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Dataset Title:  Dissolved and labile cobalt from the USCGC Healy HLY1502 in the Canada and
Makarov Basins of the Arctic Ocean from August to October 2015 (U.S. GEOTRACES
Arctic project)
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Institution:  BCO-DMO   (Dataset ID: bcodmo_dataset_722472)
Range: longitude = -179.808 to 179.593°E, latitude = 60.165 to 89.995°N, depth = 1.0 to 4198.9m, time = 2015-08-12T15:54:00Z to (now?)
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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  Station_ID {
    Byte _FillValue 127;
    Byte actual_range 1, 66;
    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 "Sampling start date (UTC); format: MM/DD/YYYY";
    String long_name "Start Date UTC";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/";
    String source_name "Start_Date_UTC";
    String time_precision "1970-01-01";
    String units "unitless";
  }
  Start_Time_UTC {
    String bcodmo_name "time";
    String description "Sampling start time (UTC); 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 1.43939484e+9, NaN;
    String axis "T";
    String bcodmo_name "ISO_DateTime_UTC";
    String description "Sampling start date/time (UTC) formatted to ISO8601 standard: 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 standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  End_Date_UTC {
    String bcodmo_name "date";
    String description "Sampling end date (UTC); format: MM/DD/YYYY";
    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 "Sampling end time (UTC); 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 "Sampling endt date/time (UTC) formatted to ISO8601 standard: 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 units "unitless";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 _FillValue NaN;
    Float64 actual_range 60.165, 89.995;
    String axis "Y";
    String bcodmo_name "latitude";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String description "Sampling start latitude";
    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 -179.808, 179.593;
    String axis "X";
    String bcodmo_name "longitude";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String description "Sampling start longitude";
    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 60.165, 89.995;
    String bcodmo_name "latitude";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String description "Sampling end latitude";
    String long_name "Latitude";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/LATX/";
    String standard_name "latitude";
    String units "decimal degrees North";
  }
  End_Longitude {
    Float32 _FillValue NaN;
    Float32 actual_range -179.808, 179.593;
    String bcodmo_name "longitude";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String description "Sampling end longitude";
    String long_name "Longitude";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/LONX/";
    String standard_name "longitude";
    String units "decimal degrees East";
  }
  Event_ID {
    Int16 _FillValue 32767;
    Int16 actual_range 6009, 6491;
    String bcodmo_name "event";
    String description "GEOTRACES 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 10471, 12314;
    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 1.0, 4198.9;
    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";
  }
  Co_D_CONC_BOTTLE_iojqqp {
    Float32 _FillValue NaN;
    Float32 actual_range 19.4, 1852.1;
    String bcodmo_name "trace_metal_conc";
    String description "Concentration of dissolved Cobalt in bottle samples";
    String long_name "Co D CONC BOTTLE Iojqqp";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/C035/";
    String units "picomoles per liter (pmol/L)";
  }
  SD1_Co_D_CONC_BOTTLE_iojqqp {
    Byte _FillValue 127;
    Byte actual_range 2, 2;
    String bcodmo_name "trace_metal_conc";
    String description "One standard deviation of Co_D_CONC_BOTTLE_iojqqp";
    String long_name "SD1 Co D CONC BOTTLE Iojqqp";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/C035/";
    String units "picomoles per liter (pmol/L)";
  }
  Flag_Co_D_CONC_BOTTLE_iojqqp {
    Byte _FillValue 127;
    Byte actual_range 1, 3;
    String bcodmo_name "q_flag";
    Float64 colorBarMaximum 150.0;
    Float64 colorBarMinimum 0.0;
    String description "Quality flag for Co_D_CONC_BOTTLE_iojqqp";
    String long_name "Flag Co D CONC BOTTLE Iojqqp";
    String units "unitless";
  }
  Co_DL_CONC_BOTTLE_8zqltr {
    Float32 _FillValue NaN;
    Float32 actual_range 0.04, 650.6;
    String bcodmo_name "trace_metal_conc";
    String description "Concentration of dissolved labile Cobalt in bottle samples";
    String long_name "Co DL CONC BOTTLE 8zqltr";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/C035/";
    String units "picomoles per liter (pmol/L)";
  }
  SD1_Co_DL_CONC_BOTTLE_8zqltr {
    Byte _FillValue 127;
    Byte actual_range 2, 2;
    String bcodmo_name "trace_metal_conc";
    String description "One standard deviation of Co_DL_CONC_BOTTLE_8zqltr";
    String long_name "SD1 Co DL CONC BOTTLE 8zqltr";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/C035/";
    String units "picomoles per liter (pmol/L)";
  }
  Flag_Co_DL_CONC_BOTTLE_8zqltr {
    Byte _FillValue 127;
    Byte actual_range 1, 10;
    String bcodmo_name "q_flag";
    Float64 colorBarMaximum 150.0;
    Float64 colorBarMinimum 0.0;
    String description "Quality flag for Co_DL_CONC_BOTTLE_8zqltr";
    String long_name "Flag Co DL CONC BOTTLE 8zqltr";
    String units "unitless";
  }
  Co_D_CONC_BOAT_PUMP_cs8ogw {
    Float32 _FillValue NaN;
    Float32 actual_range 108.2, 849.0;
    String bcodmo_name "trace_metal_conc";
    String description "Concentration of dissolved Cobalt in samples collected from a small boat using a pump";
    String long_name "Co D CONC BOAT PUMP Cs8ogw";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/C035/";
    String units "picomoles per liter (pmol/L)";
  }
  SD1_Co_D_CONC_BOAT_PUMP_cs8ogw {
    Byte _FillValue 127;
    Byte actual_range 2, 2;
    String bcodmo_name "trace_metal_conc";
    String description "One standard deviation of Co_D_CONC_BOAT_PUMP_cs8ogw";
    String long_name "SD1 Co D CONC BOAT PUMP Cs8ogw";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/C035/";
    String units "picomoles per liter (pmol/L)";
  }
  Flag_Co_D_CONC_BOAT_PUMP_cs8ogw {
    Byte _FillValue 127;
    Byte actual_range 1, 1;
    String bcodmo_name "q_flag";
    Float64 colorBarMaximum 150.0;
    Float64 colorBarMinimum 0.0;
    String description "Quality flag for Co_D_CONC_BOAT_PUMP_cs8ogw";
    String long_name "Flag Co D CONC BOAT PUMP Cs8ogw";
    String units "unitless";
  }
  Co_DL_CONC_BOAT_PUMP_lthdda {
    Float32 _FillValue NaN;
    Float32 actual_range 15.2, 207.8;
    String bcodmo_name "trace_metal_conc";
    String description "Concentration of dissolved labile Cobalt in samples collected from a small boat using a pump";
    String long_name "Co DL CONC BOAT PUMP Lthdda";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/C035/";
    String units "picomoles per liter (pmol/L)";
  }
  SD1_Co_DL_CONC_BOAT_PUMP_lthdda {
    Byte _FillValue 127;
    Byte actual_range 2, 2;
    String bcodmo_name "trace_metal_conc";
    String description "One standard deviation of Co_DL_CONC_BOAT_PUMP_lthdda";
    String long_name "SD1 Co DL CONC BOAT PUMP Lthdda";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/C035/";
    String units "picomoles per liter (pmol/L)";
  }
  Flag_Co_DL_CONC_BOAT_PUMP_lthdda {
    Byte _FillValue 127;
    Byte actual_range 1, 2;
    String bcodmo_name "q_flag";
    Float64 colorBarMaximum 150.0;
    Float64 colorBarMinimum 0.0;
    String description "Quality flag for Co_DL_CONC_BOAT_PUMP_lthdda";
    String long_name "Flag Co DL CONC BOAT PUMP Lthdda";
    String units "unitless";
  }
 }
  NC_GLOBAL {
    String access_formats ".htmlTable,.csv,.json,.mat,.nc,.tsv,.esriCsv,.geoJson,.odvTxt";
    String acquisition_description 
"Samples were collected using the ODU GEOTRACES Carousel (GT-C), filtered
through 0.2 um Acropak filters in the GEOTRACES clean van and immediately
refrigerated. Acid-washed 60 mL LDPE bottles were filled entirely, leaving no
headspace. Total dissolved cobalt samples were kept at ambient pH, preserved
in a heat-sealed bag containing gas absorbing satchels immediately after
sample collection and kept at 4 degrees C until analysis upon return to the
Woods Hole laboratory. Labile cobalt were kept at ambient pH, and sampled in
separate bottles stored in plastic bags without gas absorbing satchels at 4
degrees C.
 
The carousel was used to collect samples from surface to near bottom waters.
Additional samples were collected from a surface pump when sea ice conditions
permitted. Pre-conditioned, teflon-coated 12L Go-Flo sampling bottles (General
Oceanics, Miami, FL) were deployed on a polyurethane powder-coated aluminum
rosette with titanium pilings and pressure housings (Sea-Bird Electronics,
Inc., Bellevue, WA) attached to a Kevlar, non-metallic conducting cable. For
more information regarding carousel deployment, please refer to the GEOTRACES
Cookbook, cited below and located on the GEOTRACES Program website
([https://www.geotraces.org/](\\\\\"https://www.geotraces.org/\\\\\")). Following
carousel retrieval, Go-Flo bottles were moved to the GEOTRACES Program
class-100 trace metal clean van, and pressurized with HEPA filtered air for
sampling in accordance with published methods (Cutter and Bruland 2012).
Surface pump samples were collected by zodiac, and a trace metal clean
peristaltic pump following the GEOTRACES Program Cookbook sampling
recommendations, and in accordance with previous collection protocols (Bruland
et al. 2005).
 
Sample storage and reagent bottles were soaked for >1 week in the acidic
detergent Citranox, rinsed thoroughly with 18.2 M-Ohm Milli-Q water
(Millipore), filled with 10% HCl to soak for 10 days, and rinsed thoroughly
with Milli-Q water adjusted to pH 2 with TM-grade HCl. Reagent purification
protocols were identical to those previously published (Saito and Moffett
2001).
 
Concentrations of total dissolved cobalt and labile cobalt were determined
using a previously described cathodic stripping voltammetry (CSV) method
(Saito and Moffett 2001, Saito et al. 2004). Measurements were made using the
Eco-Chemie \\u00b5AutolabIII systems connected to Metrohm 663 VA Stands
equipped with hanging mercury drop electrodes and Teflon sampling cups. Sample
preparation was modified slightly to accommodate use of a Metrohm 837 Sample
processor, operated with NOVA 1.8 software (Metrohm Autolab B.V.).
 
For total dissolved cobalt analyses, samples were UV-irradiated for 1 h prior
to analysis in a Metrohm 909 UV digester to degrade the organic ligands that
bind cobalt, enabling full chelation by the added electroactive ligand,
dimethylglyoxime (DMG). 11 ml of sample was pipetted into 15ml polypropylene
tubes. Recrystallized DMG (0.1M in methanol) was added to a final
concentration of 400 uM and purified
N-(2-hydroxyethyl)piperazine-N-(3-propanesulfonic acid) (EPPS) buffer (0.5 M
in Milli-Q water) was added to a final concentration of 3.8 mM. Tubes were
inverted several times before being placed in the autosampler queue, where 8.5
ml of the mixture was dosed into the teflon analysis cup using a 800 Dosino
automated burrette (Metrohm). 1.5 ml of purified sodium nitrite (1.5M in
Milli-Q water) was added directly to the Teflon cup using a dedicated 800
Dosino burrette. Once loaded, samples were purged with high purity (>99.99%)
N2 for 3 min and cobalt concentrations were determined by standard addition,
with triplicate measurement of the sample followed by four 25 pM cobalt
additions. 5 nM Co stock was diluted from a certified 1ppm reference (SPEX)
and added to the analysis cup via a third Dosino burrette.
 
For labile cobalt analyses, 11 ml of sample were pipetted into acid washed
teflon vials, preconditioned with a small aliquot of sample water. DMG was
added to a concentration of 400 uM and allowed to equilibrate for 8-16hr in
the dark prior to analysis (Saito et al. 2004). EPPS was added just prior to
measurement using the same standard addition protocol described above.
Previously, we determined that natural cobalt ligands in seawater have a
conditional stability constant of >10^16.8 (Saito et al. 2005). This suggests
that the cobalt is very strongly bound to ligands. Thus, we define labile
cobalt as the fraction of total dissolved cobalt that is either bound to weak
organic and inorganic ligands in seawater or present as free Co(II), and is
then exchangeable with the complexing agent (DMG) used for analysis (Saito et
al. 2004, Saito et al. 2005). The difference between the total dissolved
cobalt and the labile cobalt can then be used as an estimation of the strong
cobalt ligand concentration. The same electrode was used for both total and
labile analyses. Before transitioning from labile analyses to total analyses,
the autosampler tubing and Teflon cup were rinsed with Milli-Q water and pH2
HCl in Milli-Q water.
 
The analytical blank was determined by analyzing seawater that had been UV-
irradiated for 1 h, equilibrated overnight with prepared Chelex 100 resin
beads (Bio-Rad), and UV-irradiated a second time to degrade any leached
synthetic ligands. For in lab analyses, mean blank was 2.5 +/- 0.7 pM (n=19),
and the detection limit was 2.2 pM.
 
Intercalibration: GEOTRACES standard seawater and internal standard lab
seawater were analyzed periodically. A large batch of UV oligotrophic seawater
was generated prior to sample analyses and used as a primary standard during
measurements. This standard seawater was run along with each sample batch, as
were blanks, and values were consistent for the duration of analyses. Our
laboratory has participated in the GEOTRACES intercalibration effort using
this electrochemical Co method. Acidified standards were neutralized with
concentrated ammonium hydroxide (Seastar), mixing the entire sample between
drops, prior to UV digestion. We report our laboratory values for the
GEOTRACES and SAFe standard analyses using this electrochemical method to be:
SAFe D1 = 47.9 +/- 2.1 (n=3), SAFe D2 = 45.2 +/- 2.1 (n=3), GEOTRACES GSP =
2.4 +/- 1.8 (n=3), GEOTRACES GSC = 77.9 +/- 2.8 (n=3). These results are in
good agreement with those from the GEOTRACES intercalibration effort for Co
and demonstrate that the methodologies employed to produce this dataset detect
concentrations within the standard deviation of current consensus values for
UV irradiated samples, which can be found on the International GEOTRACES
Program website
([https://www.geotraces.org/](\\\\\"https://www.geotraces.org/\\\\\")).";
    String awards_0_award_nid "722367";
    String awards_0_award_number "OCE-1435056";
    String awards_0_data_url "http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1435056";
    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 cdm_data_type "Other";
    String comment 
"Dissolved and Labile Cobalt 
   U.S. GEOTRACES Arctic Cruise HLY1502 (GN01)  
  PI: Mak Saito (WHOI) 
  Version history:  
   07 July 2020. v2 (current) - replaced with GEOTRACES DOoR/IDP formatted file. 
   05 January 2018. v1. - original.";
    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 dataset_current_state "Final and no updates";
    String date_created "2018-01-05T19:27:28Z";
    String date_modified "2020-07-07T15:23:20Z";
    String defaultDataQuery "&amp;time&lt;now";
    String doi "10.26008/1912/bco-dmo.722472.2";
    Float64 Easternmost_Easting 179.593;
    Float64 geospatial_lat_max 89.995;
    Float64 geospatial_lat_min 60.165;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 179.593;
    Float64 geospatial_lon_min -179.808;
    String geospatial_lon_units "degrees_east";
    Float64 geospatial_vertical_max 4198.9;
    Float64 geospatial_vertical_min 1.0;
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String history 
"2022-09-28T19:48:54Z (local files)
2022-09-28T19:48:54Z https://erddap.bco-dmo.org/tabledap/bcodmo_dataset_722472.das";
    String infoUrl "https://www.bco-dmo.org/dataset/722472";
    String institution "BCO-DMO";
    String instruments_0_acronym "GO-FLO";
    String instruments_0_dataset_instrument_description "Pre-conditioned, teflon-coated 12L Go-Flo sampling bottles (General Oceanics, Miami, FL) were deployed on a polyurethane powder-coated aluminum rosette with titanium pilings and pressure housings (Sea-Bird Electronics, Inc., Bellevue, WA) attached to a Kevlar, non-metallic conducting cable.";
    String instruments_0_dataset_instrument_nid "722591";
    String instruments_0_description "GO-FLO bottle cast used to collect water samples for pigment, nutrient, plankton, etc. The GO-FLO sampling bottle is specially designed to avoid sample contamination at the surface, internal spring contamination, loss of sample on deck (internal seals), and exchange of water from different depths.";
    String instruments_0_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L05/current/30/";
    String instruments_0_instrument_name "GO-FLO Bottle";
    String instruments_0_instrument_nid "411";
    String instruments_1_acronym "Pump surface";
    String instruments_1_dataset_instrument_description "Surface pump samples were collected by zodiac, and a trace metal clean peristaltic pump following the GEOTRACES Program Cookbook sampling recommendations, and in accordance with previous collection protocols (Bruland et al. 2004).";
    String instruments_1_dataset_instrument_nid "722619";
    String instruments_1_description "A source of uncontaminated near-surface seawater pumped onto the deck of the research vessel that can be sampled and analyzed. This pumped seawater supply is from an over-the-side pumping system, and is therefore different from the vessel underway seawater system.";
    String instruments_1_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L05/current/31/";
    String instruments_1_instrument_name "Pump surface";
    String instruments_1_instrument_nid "619";
    String instruments_2_acronym "Metrohm 663 VA";
    String instruments_2_dataset_instrument_description "Measurements were made using the Eco-Chemie µAutolabIII systems connected to Metrohm 663 VA Stands equipped with hanging mercury drop electrodes and Teflon sampling cups.";
    String instruments_2_dataset_instrument_nid "722620";
    String instruments_2_description "The Metrohm 663 VA stand forms the wet chemical part of a polarographic and voltammetric analytical system. It features a mercury electrode, an Ag/AgCl reference electrode and a glassy carbon counter electrode. The size of the mercury drop and the stirrer speed are set manually on the VA Stand. The VA Stand can be operated in Dropping Mercury Electrode (DME), Hanging Mercury Drop Electrode (HMDE) and Static Mercury Drop Electrode (SMDE) modes. The VA Stand can be controlled by a potentiostat in conjunction with the Metrohm IME663 interface.";
    String instruments_2_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L22/current/TOOL0515/";
    String instruments_2_instrument_name "Metrohm 663 VA Stand mercury electrode";
    String instruments_2_instrument_nid "697";
    String instruments_3_acronym "Voltammetry Analyzers";
    String instruments_3_dataset_instrument_description "Concentrations of total dissolved cobalt and labile cobalt were determined using a previously described cathodic stripping voltammetry (CSV) method (Saito and Moffett 2001, Saito et al. 2004). Measurements were made using the Eco-Chemie µAutolabIII systems connected to Metrohm 663 VA Stands equipped with hanging mercury drop electrodes and Teflon sampling cups.";
    String instruments_3_dataset_instrument_nid "722621";
    String instruments_3_description "Instruments that obtain information about an analyte by applying a potential and measuring the current produced in the analyte.";
    String instruments_3_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L05/current/LAB35/";
    String instruments_3_instrument_name "Voltammetry Analyzers";
    String instruments_3_instrument_nid "698";
    String keywords "8zqltr, bco, bco-dmo, biological, boat, bottle, chemical, Co_D_CONC_BOAT_PUMP_cs8ogw, Co_D_CONC_BOTTLE_iojqqp, Co_DL_CONC_BOAT_PUMP_lthdda, Co_DL_CONC_BOTTLE_8zqltr, conc, cs8ogw, 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_Co_D_CONC_BOAT_PUMP_cs8ogw, Flag_Co_D_CONC_BOTTLE_iojqqp, Flag_Co_DL_CONC_BOAT_PUMP_lthdda, Flag_Co_DL_CONC_BOTTLE_8zqltr, iojqqp, iso, latitude, longitude, lthdda, management, oceanography, office, preliminary, pump, sample, Sample_Depth, Sample_ID, sd1, SD1_Co_D_CONC_BOAT_PUMP_cs8ogw, SD1_Co_D_CONC_BOTTLE_iojqqp, SD1_Co_DL_CONC_BOAT_PUMP_lthdda, SD1_Co_DL_CONC_BOTTLE_8zqltr, start, Start_ISO_DateTime_UTC, Start_Time_UTC, station, Station_ID, time";
    String license "https://www.bco-dmo.org/dataset/722472/license";
    String metadata_source "https://www.bco-dmo.org/api/dataset/722472";
    Float64 Northernmost_Northing 89.995;
    String param_mapping "{'722472': {'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/722472/parameters";
    String people_0_affiliation "Woods Hole Oceanographic Institution";
    String people_0_affiliation_acronym "WHOI";
    String people_0_person_name "Mak A. Saito";
    String people_0_person_nid "50985";
    String people_0_role "Principal Investigator";
    String people_0_role_type "originator";
    String people_1_affiliation "Woods Hole Oceanographic Institution";
    String people_1_affiliation_acronym "WHOI BCO-DMO";
    String people_1_person_name "Shannon Rauch";
    String people_1_person_nid "51498";
    String people_1_role "BCO-DMO Data Manager";
    String people_1_role_type "related";
    String project "U.S. GEOTRACES Arctic,GEOTRACES Arctic Bioactive Trace Metals";
    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 "GEOTRACES Arctic Bioactive Trace Metals";
    String projects_1_description 
"NSF Award Abstract:
In this project, a group of investigators participating in the 2015 U.S.GEOTRACES Arctic expedition will study the chemistry and regional distribution of seven trace metals in the Arctic Ocean: iron, manganese, zinc, cadmium, copper, nickel, and cobalt. These so-called bioactive metals are of special scientific interest because of their role in multiple biogeochemical processes including biological production of the sea and the planetary cycling of carbon and nitrogen. Like other multinational 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. This study in particular would contribute to our understanding of the sources and sinks of these seven bioactive metals as well as examine their interaction with biological processes. The project will focus on two major overarching research questions: (1) What are the sources and sinks for micronutrients and macronutrients in the Arctic? And (2) How does bioactive trace element nutrition influence productivity and species composition in the Arctic, and conversely, how do biological processes influence the cycling of these metals? In terms of broader impacts, the PIs on this project will be actively involved in educational outreach efforts, and the research team itself will include two postdoctoral researchers and a graduate student. The team leaders also plan to publish a children's ocean education book based on the expedition with the aim of generating next-generation excitement about modern ocean science
With regard to technical specifics, the research team will measure the dissolved seawater phases of the bioactive metals Fe, Mn, Zn, Cd, Cu, Ni, and Co, the dissolved stable metal isotopes 56Fe, 66Zn, and 114Cd, and the chemical speciation of Co. The recent development of methods for multi-element and multi-isotope analysis methods, in conjunction with the high-resolution sampling of the GEOTRACES program, make it possible to efficiently produce this dense dataset of metals and metal isotopes. This will be a team-based approach to achieve comprehensive duplication for analysis of the key parameters of dissolved metal concentrations. Each investigator will further conduct specialized additional measurements of metal isotopes and dissolved Co (which has unique analytical challenges) and Co speciation. Interpretation of these rich datasets would will be directed toward determination of sources and sinks as well as their ecological stoichiometry, in collaboration with other U.S.GEOTRACES participants measuring synergistic parameters. Together, this Arctic Ocean bioactive trace metal dataset is expected to provide an important contribution to the understanding of micronutrient roles in Arctic biogeochemical processes. These results should also be highly relevant to research studies of the ancient ocean, in which trace-metal analyses are commonly used to trace a wide variety of processes including paleo-ocean circulation and biological productivity. Finally, understanding the sources and sinks for elements in the modern ocean is key to predicting how the concentrations of bioactive elements might vary in a changing future climate.";
    String projects_1_end_date "2019-11";
    String projects_1_geolocation "Arctic Ocean";
    String projects_1_name "Collaborative Research: GEOTRACES Arctic Section: Marine Cycling of Bioactive Trace Metals in the Arctic Ocean";
    String projects_1_project_nid "722368";
    String projects_1_start_date "2014-12";
    String publisher_name "Biological and Chemical Oceanographic Data Management Office (BCO-DMO)";
    String publisher_type "institution";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 60.165;
    String standard_name_vocabulary "CF Standard Name Table v55";
    String summary "Dissolved and labile cobalt from the USCGC Healy HLY1502 in the Canada and Makarov Basins of the Arctic Ocean from August to October 2015 (U.S. GEOTRACES Arctic project).";
    String time_coverage_start "2015-08-12T15:54:00Z";
    String title "Dissolved and labile cobalt from the USCGC Healy HLY1502 in the Canada and Makarov Basins of the Arctic Ocean from August to October 2015 (U.S. GEOTRACES Arctic project)";
    String version "2";
    Float64 Westernmost_Easting -179.808;
    String xml_source "osprey2erddap.update_xml() v1.5";
  }
}

 

Using tabledap to Request Data and Graphs from Tabular Datasets

tabledap lets you request a data subset, a graph, or a map from a tabular dataset (for example, buoy data), via a specially formed URL. tabledap uses the OPeNDAP (external link) Data Access Protocol (DAP) (external link) and its selection constraints (external link).

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.


 
ERDDAP, Version 2.02
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