start_Time_UTC, station, Station_ID, tf6m7p, Th_230_D_CONC_BOTTLE_tf6m7p, Th_230_D_XS_CONC_BOTTLE, Th_232_D_CONC_BOTTLE_lffbvx, time
attribute NC_GLOBAL license String https://www.bco-dmo.org/dataset/813133/license (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/813133 (external link)
attribute NC_GLOBAL Northernmost_Northing double -23.5001
attribute NC_GLOBAL param_mapping String {'813133': {'Start_ISO_DateTime_UTC': 'flag - time', 'Sample_Depth': 'flag - depth', 'Start_Longitude': 'flag - longitude', 'Start_Latitude': 'flag - latitude'}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/813133/parameters (external link)
attribute NC_GLOBAL people_0_affiliation String Lamont-Doherty Earth Observatory
attribute NC_GLOBAL people_0_affiliation_acronym String LDEO
attribute NC_GLOBAL people_0_person_name String Robert F. Anderson
attribute NC_GLOBAL people_0_person_nid String 50572
attribute NC_GLOBAL people_0_role String Principal Investigator
attribute NC_GLOBAL people_0_role_type String originator
attribute NC_GLOBAL people_1_affiliation String Lamont-Doherty Earth Observatory
attribute NC_GLOBAL people_1_affiliation_acronym String LDEO
attribute NC_GLOBAL people_1_person_name String Martin Q. Fleisher
attribute NC_GLOBAL people_1_person_nid String 51612
attribute NC_GLOBAL people_1_role String Co-Principal Investigator
attribute NC_GLOBAL people_1_role_type String originator
attribute NC_GLOBAL people_2_affiliation String Lamont-Doherty Earth Observatory
attribute NC_GLOBAL people_2_affiliation_acronym String LDEO
attribute NC_GLOBAL people_2_person_name String Frank J. Pavia
attribute NC_GLOBAL people_2_person_nid String 643657
attribute NC_GLOBAL people_2_role String Contact
attribute NC_GLOBAL people_2_role_type String related
attribute NC_GLOBAL people_3_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_3_affiliation_acronym String WHOI BCO-DMO
attribute NC_GLOBAL people_3_person_name String Shannon Rauch
attribute NC_GLOBAL people_3_person_nid String 51498
attribute NC_GLOBAL people_3_role String BCO-DMO Data Manager
attribute NC_GLOBAL people_3_role_type String related
attribute NC_GLOBAL project String UltraPac Trace Elements
attribute NC_GLOBAL projects_0_acronym String UltraPac Trace Elements
attribute NC_GLOBAL projects_0_description String NSF Award Abstract:
With funding from this RAPID award, an American research team at the Lamont-Doherty Earth Observatory of Columbia University will study the supply and removal of trace elements in the South Pacific Subtropical Gyre (SPSG). This will be done in the context of an international program (UltraPac) under the direction of Dr. Tim Ferdelman of the Max Planck Institute in Breman, Germany, who has invited the Lamont-Doherty team to join the German scientists aboard their expedition on the Research Vessel Sonne (December 2015 - January 2016) between Antofagasta, Chile and Wellington, New Zealand. UltraPac is a coordinated interdisciplinary study of the SPSG, including research on microbiology, molecular biology, zooplankton, aerosols, trace metals, nitrogen fixation, carbon and nutrient biogeochemistry, among other topics. The American team will measure dissolved and particulate concentrations of long-lived, naturally-occurring radioisotopes in the uranium and thorium decay series that can be used to provide constraints on the rates of supply and removal of trace elements within this regime. The project will also provide education, training and professional development for two PhD students that would otherwise be unavailable through other aspects of their PhD research. It will also provide an opportunity for the students to network with foreign collaborators, which will be very beneficial to their long-term career development.
This project will enable the Lamont-Doherty scientists to quantify the rates of supply and removal of trace elements in the severely undersampled SPSG, the ocean's largest biogeographic province, characterized by a hyper-oligotrophic (low biological productivity) ecosystem and ultra-low dust fluxes. Evaluating the supply of trace elements from dust provides critical information about sources of essential micronutrients that influence the ecology and biogeochemistry of the SPSG. The award will cover the travel expenses for two people to participate in the cruise, shipping to and from the cruise, and instrument fees to analyze samples collected on the cruise. Comparing scavenging results from the SPSG with results from recent studies of other biogeographic providences, including the North Pacific Subtropical Gyre, the Subarctic North Pacific, the North Atlantic Subtropical Gyre and the Eastern Tropical South Pacific, will build toward the team's long-range goal of characterizing the intensity of trace element removal from the ocean in terms of environmental, ecological and biogeochemical characteristics of ocean biogeographic provinces. The deep water column of the SPSG is influenced by the hydrothermal plume emanating from the East Pacific Rise. Comparing SPSG results with those from regions lacking significant influence by hydrothermal plumes will also enable them to constrain the role of these plumes in defining the global distribution of trace elements in the deep ocean. This effort should provide rates of supply and removal of biologically essential micronutrients, and of other trace elements, in an end-member ocean regime that is not scheduled for sampling by a GEOTRACES ocean section, thus filling a gap in the global database for trace elements and isotopes under development by GEOTRACES. Results will be obtained using GEOTRACES-compliant methods, and made available through the GEOTRACES database for use by investigators in other fields.
attribute NC_GLOBAL projects_0_end_date String 2016-09
attribute NC_GLOBAL projects_0_geolocation String South Pacific Gyre between Peru and Tahiti
attribute NC_GLOBAL projects_0_name String Supply and removal of trace elements in the subtropical South Pacific
attribute NC_GLOBAL projects_0_project_nid String 810771
attribute NC_GLOBAL projects_0_start_date String 2015-10
attribute NC_GLOBAL publisher_name String Biological and Chemical Oceanographic Data Management Office (BCO-DMO)
attribute NC_GLOBAL publisher_type String institution
attribute NC_GLOBAL sourceUrl String (local files)
attribute NC_GLOBAL Southernmost_Northing double -39.310683
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v55
attribute NC_GLOBAL subsetVariables String Flag_Th_230_D_CONC_BOTTLE_tf6m7p,Flag_Th_232_D_CONC_BOTTLE_lffbvx,Flag_Pa_231_D_CONC_BOTTLE_rrjlxc,Flag_Th_230_D_XS_CONC_BOTTLE,Flag_Pa_231_D_XS_CONC_BOTTLE
attribute NC_GLOBAL summary String This dataset contains depth profiles of seawater dissolved 232Th, 230Th, and 231Pa from R/V Sonne cruise SO245 (UltraPac, GPpr09).
attribute NC_GLOBAL time_coverage_end String 2016-01-23T09:24Z
attribute NC_GLOBAL time_coverage_start String 2015-12-27T03:29Z
attribute NC_GLOBAL title String Depth profiles of seawater dissolved 232Th, 230Th, and 231Pa from R/V Sonne cruise SO245 (UltraPac, GPpr09) during Dec 2015 to Jan 2016
attribute NC_GLOBAL version String 1
attribute NC_GLOBAL Westernmost_Easting double -169.927017
attribute NC_GLOBAL xml_source String osprey2erddap.update_xml() v1.5
variable Station_ID   byte  
attribute Station_ID _FillValue byte 127
attribute Station_ID actual_range byte 2, 15
attribute Station_ID bcodmo_name String station
attribute Station_ID description String Station number
attribute Station_ID long_name String Station ID
attribute Station_ID units String unitless
variable Start_Date_UTC   String  
attribute Start_Date_UTC bcodmo_name String date
attribute Start_Date_UTC description String Start date (UTC); format: DD/MM/YYYY
attribute Start_Date_UTC long_name String Start Date UTC
attribute Start_Date_UTC nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/ (external link)
attribute Start_Date_UTC time_precision String 1970-01-01
attribute Start_Date_UTC units String unitless
variable Start_Time_UTC   String  
attribute Start_Time_UTC bcodmo_name String time
attribute Start_Time_UTC description String Start time (UTC); format: hh:mm
attribute Start_Time_UTC long_name String Start Time UTC
attribute Start_Time_UTC nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/AHMSAA01/ (external link)
attribute Start_Time_UTC units String unitless
variable time   double  
attribute time _CoordinateAxisType String Time
attribute time actual_range double 1.45118694E9, 1.45354104E9
attribute time axis String T
attribute time bcodmo_name String ISO_DateTime_UTC
attribute time description String Start date and time (UTC) formatted to ISO8601 standard: YYYY-MM-DDThh:mmZ
attribute time ioos_category String Time
attribute time long_name String Start ISO Date Time UTC
attribute time nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/DTUT8601/ (external link)
attribute time source_name String Start_ISO_DateTime_UTC
attribute time standard_name String time
attribute time time_origin String 01-JAN-1970 00:00:00
attribute time time_precision String 1970-01-01T00:00Z
attribute time units String seconds since 1970-01-01T00:00:00Z
variable End_Date_UTC   String  
attribute End_Date_UTC bcodmo_name String date
attribute End_Date_UTC description String End date (UTC); format: DD/MM/YYYY
attribute End_Date_UTC long_name String End Date UTC
attribute End_Date_UTC nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/ (external link)
attribute End_Date_UTC time_precision String 1970-01-01
attribute End_Date_UTC units String unitless
variable End_Time_UTC   String  
attribute End_Time_UTC bcodmo_name String time
attribute End_Time_UTC description String End time (UTC); format: hh:mm
attribute End_Time_UTC long_name String End Time UTC
attribute End_Time_UTC nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/AHMSAA01/ (external link)
attribute End_Time_UTC units String unitless
variable End_ISO_DateTime_UTC   String  
attribute End_ISO_DateTime_UTC bcodmo_name String ISO_DateTime_UTC
attribute End_ISO_DateTime_UTC description String End date and time (UTC) formatted to ISO8601 standard: YYYY-MM-DDThh:mmZ
attribute End_ISO_DateTime_UTC long_name String End ISO Date Time UTC
attribute End_ISO_DateTime_UTC nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/DTUT8601/ (external link)
attribute End_ISO_DateTime_UTC time_precision String 1970-01-01T00:00Z
attribute End_ISO_DateTime_UTC units String unitless
variable latitude   double  
attribute latitude _CoordinateAxisType String Lat
attribute latitude _FillValue double NaN
attribute latitude actual_range double -39.310683, -23.5001
attribute latitude axis String Y
attribute latitude bcodmo_name String latitude
attribute latitude colorBarMaximum double 90.0
attribute latitude colorBarMinimum double -90.0
attribute latitude description String Start latitude
attribute latitude ioos_category String Location
attribute latitude long_name String Latitude
attribute latitude nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/LATX/ (external link)
attribute latitude source_name String Start_Latitude
attribute latitude standard_name String latitude
attribute latitude units String degrees_north
variable longitude   double  
attribute longitude _CoordinateAxisType String Lon
attribute longitude _FillValue double NaN
attribute longitude actual_range double -169.927017, -84.930117
attribute longitude axis String X
attribute longitude bcodmo_name String longitude
attribute longitude colorBarMaximum double 180.0
attribute longitude colorBarMinimum double -180.0
attribute longitude description String Start longitude
attribute longitude ioos_category String Location
attribute longitude long_name String Longitude
attribute longitude nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/LONX/ (external link)
attribute longitude source_name String Start_Longitude
attribute longitude standard_name String longitude
attribute longitude units String degrees_east
variable End_Latitude   double  
attribute End_Latitude _FillValue double NaN
attribute End_Latitude actual_range double -39.3103, -23.490667
attribute End_Latitude bcodmo_name String latitude
attribute End_Latitude colorBarMaximum double 90.0
attribute End_Latitude colorBarMinimum double -90.0
attribute End_Latitude description String End latitude
attribute End_Latitude long_name String Latitude
attribute End_Latitude nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/LATX/ (external link)
attribute End_Latitude standard_name String latitude
attribute End_Latitude units String degrees North
variable End_Longitude   double  
attribute End_Longitude _FillValue double NaN
attribute End_Longitude actual_range double -169.971433, -90.029317
attribute End_Longitude bcodmo_name String longitude
attribute End_Longitude colorBarMaximum double 180.0
attribute End_Longitude colorBarMinimum double -180.0
attribute End_Longitude description String End longitude
attribute End_Longitude long_name String Longitude
attribute End_Longitude nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/LONX/ (external link)
attribute End_Longitude standard_name String longitude
attribute End_Longitude units String degrees East
variable Event_ID   byte  
attribute Event_ID _FillValue byte 127
attribute Event_ID actual_range byte 1, 21
attribute Event_ID bcodmo_name String event
attribute Event_ID description String Event number
attribute Event_ID long_name String Event ID
attribute Event_ID nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/EVTAGFL/ (external link)
attribute Event_ID units String unitless
variable Sample_ID   byte  
attribute Sample_ID _FillValue byte 127
attribute Sample_ID actual_range byte 1, 24
attribute Sample_ID bcodmo_name String sample
attribute Sample_ID description String Sample number
attribute Sample_ID long_name String Sample ID
attribute Sample_ID nerc_identifier String https://vocab.nerc.ac.uk/collection/P02/current/ACYC/ (external link)
attribute Sample_ID units String unitless
variable depth   double  
attribute depth _CoordinateAxisType String Height
attribute depth _CoordinateZisPositive String down
attribute depth _FillValue double NaN
attribute depth actual_range double 9.46, 5231.51
attribute depth axis String Z
attribute depth bcodmo_name String depth
attribute depth description String Sample depth
attribute depth ioos_category String Location
attribute depth long_name String Sample Depth
attribute depth nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/DEPH/ (external link)
attribute depth positive String down
attribute depth standard_name String depth
attribute depth units String m
variable Th_230_D_CONC_BOTTLE_tf6m7p   float  
attribute Th_230_D_CONC_BOTTLE_tf6m7p _FillValue float NaN
attribute Th_230_D_CONC_BOTTLE_tf6m7p actual_range float 0.21, 31.56
attribute Th_230_D_CONC_BOTTLE_tf6m7p bcodmo_name String trace_element_conc
attribute Th_230_D_CONC_BOTTLE_tf6m7p description String Dissolved Th-230 concentration
attribute Th_230_D_CONC_BOTTLE_tf6m7p long_name String Th 230 D CONC BOTTLE Tf6m7p
attribute Th_230_D_CONC_BOTTLE_tf6m7p units String uBq/kg
variable SD1_Th_230_D_CONC_BOTTLE_tf6m7p   float  
attribute SD1_Th_230_D_CONC_BOTTLE_tf6m7p _FillValue float NaN
attribute SD1_Th_230_D_CONC_BOTTLE_tf6m7p actual_range float 0.07, 0.76
attribute SD1_Th_230_D_CONC_BOTTLE_tf6m7p bcodmo_name String trace_element_conc
attribute SD1_Th_230_D_CONC_BOTTLE_tf6m7p description String One standard deviation of Th_230_D_CONC_BOTTLE_tf6m7p
attribute SD1_Th_230_D_CONC_BOTTLE_tf6m7p long_name String SD1 Th 230 D CONC BOTTLE Tf6m7p
attribute SD1_Th_230_D_CONC_BOTTLE_tf6m7p units String uBq/kg
variable Flag_Th_230_D_CONC_BOTTLE_tf6m7p   byte  
attribute Flag_Th_230_D_CONC_BOTTLE_tf6m7p _FillValue byte 127
attribute Flag_Th_230_D_CONC_BOTTLE_tf6m7p actual_range byte 1, 1
attribute Flag_Th_230_D_CONC_BOTTLE_tf6m7p bcodmo_name String q_flag
attribute Flag_Th_230_D_CONC_BOTTLE_tf6m7p colorBarMaximum double 150.0
attribute Flag_Th_230_D_CONC_BOTTLE_tf6m7p colorBarMinimum double 0.0
attribute Flag_Th_230_D_CONC_BOTTLE_tf6m7p description String Quality flag for Th_230_D_CONC_BOTTLE_tf6m7p
attribute Flag_Th_230_D_CONC_BOTTLE_tf6m7p long_name String Flag Th 230 D CONC BOTTLE Tf6m7p
attribute Flag_Th_230_D_CONC_BOTTLE_tf6m7p units String unitless
variable Th_232_D_CONC_BOTTLE_lffbvx   float  
attribute Th_232_D_CONC_BOTTLE_lffbvx _FillValue float NaN
attribute Th_232_D_CONC_BOTTLE_lffbvx actual_range float 0.0028, 0.2242
attribute Th_232_D_CONC_BOTTLE_lffbvx bcodmo_name String trace_element_conc
attribute Th_232_D_CONC_BOTTLE_lffbvx description String Dissolved Th-232 concentration
attribute Th_232_D_CONC_BOTTLE_lffbvx long_name String Th 232 D CONC BOTTLE Lffbvx
attribute Th_232_D_CONC_BOTTLE_lffbvx units String pmol/kg
variable SD1_Th_232_D_CONC_BOTTLE_lffbvx   float  
attribute SD1_Th_232_D_CONC_BOTTLE_lffbvx _FillValue float NaN
attribute SD1_Th_232_D_CONC_BOTTLE_lffbvx actual_range float 0.0047, 0.0081
attribute SD1_Th_232_D_CONC_BOTTLE_lffbvx bcodmo_name String trace_element_conc
attribute SD1_Th_232_D_CONC_BOTTLE_lffbvx description String One standard deviation of Th_232_D_CONC_BOTTLE_lffbvx
attribute SD1_Th_232_D_CONC_BOTTLE_lffbvx long_name String SD1 Th 232 D CONC BOTTLE Lffbvx
attribute SD1_Th_232_D_CONC_BOTTLE_lffbvx units String pmol/kg
variable Flag_Th_232_D_CONC_BOTTLE_lffbvx   byte  
attribute Flag_Th_232_D_CONC_BOTTLE_lffbvx _FillValue byte 127
attribute Flag_Th_232_D_CONC_BOTTLE_lffbvx actual_range byte 1, 1
attribute Flag_Th_232_D_CONC_BOTTLE_lffbvx bcodmo_name String q_flag
attribute Flag_Th_232_D_CONC_BOTTLE_lffbvx colorBarMaximum double 150.0
attribute Flag_Th_232_D_CONC_BOTTLE_lffbvx colorBarMinimum double 0.0
attribute Flag_Th_232_D_CONC_BOTTLE_lffbvx description String Quality flag for Th_232_D_CONC_BOTTLE_lffbvx
attribute Flag_Th_232_D_CONC_BOTTLE_lffbvx long_name String Flag Th 232 D CONC BOTTLE Lffbvx
attribute Flag_Th_232_D_CONC_BOTTLE_lffbvx units String unitless
variable Pa_231_D_CONC_BOTTLE_rrjlxc   float  
attribute Pa_231_D_CONC_BOTTLE_rrjlxc _FillValue float NaN
attribute Pa_231_D_CONC_BOTTLE_rrjlxc actual_range float 0.3, 8.89
attribute Pa_231_D_CONC_BOTTLE_rrjlxc bcodmo_name String trace_element_conc
attribute Pa_231_D_CONC_BOTTLE_rrjlxc description String Dissolved Pa-231 concentration
attribute Pa_231_D_CONC_BOTTLE_rrjlxc long_name String Pa 231 D CONC BOTTLE Rrjlxc
attribute Pa_231_D_CONC_BOTTLE_rrjlxc units String uBq/kg
variable SD1_Pa_231_D_CONC_BOTTLE_rrjlxc   float  
attribute SD1_Pa_231_D_CONC_BOTTLE_rrjlxc _FillValue float NaN
attribute SD1_Pa_231_D_CONC_BOTTLE_rrjlxc actual_range float 0.03, 0.3
attribute SD1_Pa_231_D_CONC_BOTTLE_rrjlxc bcodmo_name String trace_element_conc
attribute SD1_Pa_231_D_CONC_BOTTLE_rrjlxc description String One standard deviation of Pa_231_D_CONC_BOTTLE_rrjlxc
attribute SD1_Pa_231_D_CONC_BOTTLE_rrjlxc long_name String SD1 Pa 231 D CONC BOTTLE Rrjlxc
attribute SD1_Pa_231_D_CONC_BOTTLE_rrjlxc units String uBq/kg
variable Flag_Pa_231_D_CONC_BOTTLE_rrjlxc   byte  
attribute Flag_Pa_231_D_CONC_BOTTLE_rrjlxc _FillValue byte 127
attribute Flag_Pa_231_D_CONC_BOTTLE_rrjlxc actual_range byte 1, 1
attribute Flag_Pa_231_D_CONC_BOTTLE_rrjlxc bcodmo_name String q_flag
attribute Flag_Pa_231_D_CONC_BOTTLE_rrjlxc colorBarMaximum double 150.0
attribute Flag_Pa_231_D_CONC_BOTTLE_rrjlxc colorBarMinimum double 0.0
attribute Flag_Pa_231_D_CONC_BOTTLE_rrjlxc description String Quality flag for Pa_231_D_CONC_BOTTLE_rrjlxc
attribute Flag_Pa_231_D_CONC_BOTTLE_rrjlxc long_name String Flag Pa 231 D CONC BOTTLE Rrjlxc
attribute Flag_Pa_231_D_CONC_BOTTLE_rrjlxc units String unitless
variable Th_230_D_XS_CONC_BOTTLE   float  
attribute Th_230_D_XS_CONC_BOTTLE _FillValue float NaN
attribute Th_230_D_XS_CONC_BOTTLE actual_range float 0.21, 31.46
attribute Th_230_D_XS_CONC_BOTTLE bcodmo_name String trace_element_conc
attribute Th_230_D_XS_CONC_BOTTLE description String Dissolved Th-230 concentration corrected for the dissolution of lithogenic minerals, thereby isolating the dissolved Th-230 produced by decay of dissolved uranium (see metadata for full explanation)
attribute Th_230_D_XS_CONC_BOTTLE long_name String Th 230 D XS CONC BOTTLE
attribute Th_230_D_XS_CONC_BOTTLE units String uBq/kg
variable SD1_Th_230_D_XS_CONC_BOTTLE   float  
attribute SD1_Th_230_D_XS_CONC_BOTTLE _FillValue float NaN
attribute SD1_Th_230_D_XS_CONC_BOTTLE actual_range float 0.07, 0.76
attribute SD1_Th_230_D_XS_CONC_BOTTLE bcodmo_name String trace_element_conc
attribute SD1_Th_230_D_XS_CONC_BOTTLE description String One standard deviation of Th_230_D_XS_CONC_BOTTLE
attribute SD1_Th_230_D_XS_CONC_BOTTLE long_name String SD1 Th 230 D XS CONC BOTTLE
attribute SD1_Th_230_D_XS_CONC_BOTTLE units String uBq/kg
variable Flag_Th_230_D_XS_CONC_BOTTLE   byte  
attribute Flag_Th_230_D_XS_CONC_BOTTLE _FillValue byte 127
attribute Flag_Th_230_D_XS_CONC_BOTTLE actual_range byte 1, 1
attribute Flag_Th_230_D_XS_CONC_BOTTLE bcodmo_name String q_flag
attribute Flag_Th_230_D_XS_CONC_BOTTLE colorBarMaximum double 150.0
attribute Flag_Th_230_D_XS_CONC_BOTTLE colorBarMinimum double 0.0
attribute Flag_Th_230_D_XS_CONC_BOTTLE description String Quality flag for Th_230_D_XS_CONC_BOTTLE
attribute Flag_Th_230_D_XS_CONC_BOTTLE long_name String Flag Th 230 D XS CONC BOTTLE
attribute Flag_Th_230_D_XS_CONC_BOTTLE units String unitless
variable Pa_231_D_XS_CONC_BOTTLE   float  
attribute Pa_231_D_XS_CONC_BOTTLE _FillValue float NaN
attribute Pa_231_D_XS_CONC_BOTTLE actual_range float 0.3, 8.89
attribute Pa_231_D_XS_CONC_BOTTLE bcodmo_name String trace_element_conc
attribute Pa_231_D_XS_CONC_BOTTLE description String Dissolved Pa-231 concentration corrected for the dissolution of lithogenic minerals (see metadata for full explanation)
attribute Pa_231_D_XS_CONC_BOTTLE long_name String Pa 231 D XS CONC BOTTLE
attribute Pa_231_D_XS_CONC_BOTTLE units String uBq/kg
variable SD1_Pa_231_D_XS_CONC_BOTTLE   float  
attribute SD1_Pa_231_D_XS_CONC_BOTTLE _FillValue float NaN
attribute SD1_Pa_231_D_XS_CONC_BOTTLE actual_range float 0.03, 0.3
attribute SD1_Pa_231_D_XS_CONC_BOTTLE bcodmo_name String trace_element_conc
attribute SD1_Pa_231_D_XS_CONC_BOTTLE description String One standard deviation of Pa_231_D_XS_CONC_BOTTLE
attribute SD1_Pa_231_D_XS_CONC_BOTTLE long_name String SD1 Pa 231 D XS CONC BOTTLE
attribute SD1_Pa_231_D_XS_CONC_BOTTLE units String uBq/kg
variable Flag_Pa_231_D_XS_CONC_BOTTLE   byte  
attribute Flag_Pa_231_D_XS_CONC_BOTTLE _FillValue byte 127
attribute Flag_Pa_231_D_XS_CONC_BOTTLE actual_range byte 1, 1
attribute Flag_Pa_231_D_XS_CONC_BOTTLE bcodmo_name String q_flag
attribute Flag_Pa_231_D_XS_CONC_BOTTLE colorBarMaximum double 150.0
attribute Flag_Pa_231_D_XS_CONC_BOTTLE colorBarMinimum double 0.0
attribute Flag_Pa_231_D_XS_CONC_BOTTLE description String Quality flag for Pa_231_D_XS_CONC_BOTTLE
attribute Flag_Pa_231_D_XS_CONC_BOTTLE long_name String Flag Pa 231 D XS CONC BOTTLE
attribute Flag_Pa_231_D_XS_CONC_BOTTLE units String unitless

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