Accessing BCO-DMO data
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BCO-DMO ERDDAP
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| Dataset Title: | Dissolved REE concentrations and Nd isotopes from the US GEOTRACES Arctic USCGC Healy cruise HLY1502 from August to September 2015 
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| Institution: | BCO-DMO (Dataset ID: bcodmo_dataset_788315) |
| Information: | Summary
| License
| ISO 19115
| Metadata
| Background
| Subset
| Files
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Attributes {
s {
Cruise {
String bcodmo_name "cruise_id";
String description "Cruise identification (GN01; HLY1502)";
String long_name "Cruise";
String units "unitless";
}
STNNBR {
Byte _FillValue 127;
Byte actual_range 19, 43;
String bcodmo_name "station";
String description "Station number";
String long_name "STNNBR";
String units "unitless";
}
GEOTRC_SAMPNO {
Int16 _FillValue 32767;
Int16 actual_range 10888, 11613;
String bcodmo_name "sample";
String description "Unique GEOTRACES sample number";
String long_name "GEOTRC SAMPNO";
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 1.7, 3919.2;
String axis "Z";
String bcodmo_name "depth";
String description "Sample depth";
String ioos_category "Location";
String long_name "CTDDEPTH";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/DEPH/";
String positive "down";
String standard_name "depth";
String units "m";
}
DATE {
Int32 _FillValue 2147483647;
Int32 actual_range 20150823, 20150916;
String bcodmo_name "date";
String description "Date; format: yyyymmdd";
String long_name "DATE";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/";
String units "unitless";
}
time2 {
String bcodmo_name "time";
String description "Time (UTC); format: HHMM";
String long_name "TIME";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/AHMSAA01/";
String units "unitless";
}
latitude {
String _CoordinateAxisType "Lat";
Float64 _FillValue NaN;
Float64 actual_range 79.9835, 87.8259;
String axis "Y";
String bcodmo_name "latitude";
Float64 colorBarMaximum 90.0;
Float64 colorBarMinimum -90.0;
String description "Latitude";
String ioos_category "Location";
String long_name "Latitude";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/LATX/";
String standard_name "latitude";
String units "degrees_north";
}
longitude {
String _CoordinateAxisType "Lon";
Float64 _FillValue NaN;
Float64 actual_range -179.8086, 179.1997;
String axis "X";
String bcodmo_name "longitude";
Float64 colorBarMaximum 180.0;
Float64 colorBarMinimum -180.0;
String description "Longitude; negative = West";
String ioos_category "Location";
String long_name "Longitude";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/LONX/";
String standard_name "longitude";
String units "degrees_east";
}
La_D_CONC_BOTTLE {
Float32 _FillValue NaN;
Float32 actual_range 15.3, 59.7;
String bcodmo_name "trace_element_conc";
String description "Dissolved Concentration of Lanthanum (La) from bottle samples";
String long_name "La D CONC BOTTLE";
String units "picomoles per kilogram (pmol/kg)";
}
La_D_CONC_BOTTLE_QV_IODE {
Byte _FillValue 127;
Byte actual_range 1, 1;
String bcodmo_name "q_flag";
String description "La_D_CONC_BOTTLE data quality flag using IODE scheme";
String long_name "La D CONC BOTTLE QV IODE";
String units "unitless";
}
Ce_D_CONC_BOTTLE {
Float32 _FillValue NaN;
Float32 actual_range 3.0, 18.8;
String bcodmo_name "trace_element_conc";
String description "Dissolved Concentration of Cerium (Ce) from bottle samples";
String long_name "Ce D CONC BOTTLE";
String units "pmol/kg";
}
Ce_D_CONC_BOTTLE_QV_IODE {
Byte _FillValue 127;
Byte actual_range 1, 1;
String bcodmo_name "q_flag";
String description "Ce_D_CONC_BOTTLE data quality flag using IODE scheme";
String long_name "Ce D CONC BOTTLE QV IODE";
String units "unitless";
}
Pr_D_CONC_BOTTLE {
Float32 _FillValue NaN;
Float32 actual_range 2.68, 9.4;
String bcodmo_name "trace_element_conc";
String description "Dissolved Concentration of Praseodymium (Pr) from bottle samples";
String long_name "Pr D CONC BOTTLE";
String units "pmol/kg";
}
Pr_D_CONC_BOTTLE_QV_IODE {
Byte _FillValue 127;
Byte actual_range 1, 1;
String bcodmo_name "q_flag";
String description "Pr_D_CONC_BOTTLE data quality flag using IODE scheme";
String long_name "Pr D CONC BOTTLE QV IODE";
String units "unitless";
}
Nd_D_CONC_BOTTLE {
Float32 _FillValue NaN;
Float32 actual_range 12.7, 44.4;
String bcodmo_name "trace_element_conc";
String description "Dissolved Concentration of Neodymium (Nd) from bottle samples";
String long_name "Nd D CONC BOTTLE";
String units "pmol/kg";
}
Nd_D_CONC_BOTTLE_QV_IODE {
Byte _FillValue 127;
Byte actual_range 1, 1;
String bcodmo_name "q_flag";
String description "Nd_D_CONC_BOTTLE data quality flag using IODE scheme";
String long_name "Nd D CONC BOTTLE QV IODE";
String units "unitless";
}
Sm_D_CONC_BOTTLE {
Float32 _FillValue NaN;
Float32 actual_range 2.51, 8.93;
String bcodmo_name "trace_element_conc";
String description "Dissolved Concentration of Samarium (Sm) from bottle samples";
String long_name "Sm D CONC BOTTLE";
String units "pmol/kg";
}
Sm_D_CONC_BOTTLE_QV_IODE {
Byte _FillValue 127;
Byte actual_range 1, 1;
String bcodmo_name "q_flag";
String description "Sm_D_CONC_BOTTLE data quality flag using IODE scheme";
String long_name "Sm D CONC BOTTLE QV IODE";
String units "unitless";
}
Eu_D_CONC_BOTTLE {
Float32 _FillValue NaN;
Float32 actual_range 0.64, 2.79;
String bcodmo_name "trace_element_conc";
String description "Dissolved Concentration of Europium (Eu) from bottle samples";
String long_name "Eu D CONC BOTTLE";
String units "pmol/kg";
}
Eu_D_CONC_BOTTLE_QV_IODE {
Byte _FillValue 127;
Byte actual_range 1, 1;
String bcodmo_name "q_flag";
String description "Eu_D_CONC_BOTTLE data quality flag using IODE scheme";
String long_name "Eu D CONC BOTTLE QV IODE";
String units "unitless";
}
Gd_D_CONC_BOTTLE {
Float32 _FillValue NaN;
Float32 actual_range 3.75, 13.08;
String bcodmo_name "trace_element_conc";
String description "Dissolved Concentration of Gadolinium (Gd) from bottle samples";
String long_name "Gd D CONC BOTTLE";
String units "pmol/kg";
}
Gd_D_CONC_BOTTLE_QV_IODE {
Byte _FillValue 127;
Byte actual_range 1, 1;
String bcodmo_name "q_flag";
String description "Gd_D_CONC_BOTTLE data quality flag using IODE scheme";
String long_name "Gd D CONC BOTTLE QV IODE";
String units "unitless";
}
Tb_D_CONC_BOTTLE {
Float32 _FillValue NaN;
Float32 actual_range 0.62, 2.1;
String bcodmo_name "trace_element_conc";
String description "Dissolved Concentration of Terbium (Tb) from bottle samples";
String long_name "Tb D CONC BOTTLE";
String units "pmol/kg";
}
Tb_D_CONC_BOTTLE_QV_IODE {
Byte _FillValue 127;
Byte actual_range 1, 1;
String bcodmo_name "q_flag";
String description "Tb_D_CONC_BOTTLE data quality flag using IODE scheme";
String long_name "Tb D CONC BOTTLE QV IODE";
String units "unitless";
}
Dy_D_CONC_BOTTLE {
Float32 _FillValue NaN;
Float32 actual_range 4.51, 15.1;
String bcodmo_name "trace_element_conc";
String description "Dissolved Concentration of Dysprosium (Dy) from bottle samples";
String long_name "Dy D CONC BOTTLE";
String units "pmol/kg";
}
Dy_D_CONC_BOTTLE_QV_IODE {
Byte _FillValue 127;
Byte actual_range 1, 1;
String bcodmo_name "q_flag";
String description "Dy_D_CONC_BOTTLE data quality flag using IODE scheme";
String long_name "Dy D CONC BOTTLE QV IODE";
String units "unitless";
}
Ho_D_CONC_BOTTLE {
Float32 _FillValue NaN;
Float32 actual_range 1.17, 3.84;
String bcodmo_name "trace_element_conc";
String description "Dissolved Concentration of Holmium (Ho) from bottle samples";
String long_name "Ho D CONC BOTTLE";
String units "pmol/kg";
}
Ho_D_CONC_BOTTLE_QV_IODE {
Byte _FillValue 127;
Byte actual_range 1, 1;
String bcodmo_name "q_flag";
String description "Ho_D_CONC_BOTTLE data quality flag using IODE scheme";
String long_name "Ho D CONC BOTTLE QV IODE";
String units "unitless";
}
Er_D_CONC_BOTTLE {
Float32 _FillValue NaN;
Float32 actual_range 3.83, 12.01;
String bcodmo_name "trace_element_conc";
String description "Dissolved Concentration of Erbium (Er) from bottle samples";
String long_name "Er D CONC BOTTLE";
String units "pmol/kg";
}
Er_D_CONC_BOTTLE_QV_IODE {
Byte _FillValue 127;
Byte actual_range 1, 1;
String bcodmo_name "q_flag";
String description "Er_D_CONC_BOTTLE data quality flag using IODE scheme";
String long_name "Er D CONC BOTTLE QV IODE";
String units "unitless";
}
Tm_D_CONC_BOTTLE {
Float32 _FillValue NaN;
Float32 actual_range 0.55, 1.74;
String bcodmo_name "trace_element_conc";
String description "Dissolved Concentration of Thulium ( Tm) from bottle samples";
String long_name "Tm D CONC BOTTLE";
String units "pmol/kg";
}
Tm_D_CONC_BOTTLE_QV_IODE {
Byte _FillValue 127;
Byte actual_range 1, 1;
String bcodmo_name "q_flag";
String description "Tm_D_CONC_BOTTLE data quality flag using IODE scheme";
String long_name "Tm D CONC BOTTLE QV IODE";
String units "unitless";
}
Yb_D_CONC_BOTTLE {
Float32 _FillValue NaN;
Float32 actual_range 3.31, 11.43;
String bcodmo_name "trace_element_conc";
String description "Dissolved Concentration of Ytterbium (Yb) from bottle samples";
String long_name "Yb D CONC BOTTLE";
String units "pmol/kg";
}
Yb_D_CONC_BOTTLE_QV_IODE {
Byte _FillValue 127;
Byte actual_range 1, 1;
String bcodmo_name "q_flag";
String description "Yb_D_CONC_BOTTLE data quality flag using IODE scheme";
String long_name "Yb D CONC BOTTLE QV IODE";
String units "unitless";
}
Lu_D_CONC_BOTTLE {
Float32 _FillValue NaN;
Float32 actual_range 0.62, 2.0;
String bcodmo_name "trace_element_conc";
String description "Dissolved Concentration of Lutetium (Lu) from bottle samples";
String long_name "Lu D CONC BOTTLE";
String units "pmol/kg";
}
Lu_D_CONC_BOTTLE_QV_IODE {
Byte _FillValue 127;
Byte actual_range 1, 1;
String bcodmo_name "q_flag";
String description "Lu_D_CONC_BOTTLE data quality flag using IODE scheme";
String long_name "Lu D CONC BOTTLE QV IODE";
String units "unitless";
}
Nd_143_144_D_EPSILON_BOTTLE {
Float32 _FillValue NaN;
Float32 actual_range -12.25, -5.17;
String bcodmo_name "Neodymium isotope ratio";
String description "Isotopic ratio of neodymium 143/144 from bottle samples";
String long_name "Nd 143 144 D EPSILON BOTTLE";
String units "epsilon units";
}
Nd_143_144_D_EPSILON_BOTTLE_SD {
Float64 _FillValue NaN;
String bcodmo_name "Neodymium isotope ratio";
Float64 colorBarMaximum 50.0;
Float64 colorBarMinimum 0.0;
String description "1-sigma error of Epsilon Nd from bottle samples";
String long_name "Nd 143 144 D EPSILON BOTTLE SD";
String units "epsilon units";
}
Nd_143_144_D_EPSILON_BOTTLE_QV_IODE {
Byte _FillValue 127;
Byte actual_range 1, 9;
String bcodmo_name "q_flag";
String description "Nd_143_144_D_EPSILON_BOTTLE data quality flag using IODE scheme";
String long_name "Nd 143 144 D EPSILON BOTTLE QV IODE";
String units "unitless";
}
time {
String _CoordinateAxisType "Time";
Float64 actual_range 1.44036534e+9, 1.44239262e+9;
String axis "T";
String bcodmo_name "ISO_DateTime_UTC";
String description "Date and time (UTC) formatted to ISO8601 standard: yyyy-mm-ddTHH:MM";
String ioos_category "Time";
String long_name "ISO Date Time UTC";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/DTUT8601/";
String source_name "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";
}
}
NC_GLOBAL {
String access_formats ".htmlTable,.csv,.json,.mat,.nc,.tsv,.esriCsv,.geoJson,.odvTxt";
String acquisition_description
"Samples were filtered, acidified, and split at sea.\\u00a0Samples were
collected by Niskin bottle. Refer to the\\u00a0cruise report for more
information on cruise operations
([http://dmoserv3.whoi.edu/data_docs/GEOTRACES/Arctic/ARC01-report.pdf](\\\\\"http://dmoserv3.whoi.edu/data_docs/GEOTRACES/Arctic/ARC01-report.pdf\\\\\")).\\u00a0
For REE concentrations we removed an aliquot before pH-adjustment of each
sample. Sample methodology is modified from the Lab #3 methods in Behrens et
al. (2006) using a technique pioneered by Tachikawa et al. (1999). Samples
were spiked with a mixed 142Ce, 148Nd, and 176Yb enriched isotope spike blend,
and 10 ml of this spiked sample was preconcentrated offline using a SeaFast
PICO system (ESI). Resulting solutions were analysed at Oregon State
University (Corvallis, OR) using a Thermo X-Series II ICP-MS.
We prepared our 5L split for neodymium isotopic analysis following Shabani et
al. (1992). Samples were pH-adjusted to pH ~3.5, then pumped through 300
\\u00b5l of HDEHP in a C18 cartridge to capture REEs. Rare earth elements were
eluted from the cartridge using 6M HCl, then Nd was isolated using sequential
chromatographic columns: AG50-X8 (BioRad) and Ln-Spec (Eichrom). Neodymium
isotopic measurements were made at Oregon State University using a Nu Plasma 3
multicollector ICP-MS (Nu Instruments).
Problem report: Gaps in Nd isotope data are due to errors made during column
chromatography. Where the 2-sigma error of epsilon-Nd is \\u22650.7, data is
flagged with QV:IODE code 3, questionable/suspect quality.";
String awards_0_award_nid "763980";
String awards_0_award_number "OCE-1459513";
String awards_0_data_url "http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1459513";
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 "763986";
String awards_1_award_number "OCE-1458936";
String awards_1_data_url "http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1458936";
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 awards_2_award_nid "763990";
String awards_2_award_number "OCE-1459716";
String awards_2_data_url "http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1459716";
String awards_2_funder_name "NSF Division of Ocean Sciences";
String awards_2_funding_acronym "NSF OCE";
String awards_2_funding_source_nid "355";
String awards_2_program_manager "Henrietta N Edmonds";
String awards_2_program_manager_nid "51517";
String cdm_data_type "Other";
String comment
"Dissolved REE concentrations and Nd isotopes
PI: Brian Haley (Oregon State University)
Co-PIs: Steve Goldstein (Lamont-Doherty) & Howard Scher (University of South Carolina)
Version date: 24-Jan-2020";
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 "2020-01-24T20:41:23Z";
String date_modified "2020-02-11T21:48:22Z";
String defaultDataQuery "&time<now";
String doi "10.1575/1912/bco-dmo.788315.1";
Float64 Easternmost_Easting 179.1997;
Float64 geospatial_lat_max 87.8259;
Float64 geospatial_lat_min 79.9835;
String geospatial_lat_units "degrees_north";
Float64 geospatial_lon_max 179.1997;
Float64 geospatial_lon_min -179.8086;
String geospatial_lon_units "degrees_east";
Float64 geospatial_vertical_max 3919.2;
Float64 geospatial_vertical_min 1.7;
String geospatial_vertical_positive "down";
String geospatial_vertical_units "m";
String history
"2024-04-20T01:22:37Z (local files)
2024-04-20T01:22:37Z https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_788315.html";
String infoUrl "https://www.bco-dmo.org/dataset/788315";
String institution "BCO-DMO";
String instruments_0_acronym "Niskin bottle";
String instruments_0_dataset_instrument_nid "789091";
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_1_acronym "ICP Mass Spec";
String instruments_1_dataset_instrument_description "Neodymium isotopic measurements were made at Oregon State University using a Nu Plasma 3 multi-collector ICP-MS.";
String instruments_1_dataset_instrument_nid "788330";
String instruments_1_description "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.";
String instruments_1_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L05/current/LAB15/";
String instruments_1_instrument_name "Inductively Coupled Plasma Mass Spectrometer";
String instruments_1_instrument_nid "530";
String instruments_1_supplied_name "Nu Plasma 3 multi-collector ICP-MS";
String instruments_2_acronym "ICP Mass Spec";
String instruments_2_dataset_instrument_description "Rare earth element dissolved concentrations were analysed at Oregon State University using a Thermo X-Series II ICP-MS.";
String instruments_2_dataset_instrument_nid "788331";
String instruments_2_description "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.";
String instruments_2_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L05/current/LAB15/";
String instruments_2_instrument_name "Inductively Coupled Plasma Mass Spectrometer";
String instruments_2_instrument_nid "530";
String instruments_2_supplied_name "Thermo X-Series II ICP-MS";
String keywords "bco, bco-dmo, biological, bottle, Ce_D_CONC_BOTTLE, Ce_D_CONC_BOTTLE_QV_IODE, chemical, conc, cruise, ctddepth, data, dataset, date, dmo, Dy_D_CONC_BOTTLE, Dy_D_CONC_BOTTLE_QV_IODE, epsilon, Er_D_CONC_BOTTLE, Er_D_CONC_BOTTLE_QV_IODE, erddap, Eu_D_CONC_BOTTLE, Eu_D_CONC_BOTTLE_QV_IODE, exchange, Gd_D_CONC_BOTTLE, Gd_D_CONC_BOTTLE_QV_IODE, geotrc, GEOTRC_SAMPNO, Ho_D_CONC_BOTTLE, Ho_D_CONC_BOTTLE_QV_IODE, international, iode, iso, La_D_CONC_BOTTLE, La_D_CONC_BOTTLE_QV_IODE, latitude, longitude, Lu_D_CONC_BOTTLE, Lu_D_CONC_BOTTLE_QV_IODE, management, Nd_143_144_D_EPSILON_BOTTLE, Nd_143_144_D_EPSILON_BOTTLE_QV_IODE, Nd_143_144_D_EPSILON_BOTTLE_SD, Nd_D_CONC_BOTTLE, Nd_D_CONC_BOTTLE_QV_IODE, oceanographic, oceanography, office, Pr_D_CONC_BOTTLE, Pr_D_CONC_BOTTLE_QV_IODE, preliminary, sampno, Sm_D_CONC_BOTTLE, Sm_D_CONC_BOTTLE_QV_IODE, stnnbr, Tb_D_CONC_BOTTLE, Tb_D_CONC_BOTTLE_QV_IODE, time, time2, Tm_D_CONC_BOTTLE, Tm_D_CONC_BOTTLE_QV_IODE, Yb_D_CONC_BOTTLE, Yb_D_CONC_BOTTLE_QV_IODE";
String license "https://www.bco-dmo.org/dataset/788315/license";
String metadata_source "https://www.bco-dmo.org/api/dataset/788315";
Float64 Northernmost_Northing 87.8259;
String param_mapping "{'788315': {'LATITUDE': 'flag - latitude', 'CTDDEPTH': 'flag - depth', 'LONGITUDE': 'flag - longitude', 'ISO_DateTime_UTC': 'flag - time'}}";
String parameter_source "https://www.bco-dmo.org/mapserver/dataset/788315/parameters";
String people_0_affiliation "Oregon State University";
String people_0_affiliation_acronym "OSU";
String people_0_person_name "Brian Haley";
String people_0_person_nid "51382";
String people_0_role "Principal Investigator";
String people_0_role_type "originator";
String people_1_affiliation "Lamont-Doherty Earth Observatory";
String people_1_affiliation_acronym "LDEO";
String people_1_person_name "Steven L. Goldstein";
String people_1_person_nid "51618";
String people_1_role "Co-Principal Investigator";
String people_1_role_type "originator";
String people_2_affiliation "University of South Carolina";
String people_2_person_name "Howard Scher";
String people_2_person_nid "51619";
String people_2_role "Co-Principal Investigator";
String people_2_role_type "originator";
String people_3_affiliation "Woods Hole Oceanographic Institution";
String people_3_affiliation_acronym "WHOI BCO-DMO";
String people_3_person_name "Shannon Rauch";
String people_3_person_nid "51498";
String people_3_role "BCO-DMO Data Manager";
String people_3_role_type "related";
String project "U.S. GEOTRACES Arctic,Arctic GEOTRACES Nd/eNd";
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 Nd/eNd";
String projects_1_description
"NSF Award Abstract:
In this project, investigators participating in the 2015 U.S. GEOTRACES Arctic expedition will measure neodymium isotopes and rare earth elements in seawater, sediment, and particulates collected from 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. Neodymium and rare earth elements are oceanographic tracers, and data from this research will provide benchmarks for other trace element and isotope studies to better understand their cycles and how future environmental changes will impact this important ocean basin. The project will support the training of undergraduate, graduate, and post-doctoral researchers, and results will be disseminated via public outreach activities.
Neodymium (Nd) isotopes are tracers of water mass sources, transport and mixing, and rare earth elements (REEs) show systematic fractionations during environmental processes. Together they provide a powerful tool for analyzing provenances and processes in the oceans that reflect the changing environmental controls on the distribution of trace elements and their isotopes (TEIs). Inherent logistical difficulties make the Arctic Ocean especially scarce in TEI data (including Nd isotopes and REE concentrations), which hinders understanding and application of these tracers. In this study, researchers will examine Nd and REE concentrations in seawater, sediment, and particulate samples collected in the western Arctic Ocean, with the aim of (1) assessing Arctic circulation and water mass mixing in light of Nd isotopes and REEs; (2) attempting to quantify particle-dissolved exchanges of TEIs and; (3) using Nd isotopes and REEs to characterize the sources, sinks and exchanges of TEIs. It is expected that through improved understanding of the Nd isotope and REEs tracers, scientists will be able to relate these findings to other TEIs and to the broader understanding of Arctic oceanographic change in the past, present, and future.";
String projects_1_end_date "2020-02";
String projects_1_geolocation "Arctic Ocean";
String projects_1_name "Collaborative Research: GEOTRACES Arctic Section: Nd isotopes and REEs in the Arctic";
String projects_1_project_nid "763981";
String projects_1_project_website "http://www.geotraces.org/";
String projects_1_start_date "2015-03";
String publisher_name "Biological and Chemical Oceanographic Data Management Office (BCO-DMO)";
String publisher_type "institution";
String sourceUrl "(local files)";
Float64 Southernmost_Northing 79.9835;
String standard_name_vocabulary "CF Standard Name Table v55";
String subsetVariables "Cruise,La_D_CONC_BOTTLE_QV_IODE,Ce_D_CONC_BOTTLE_QV_IODE,Pr_D_CONC_BOTTLE_QV_IODE,Nd_D_CONC_BOTTLE_QV_IODE,Sm_D_CONC_BOTTLE_QV_IODE,Eu_D_CONC_BOTTLE_QV_IODE,Gd_D_CONC_BOTTLE_QV_IODE,Tb_D_CONC_BOTTLE_QV_IODE,Dy_D_CONC_BOTTLE_QV_IODE,Ho_D_CONC_BOTTLE_QV_IODE,Er_D_CONC_BOTTLE_QV_IODE,Tm_D_CONC_BOTTLE_QV_IODE,Yb_D_CONC_BOTTLE_QV_IODE,Lu_D_CONC_BOTTLE_QV_IODE,Nd_143_144_D_EPSILON_BOTTLE_SD";
String summary "Dissolved REE concentrations and Nd isotopes from the US GEOTRACES Arctic USCGC Healy cruise HLY1502 from August to September 2015.";
String time_coverage_end "2015-09-16T08:37Z";
String time_coverage_start "2015-08-23T21:29Z";
String title "Dissolved REE concentrations and Nd isotopes from the US GEOTRACES Arctic USCGC Healy cruise HLY1502 from August to September 2015";
String version "1";
Float64 Westernmost_Easting -179.8086;
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.