Accessing BCO-DMO data
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| Dataset Title: | [GN01 Radium and Thorium] - Radium and thorium isotopes measured in the Western Arctic as part of the 2015 US GEOTRACES Arctic Cruise on the USCGC Healy (HLY1502) from August to October 2015 (U.S. Arctic GEOTRACES Study) 
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| Institution: | BCO-DMO (Dataset ID: bcodmo_dataset_718440) |
| Range: | longitude = -180.0 to 179.456°E, latitude = 60.176 to 89.992°N, depth = 2.0 to 4197.0m, time = 2015-08-12T21:50Z to 2015-10-07T22:44Z |
| Information: | Summary
| License
| FGDC
| ISO 19115
| Metadata
| Background
| Subset
| Data Access Form
| Files
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Attributes {
s {
Cruise_ID {
String bcodmo_name "cruise_id";
String description "GEOTRACES cruise identifier";
String long_name "Cruise ID";
String units "unitless";
}
GEOTRC_CASTNO {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 2, 13;
String bcodmo_name "cast";
String description "Cast number";
String long_name "GEOTRC CASTNO";
String units "unitless";
}
GEOTRC_INSTR {
String bcodmo_name "instrument";
String description "Sampling method";
String long_name "GEOTRC INSTR";
String units "unitless";
}
Station_ID {
Float32 _FillValue NaN;
Float32 actual_range 1.0, 66.0;
String bcodmo_name "station";
String description "Station number";
String long_name "Station ID";
String units "unitless";
}
Start_Date_UTC {
String bcodmo_name "date";
String description "Date (UTC) at start of sample collection; format: yyyy-mm-dd";
String long_name "Start Date UTC";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/";
String time_precision "1970-01-01";
String units "unitless";
}
Start_Time_UTC {
String bcodmo_name "time";
String description "Time (UTC) at start of sample collection; format: HH:MM";
String long_name "Start Time UTC";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/AHMSAA01/";
String units "unitless";
}
time {
String _CoordinateAxisType "Time";
Float64 actual_range 1.4394162e+9, 1.44425784e+9;
String axis "T";
String bcodmo_name "ISO_DateTime_UTC";
String description "Date and time (UTC) at start of sample collection; format: yyyy-mm-ddTHH:MMZ";
String ioos_category "Time";
String long_name "Start ISO Date Time UTC";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/DTUT8601/";
String source_name "Start_ISO_DateTime_UTC";
String standard_name "time";
String time_origin "01-JAN-1970 00:00:00";
String time_precision "1970-01-01T00:00Z";
String units "seconds since 1970-01-01T00:00:00Z";
}
End_Date_UTC {
String bcodmo_name "date";
String description "Date (UTC) at end of sample collection; format: yyyy-mm-dd";
String long_name "End Date UTC";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/";
String time_precision "1970-01-01";
String units "unitless";
}
End_Time_UTC {
String bcodmo_name "time";
String description "Time (UTC) at end of sample collection; format: HH:MM";
String long_name "End Time UTC";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/AHMSAA01/";
String units "unitless";
}
End_ISO_DateTime_UTC {
String bcodmo_name "ISO_DateTime_UTC";
String description "Date and time (UTC) at end of sample collection; format: yyyy-mm-ddTHH:MMZ";
String long_name "End ISO Date Time UTC";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/DTUT8601/";
String time_precision "1970-01-01T00:00Z";
String units "unitless";
}
latitude {
String _CoordinateAxisType "Lat";
Float64 _FillValue NaN;
Float64 actual_range 60.176, 89.992;
String axis "Y";
String bcodmo_name "latitude";
Float64 colorBarMaximum 90.0;
Float64 colorBarMinimum -90.0;
String description "Latitude at start of sample collection";
String ioos_category "Location";
String long_name "Latitude";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/LATX/";
String source_name "Start_Latitude";
String standard_name "latitude";
String units "degrees_north";
}
longitude {
String _CoordinateAxisType "Lon";
Float64 _FillValue NaN;
Float64 actual_range -180.0, 179.456;
String axis "X";
String bcodmo_name "longitude";
Float64 colorBarMaximum 180.0;
Float64 colorBarMinimum -180.0;
String description "Longitude at start of sample collection";
String ioos_category "Location";
String long_name "Longitude";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/LONX/";
String source_name "Start_Longitude";
String standard_name "longitude";
String units "degrees_east";
}
End_Latitude {
Float32 _FillValue NaN;
Float32 actual_range 60.176, 89.992;
String bcodmo_name "latitude";
Float64 colorBarMaximum 90.0;
Float64 colorBarMinimum -90.0;
String description "Latitude at end of sample collection";
String long_name "Latitude";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/LATX/";
String standard_name "latitude";
String units "degrees North";
}
End_Longitude {
Float32 _FillValue NaN;
Float32 actual_range -180.0, 179.456;
String bcodmo_name "longitude";
Float64 colorBarMaximum 180.0;
Float64 colorBarMinimum -180.0;
String description "Longitude at end of sample collection";
String long_name "Longitude";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/LONX/";
String standard_name "longitude";
String units "degrees East";
}
Event_ID {
Int16 _FillValue 32767;
Int16 actual_range 6011, 9218;
String bcodmo_name "event";
String description "Event number";
String long_name "Event ID";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/EVTAGFL/";
String units "unitless";
}
Sample_ID {
Int16 _FillValue 32767;
Int16 actual_range 10506, 12313;
String bcodmo_name "sample";
String description "GEOTRACES sample number";
String long_name "Sample ID";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P02/current/ACYC/";
String units "unitless";
}
depth {
String _CoordinateAxisType "Height";
String _CoordinateZisPositive "down";
Float64 _FillValue NaN;
Float64 actual_range 2.0, 4197.0;
String axis "Z";
String bcodmo_name "depth";
String description "Sample depth";
String ioos_category "Location";
String long_name "Sample Depth";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/DEPH/";
String positive "down";
String standard_name "depth";
String units "m";
}
Ra_226_D_CONC_PUMP_tmldld {
Float32 _FillValue NaN;
Float32 actual_range 0.3466, 2.7572;
String bcodmo_name "radioactive_isotope_conc";
String description "Dissolved radium-226 activity";
String long_name "Ra 226 D CONC PUMP Tmldld";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P02/current/WRAD/";
String units "mBq/kg";
}
SD1_Ra_226_D_CONC_PUMP_tmldld {
Float32 _FillValue NaN;
Float32 actual_range 0.0095, 0.1609;
String bcodmo_name "radioactive_isotope_conc";
String description "One standard deviation of Ra_226_D_CONC_PUMP_tmldld";
String long_name "SD1 Ra 226 D CONC PUMP Tmldld";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P02/current/WRAD/";
String units "mBq/kg";
}
Flag_Ra_226_D_CONC_PUMP_tmldld {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 1, 8;
String bcodmo_name "q_flag";
Float64 colorBarMaximum 150.0;
Float64 colorBarMinimum 0.0;
String description "SeaDataNet quality flag for Ra_226_D_CONC_PUMP_tmldld";
String long_name "Flag Ra 226 D CONC PUMP Tmldld";
String units "unitless";
}
Ra_228_D_CONC_PUMP_5i7kz7 {
Float32 _FillValue NaN;
Float32 actual_range 0.0245, 3.7899;
String bcodmo_name "radioactive_isotope_conc";
String description "Dissolved radium-228 activity";
String long_name "Ra 228 D CONC PUMP 5i7kz7";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P02/current/WRAD/";
String units "mBq/kg";
}
SD1_Ra_228_D_CONC_PUMP_5i7kz7 {
Float32 _FillValue NaN;
Float32 actual_range 0.0063, 0.2429;
String bcodmo_name "radioactive_isotope_conc";
String description "One standard deviation of Ra_228_D_CONC_PUMP_5i7kz7";
String long_name "SD1 Ra 228 D CONC PUMP 5i7kz7";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P02/current/WRAD/";
String units "mBq/kg";
}
Flag_Ra_228_D_CONC_PUMP_5i7kz7 {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 1, 9;
String bcodmo_name "q_flag";
Float64 colorBarMaximum 150.0;
Float64 colorBarMinimum 0.0;
String description "SeaDataNet quality flag for Ra_228_D_CONC_PUMP_5i7kz7";
String long_name "Flag Ra 228 D CONC PUMP 5i7kz7";
String units "unitless";
}
Ra_224_D_CONC_PUMP_ryelyc {
Float32 _FillValue NaN;
Float32 actual_range 0.0048, 1.2063;
String bcodmo_name "radioactive_isotope_conc";
String description "Dissolved radium-224 activity";
String long_name "Ra 224 D CONC PUMP Ryelyc";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P02/current/WRAD/";
String units "mBq/kg";
}
SD1_Ra_224_D_CONC_PUMP_ryelyc {
Float32 _FillValue NaN;
Float32 actual_range 0.001, 0.1293;
String bcodmo_name "radioactive_isotope_conc";
String description "One standard deviation of Ra_224_D_CONC_PUMP_ryelyc";
String long_name "SD1 Ra 224 D CONC PUMP Ryelyc";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P02/current/WRAD/";
String units "mBq/kg";
}
Flag_Ra_224_D_CONC_PUMP_ryelyc {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 2, 9;
String bcodmo_name "q_flag";
Float64 colorBarMaximum 150.0;
Float64 colorBarMinimum 0.0;
String description "SeaDataNet quality flag for Ra_224_D_CONC_PUMP_ryelyc";
String long_name "Flag Ra 224 D CONC PUMP Ryelyc";
String units "unitless";
}
Ra_224xs_D_CONC_PUMP {
Float32 _FillValue NaN;
Float32 actual_range 7.0e-4, 0.6965;
String bcodmo_name "radioactive_isotope_conc";
String description "Excess dissolved radium-224 activity";
String long_name "Ra 224xs D CONC PUMP";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P02/current/WRAD/";
String units "mBq/kg";
}
Ra_224xs_D_CONC_PUMP_ERR {
Float32 _FillValue NaN;
Float32 actual_range 0.0026, 0.167;
String bcodmo_name "radioactive_isotope_conc";
String description "One standard deviation of Ra_224xs_D_CONC_PUMP";
String long_name "Ra 224xs D CONC PUMP ERR";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P02/current/WRAD/";
String units "mBq/kg";
}
Ra_224xs_D_CONC_PUMP_FLAG {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 2, 9;
String bcodmo_name "q_flag";
Float64 colorBarMaximum 150.0;
Float64 colorBarMinimum 0.0;
String description "SeaDataNet quality flag for Ra_224xs_D_CONC_PUMP";
String long_name "Ra 224xs D CONC PUMP FLAG";
String units "unitless";
}
Ra_223_D_CONC_PUMP_8qp1jk {
Float32 _FillValue NaN;
Float32 actual_range 0.0, 0.1149;
String bcodmo_name "radioactive_isotope_conc";
String description "Dissolved radium-223 activity";
String long_name "Ra 223 D CONC PUMP 8qp1jk";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P02/current/WRAD/";
String units "mBq/kg";
}
SD1_Ra_223_D_CONC_PUMP_8qp1jk {
Float32 _FillValue NaN;
Float32 actual_range 0.0, 0.0452;
String bcodmo_name "radioactive_isotope_conc";
String description "One standard deviation of Ra_223_D_CONC_PUMP_8qp1jk";
String long_name "SD1 Ra 223 D CONC PUMP 8qp1jk";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P02/current/WRAD/";
String units "mBq/kg";
}
Flag_Ra_223_D_CONC_PUMP_8qp1jk {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 2, 9;
String bcodmo_name "q_flag";
Float64 colorBarMaximum 150.0;
Float64 colorBarMinimum 0.0;
String description "SeaDataNet quality flag for Ra_223_D_CONC_PUMP_8qp1jk";
String long_name "Flag Ra 223 D CONC PUMP 8qp1jk";
String units "unitless";
}
Ra_223xs_D_CONC_PUMP {
Float32 _FillValue NaN;
Float32 actual_range 1.0e-4, 0.1087;
String bcodmo_name "radioactive_isotope_conc";
String description "Excess dissolved radium-223 actvitiy";
String long_name "Ra 223xs D CONC PUMP";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P02/current/WRAD/";
String units "mBq/kg";
}
Ra_223xs_D_CONC_PUMP_ERR {
Float32 _FillValue NaN;
Float32 actual_range 9.0e-4, 0.0452;
String bcodmo_name "radioactive_isotope_conc";
String description "One standard deviation of Ra_223xs_D_CONC_PUMP";
String long_name "Ra 223xs D CONC PUMP ERR";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P02/current/WRAD/";
String units "mBq/kg";
}
Ra_223xs_D_CONC_PUMP_FLAG {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 2, 9;
String bcodmo_name "q_flag";
Float64 colorBarMaximum 150.0;
Float64 colorBarMinimum 0.0;
String description "SeaDataNet quality flag for Ra_223xs_D_CONC_PUMP";
String long_name "Ra 223xs D CONC PUMP FLAG";
String units "unitless";
}
Th_228_D_CONC_PUMP_fejwms {
Float32 _FillValue NaN;
Float32 actual_range 0.0055, 1.5825;
String bcodmo_name "radioactive_isotope_conc";
String description "Dissolved thorium-228 activity";
String long_name "Th 228 D CONC PUMP Fejwms";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P02/current/WRAD/";
String units "mBq/kg";
}
SD1_Th_228_D_CONC_PUMP_fejwms {
Float32 _FillValue NaN;
Float32 actual_range 9.0e-4, 3.6846;
String bcodmo_name "radioactive_isotope_conc";
String description "One standard deviation of Th_228_D_CONC_PUMP_fejwms";
String long_name "SD1 Th 228 D CONC PUMP Fejwms";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P02/current/WRAD/";
String units "mBq/kg";
}
Flag_Th_228_D_CONC_PUMP_fejwms {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 2, 9;
String bcodmo_name "q_flag";
Float64 colorBarMaximum 150.0;
Float64 colorBarMinimum 0.0;
String description "SeaDataNet quality flag for Th_228_D_CONC_PUMP_fejwms";
String long_name "Flag Th 228 D CONC PUMP Fejwms";
String units "unitless";
}
}
NC_GLOBAL {
String access_formats ".htmlTable,.csv,.json,.mat,.nc,.tsv,.esriCsv,.geoJson,.odvTxt";
String acquisition_description
"Water column sampling:
Radium and thorium isotopes were collected on manganese-coated cartridges
filtered at depth using an adapted McLane in situ pump (WTS-LV). The pumps
were programmed to filter 1500-2000L of seawater per deployment. Water (15-25
L) was also collected at the same depth using a 30L Niskin bottle; these
samples were filtered (at <1L/min) through a manganese-coated acrylic fiber
and used to calculate radium extraction efficiency of the pumped samples. The
cartridges were rinsed with radium-free fresh water and excess moisture was
removed using compressed air. Samples were analyzed three times using a
delayed coincidence counter (RaDeCC) for 223Ra, 224Ra, 228Th, and 227Ac. The
cartridge and fiber media were ashed at 820 degrees C and measured on gamma
detectors for long lived radium (226Ra, 228Ra) and thorium isotopes. 226Ra was
determined via alpha scintillation counting of the Niskin bottle Mn fiber
samples.
Surface water sampling:
Surface water radium samples (280 L) were collected from approximately 2 m
using a submersible surface pump and filtered through a manganese coated
acrylic fiber, which quantitatively scavenges radium from the seawater. Fiber
samples were then ashed in a muffle furnace at 820 degrees C for 24 hours and
the fiber ash was transferred to polystyrene vials, sealed with epoxy (to
prevent 222Rn loss), and counted on high purity, well-type germanium detectors
to measure 228Ra, using the lines of 228Ac (338 KeV and 911 KeV), and 226Ra,
using the line for 214Pb (352 KeV). Detector efficiencies were determined by
measuring ashed fiber standards prepared with a standard solution containing
226Ra and 232Th with daughters in equilibrium.";
String awards_0_award_nid "718438";
String awards_0_award_number "OCE-1458305";
String awards_0_data_url "https://www.nsf.gov/awardsearch/showAward?AWD_ID=1458305";
String awards_0_funder_name "NSF Division of Ocean Sciences";
String awards_0_funding_acronym "NSF OCE";
String awards_0_funding_source_nid "355";
String awards_0_program_manager "Henrietta N Edmonds";
String awards_0_program_manager_nid "51517";
String awards_1_award_nid "718439";
String awards_1_award_number "OCE-1458424";
String awards_1_data_url "https://www.nsf.gov/awardsearch/showAward?AWD_ID=1458424";
String awards_1_funder_name "NSF Division of Ocean Sciences";
String awards_1_funding_acronym "NSF OCE";
String awards_1_funding_source_nid "355";
String awards_1_program_manager "Henrietta N Edmonds";
String awards_1_program_manager_nid "51517";
String cdm_data_type "Other";
String comment
"Radium and Thorium Isotopes
GEOTRACES Arctic - HLY1502 (GN01)
PI: Matthew Charette (WHOI)
Co-PI: Willard Moore (University of South Carolina)
Version History:
06 April 2020 (current) - version 3; re-formatted for GEOTRACES IDP compliance.
02 July 2019 - version 2; additional data columns reported; additional columns for units in dpm/L and mBq/kg.
31 October 2017 - version 1.";
String Conventions "COARDS, CF-1.6, ACDD-1.3";
String creator_email "info@bco-dmo.org";
String creator_name "BCO-DMO";
String creator_type "institution";
String creator_url "https://www.bco-dmo.org/";
String data_source "extract_data_as_tsv version 2.3 19 Dec 2019";
String date_created "2017-10-31T18:02:40Z";
String date_modified "2020-04-07T13:22:40Z";
String defaultDataQuery "&time<now";
String doi "10.26008/1912/bco-dmo.718440.3";
Float64 Easternmost_Easting 179.456;
Float64 geospatial_lat_max 89.992;
Float64 geospatial_lat_min 60.176;
String geospatial_lat_units "degrees_north";
Float64 geospatial_lon_max 179.456;
Float64 geospatial_lon_min -180.0;
String geospatial_lon_units "degrees_east";
Float64 geospatial_vertical_max 4197.0;
Float64 geospatial_vertical_min 2.0;
String geospatial_vertical_positive "down";
String geospatial_vertical_units "m";
String history
"2024-11-08T06:21:01Z (local files)
2024-11-08T06:21:01Z https://erddap.bco-dmo.org/tabledap/bcodmo_dataset_718440.das";
String infoUrl "https://www.bco-dmo.org/dataset/718440";
String institution "BCO-DMO";
String instruments_0_acronym "Niskin bottle";
String instruments_0_dataset_instrument_description "In addition to water collected by pump, water (15-25 L) was also collected using a 30L Niskin bottles.";
String instruments_0_dataset_instrument_nid "718453";
String instruments_0_description "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.";
String instruments_0_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/";
String instruments_0_instrument_name "Niskin bottle";
String instruments_0_instrument_nid "413";
String instruments_0_supplied_name "30L Niskin bottles";
String instruments_1_acronym "MLVPump";
String instruments_1_dataset_instrument_description "Water column samples were collected using McLane in situ pumps (McLane WTS-LV).";
String instruments_1_dataset_instrument_nid "718450";
String instruments_1_description "The Large Volume Pumping System-WTS-LV can be one of several different models of Water Transfer Systems (WTS) Large Volume (LV) pumping systems designed and manufactured by McLane Research Labs (Falmouth, MA, USA). The WTS-LV systems are large volume in-situ filtration systems designed to collect sinking particulates. WTS-LV systems are individual in situ, battery-powered, pumping/filtration units that can be deployed at multiple depths per cast to provide information on how particle flux changes with depth. The McLane WTS-LV series of oceanographic pumps draw ambient water through filters and can pump large volumes of seawater during a single cast. The WTS-LV pumps are designed for use from a hydro-wire and employ advanced control algorithms to dynamically optimize flow rates as material accumulates on a filter.";
String instruments_1_instrument_name "Large Volume Pumping System-WTS-LV";
String instruments_1_instrument_nid "512";
String instruments_1_supplied_name "McLane WTS-LV";
String instruments_2_acronym "RaDeCC";
String instruments_2_dataset_instrument_description "Samples were analyzed using Radium Delayed Coincidence (RaDeCC) counters and high-purity, well-type germanium detectors.";
String instruments_2_dataset_instrument_nid "718452";
String instruments_2_description
"The RaDeCC is an alpha scintillation counter that distinguishes decay events of short-lived radium daughter products based on their contrasting half-lives. This system was pioneered by Giffin et al. (1963) and adapted for radium measurements by Moore and Arnold (1996).
References:
Giffin, C., A. Kaufman, W.S. Broecker (1963). Delayed coincidence counter for the assay of actinon and thoron. J. Geophys. Res., 68, pp. 1749-1757.
Moore, W.S., R. Arnold (1996). Measurement of 223Ra and 224Ra in coastal waters using a delayed coincidence counter.
J. Geophys. Res., 101 (1996), pp. 1321-1329.
Charette, Matthew A.; Dulaiova, Henrieta; Gonneea, Meagan E.; Henderson, Paul B.; Moore, Willard S.; Scholten, Jan C.; Pham, M. K. (2012). GEOTRACES radium isotopes interlaboratory comparison experiment. Limnology and Oceanography - Methods, vol 10, pg 451.";
String instruments_2_instrument_name "Radium Delayed Coincidence Counter";
String instruments_2_instrument_nid "688";
String instruments_2_supplied_name "Radium Delayed Coincidence Counter";
String instruments_3_dataset_instrument_description "Surface samples were collected using a Finish Thompson 1/2 HP Polypropylene 115V Magnetic Drive pump.";
String instruments_3_dataset_instrument_nid "718451";
String instruments_3_description "A pump is a device that moves fluids (liquids or gases), or sometimes slurries, by mechanical action. Pumps can be classified into three major groups according to the method they use to move the fluid: direct lift, displacement, and gravity pumps";
String instruments_3_instrument_name "Pump";
String instruments_3_instrument_nid "726";
String instruments_3_supplied_name "Finish Thompson Magnetic Drive pump";
String keywords "223xs, 224xs, 5i7kz7, 8qp1jk, bco, bco-dmo, biological, castno, chemical, conc, cruise, Cruise_ID, data, dataset, date, depth, dmo, end, End_Date_UTC, End_ISO_DateTime_UTC, End_Latitude, End_Longitude, End_Time_UTC, erddap, error, event, Event_ID, fejwms, flag, Flag_Ra_223_D_CONC_PUMP_8qp1jk, Flag_Ra_224_D_CONC_PUMP_ryelyc, Flag_Ra_226_D_CONC_PUMP_tmldld, Flag_Ra_228_D_CONC_PUMP_5i7kz7, Flag_Th_228_D_CONC_PUMP_fejwms, geotrc, GEOTRC_CASTNO, GEOTRC_INSTR, instr, iso, latitude, longitude, management, oceanography, office, preliminary, pump, Ra_223_D_CONC_PUMP_8qp1jk, Ra_223xs_D_CONC_PUMP, Ra_223xs_D_CONC_PUMP_ERR, Ra_223xs_D_CONC_PUMP_FLAG, Ra_224_D_CONC_PUMP_ryelyc, Ra_224xs_D_CONC_PUMP, Ra_224xs_D_CONC_PUMP_ERR, Ra_224xs_D_CONC_PUMP_FLAG, Ra_226_D_CONC_PUMP_tmldld, Ra_228_D_CONC_PUMP_5i7kz7, ryelyc, sample, Sample_Depth, Sample_ID, sd1, SD1_Ra_223_D_CONC_PUMP_8qp1jk, SD1_Ra_224_D_CONC_PUMP_ryelyc, SD1_Ra_226_D_CONC_PUMP_tmldld, SD1_Ra_228_D_CONC_PUMP_5i7kz7, SD1_Th_228_D_CONC_PUMP_fejwms, start, Start_Date_UTC, Start_Time_UTC, station, Station_ID, Th_228_D_CONC_PUMP_fejwms, time, tmldld";
String license "https://www.bco-dmo.org/dataset/718440/license";
String metadata_source "https://www.bco-dmo.org/api/dataset/718440";
Float64 Northernmost_Northing 89.992;
String param_mapping "{'718440': {'Start_ISO_DateTime_UTC': 'flag - time', 'Sample_Depth': 'flag - depth', 'Start_Longitude': 'flag - longitude', 'Start_Latitude': 'flag - latitude'}}";
String parameter_source "https://www.bco-dmo.org/mapserver/dataset/718440/parameters";
String people_0_affiliation "Woods Hole Oceanographic Institution";
String people_0_affiliation_acronym "WHOI";
String people_0_person_name "Matthew A. Charette";
String people_0_person_nid "50931";
String people_0_role "Principal Investigator";
String people_0_role_type "originator";
String people_1_affiliation "University of South Carolina";
String people_1_person_name "Willard S Moore";
String people_1_person_nid "51613";
String people_1_role "Co-Principal Investigator";
String people_1_role_type "originator";
String people_2_affiliation "Woods Hole Oceanographic Institution";
String people_2_affiliation_acronym "WHOI BCO-DMO";
String people_2_person_name "Shannon Rauch";
String people_2_person_nid "51498";
String people_2_role "BCO-DMO Data Manager";
String people_2_role_type "related";
String project "U.S. GEOTRACES Arctic,Arctic GEOTRACES Ra Th";
String projects_0_acronym "U.S. GEOTRACES Arctic";
String projects_0_description
"Description from NSF award abstract:
In pursuit of its goal \"to identify processes and quantify fluxes that control the distributions of key trace elements and isotopes in the ocean, and to establish the sensitivity of these distributions to changing environmental conditions\", in 2015 the International GEOTRACES Program will embark on several years of research in the Arctic Ocean. In a region where climate warming and general environmental change are occurring at amazing speed, research such as this is important for understanding the current state of Arctic Ocean geochemistry and for developing predictive capability as the regional ecosystem continues to warm and influence global oceanic and climatic conditions. The three investigators funded on this award, will manage a large team of U.S.scientists who will compete through the regular NSF proposal process to contribute their own unique expertise in marine trace metal, isotopic, and carbon cycle geochemistry to the U.S. effort. The three managers will be responsible for arranging and overseeing at-sea technical services such as hydrographic measurements, nutrient analyses, and around-the-clock management of on-deck sampling activites upon which all participants depend, and for organizing all pre- and post-cruise technical support and scientific meetings. The management team will also lead educational outreach activities for the general public in Nome and Barrow, Alaska, to explain the significance of the study to these communities and to learn from residents' insights on observed changes in the marine system. The project itself will provide for the support and training of a number of pre-doctoral students and post-doctoral researchers. Inasmuch as the Arctic Ocean is an epicenter of global climate change, findings of this study are expected to advance present capability to forecast changes in regional and globlal ecosystem and climate system functioning.
As the United States' contribution to the International GEOTRACES Arctic Ocean initiative, this project will be part of an ongoing multi-national effort to further scientific knowledge about trace elements and isotopes in the world ocean. This U.S. expedition will focus on the western Arctic Ocean in the boreal summer of 2015. The scientific team will consist of the management team funded through this award plus a team of scientists from U.S. academic institutions who will have successfully competed for and received NSF funds for specific science projects in time to participate in the final stages of cruise planning. The cruise track segments will include the Bering Strait, Chukchi shelf, and the deep Canada Basin. Several stations will be designated as so-called super stations for intense study of atmospheric aerosols, sea ice, and sediment chemistry as well as water-column processes. In total, the set of coordinated international expeditions will involve the deployment of ice-capable research ships from 6 nations (US, Canada, Germany, Sweden, UK, and Russia) across different parts of the Arctic Ocean, and application of state-of-the-art methods to unravel the complex dynamics of trace metals and isotopes that are important as oceanographic and biogeochemical tracers in the sea.";
String projects_0_end_date "2017-06";
String projects_0_geolocation "Arctic Ocean; Sailing from Dutch Harbor to Dutch Harbor";
String projects_0_name "U.S. Arctic GEOTRACES Study";
String projects_0_project_nid "638812";
String projects_0_start_date "2014-07";
String projects_1_acronym "Arctic GEOTRACES Ra Th";
String projects_1_description
"NSF Award Abstract:
In this project, investigators participating in the 2015 U.S. GEOTRACES Arctic expedition will measure radium and thorium isotopes in the western Arctic Ocean. In common with other national initiatives in the International GEOTRACES Program, the goals of the U.S. Arctic expedition are to identify processes and quantify fluxes that control the distributions of key trace elements and isotopes in the ocean, and to establish the sensitivity of these distributions to changing environmental conditions. Some trace elements are essential to life, others are known biological toxins, and still others are important because they can be used as tracers of a variety of physical, chemical, and biological processes in the sea. The radionuclides to be measured as part of this project are important because they are oceanographic tracers that provide information on rates of cycling of other trace elements. The project will involve training opportunities for graduate student researchers and for undergraduate students from under-represented groups. Results from the study will be shared publicly through the Woods Hole Oceanographic Institution's Center for Marine and Environmental Radioactivity.
While other GEOTRACES projects will map the distribution of numerous trace elements and their isotopes (TEIs), their distribution cannot be properly interpreted without concurrent measurement of tracers capable of providing rates of internal TEI cycling processes and fluxes at boundaries and across interfaces. The isotopes to be measured in this project include a suite of uranium/thorium series radionuclides, including the shorter-lived 234-Th and 228-Th as well as the radium quartet (224-Ra, 223-Ra, 228-Ra, 226-Ra). These tracers have the appropriate half-lives and reactivities to allow for study of horizontal and vertical transport and mixing, as well as removal at ocean boundaries, supply via rivers and submarine groundwater discharge, surface scavenging and export and subsurface remineralization. The researchers have considerable experience developing and implementing the most efficient methods to sample and quantify this suite of tracers, which includes use of battery powered in-situ pumps for large volume sampling. Hence, in addition to the proposed work on uranium/thorium series radionuclides, the team will also provide a service to other GEOTRACES researchers by coordinating pump use and sampling for many essential particulate TEIs.";
String projects_1_end_date "2018-01";
String projects_1_geolocation "Western Arctic Ocean";
String projects_1_name "Collaborative Research: GEOTRACES Arctic Section: Radium and Thorium Isotopes as Natural Geochemical Tracers in the Arctic Ocean";
String projects_1_project_nid "718522";
String projects_1_start_date "2015-02";
String publisher_name "Biological and Chemical Oceanographic Data Management Office (BCO-DMO)";
String publisher_type "institution";
String sourceUrl "(local files)";
Float64 Southernmost_Northing 60.176;
String standard_name_vocabulary "CF Standard Name Table v55";
String subsetVariables "Cruise_ID";
String summary "Radium and thorium isotopes measured in the Western Arctic as part of the 2015 US GEOTRACES Arctic Cruise on the USCGC Healy (HLY1502) from August to October 2015.";
String time_coverage_end "2015-10-07T22:44Z";
String time_coverage_start "2015-08-12T21:50Z";
String title "[GN01 Radium and Thorium] - Radium and thorium isotopes measured in the Western Arctic as part of the 2015 US GEOTRACES Arctic Cruise on the USCGC Healy (HLY1502) from August to October 2015 (U.S. Arctic GEOTRACES Study)";
String version "3";
Float64 Westernmost_Easting -180.0;
String xml_source "osprey2erddap.update_xml() v1.3";
}
}
Data Access Protocol (DAP) and its
selection constraints.
The URL specifies what you want: the dataset, a description of the graph or the subset of the data, and the file type for the response.
Tabledap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/pmelTaoDySst.htmlTable?longitude,latitude,time,station,wmo_platform_code,T_25&time>=2015-05-23T12:00:00Z&time<=2015-05-31T12:00:00Z
Thus, the query is often a comma-separated list of desired variable names,
followed by a collection of
constraints (e.g., variable<value),
each preceded by '&' (which is interpreted as "AND").
For details, see the tabledap Documentation.