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Dataset Title:  Barium concentration and isotopic data from SAFe, collected during the 2nd
GEOTRACES Intercalibration cruise (R/V Knorr KN195-08) in the eastern North
Pacific during May 2009
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Institution:  BCO-DMO   (Dataset ID: bcodmo_dataset_770368)
Information:  Summary ? | License ? | ISO 19115 | Metadata | Background (external link) | Files | Make a graph
 
Variable ?   Optional
Constraint #1 ?
Optional
Constraint #2 ?
   Minimum ?
 
   Maximum ?
 
 GEOTRC_EVENTNO (unitless) ?          2075    2085
 latitude (degrees_north) ?          30.0    30.0003
  < slider >
 longitude (degrees_east) ?          -140.0003    -140.0
  < slider >
 Filter_type (unitless) ?          "Acropak (0.2 um)"    "Sartobran (0.2 um)"
 GEOTRC_SAMPNO (unitless) ?          4601    4791
 depth (m) ?          5.0    4500.0
  < slider >
 Ba_D_CONC_BOTTLE (nanomoles per kilogram (nmol/kg)) ?          34.96    158.24
 Ba_D_CONC_BOTTLE_stdev (nmol/kg) ?          0.44    1.98
 Ba_D_CONC_BOTTLE_FLAG (unitless) ?          1    2
 Ba_138_134_D_DELTA_BOTTLE (per mil deviation rel. to NIST SRM 3104a) ?          0.216    0.617
 Ba_138_134_D_DELTA_BOTTLE_stdev (per mil) ?          0.015    0.022
 Ba_138_134_D_DELTA_BOTTLE_FLAG (unitless) ?          1    2
 Notes (unitless) ?          "NaN"    "See Problem Report"
 
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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  GEOTRC_EVENTNO {
    Int16 _FillValue 32767;
    Int16 actual_range 2075, 2085;
    String bcodmo_name "event";
    String description "The event # from the cruise report";
    String long_name "GEOTRC EVENTNO";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/EVTAGFL/";
    String units "unitless";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 _FillValue NaN;
    Float64 actual_range 30.0, 30.0003;
    String axis "Y";
    String bcodmo_name "latitude";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String description "Latitude (positive values = North)";
    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 -140.0003, -140.0;
    String axis "X";
    String bcodmo_name "longitude";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String description "Longitude (negative values = West)";
    String ioos_category "Location";
    String long_name "Longitude";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/LONX/";
    String source_name "long";
    String standard_name "longitude";
    String units "degrees_east";
  }
  Filter_type {
    String bcodmo_name "filter_size";
    String description "Type (and cutoff) of filter used";
    String long_name "Filter Type";
    String units "unitless";
  }
  GEOTRC_SAMPNO {
    Int16 _FillValue 32767;
    Int16 actual_range 4601, 4791;
    String bcodmo_name "sample";
    String description "Unique GEOTRACES sample ID";
    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 5.0, 4500.0;
    String axis "Z";
    String bcodmo_name "depth";
    Float64 colorBarMaximum 8000.0;
    Float64 colorBarMinimum -8000.0;
    String colorBarPalette "TopographyDepth";
    String description "Sample depth";
    String ioos_category "Location";
    String long_name "Depth";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/DEPH/";
    String positive "down";
    String standard_name "depth";
    String units "m";
  }
  Ba_D_CONC_BOTTLE {
    Float32 _FillValue NaN;
    Float32 actual_range 34.96, 158.24;
    String bcodmo_name "Ba";
    String description "Dissolved Ba (barium) concentration";
    String long_name "Ba D CONC BOTTLE";
    String units "nanomoles per kilogram (nmol/kg)";
  }
  Ba_D_CONC_BOTTLE_stdev {
    Float32 _FillValue NaN;
    Float32 actual_range 0.44, 1.98;
    String bcodmo_name "Ba";
    String description "One-sigma uncertainty about the barium concentration";
    String long_name "Ba D CONC BOTTLE Stdev";
    String units "nmol/kg";
  }
  Ba_D_CONC_BOTTLE_FLAG {
    Byte _FillValue 127;
    Byte actual_range 1, 2;
    String bcodmo_name "q_flag";
    Float64 colorBarMaximum 150.0;
    Float64 colorBarMinimum 0.0;
    String description "ODV quality flag for Ba_D_CONC_BOTTLE";
    String long_name "Ba D CONC BOTTLE FLAG";
    String units "unitless";
  }
  Ba_138_134_D_DELTA_BOTTLE {
    Float32 _FillValue NaN;
    Float32 actual_range 0.216, 0.617;
    String bcodmo_name "Ba";
    String description "Dissolved Ba-isotopic composition";
    String long_name "Ba 138 134 D DELTA BOTTLE";
    String units "per mil deviation rel. to NIST SRM 3104a";
  }
  Ba_138_134_D_DELTA_BOTTLE_stdev {
    Float32 _FillValue NaN;
    Float32 actual_range 0.015, 0.022;
    String bcodmo_name "Ba";
    String description "One-sigma uncertainty about the dissolved Ba-isotopic composition";
    String long_name "Ba 138 134 D DELTA BOTTLE Stdev";
    String units "per mil";
  }
  Ba_138_134_D_DELTA_BOTTLE_FLAG {
    Byte _FillValue 127;
    Byte actual_range 1, 2;
    String bcodmo_name "q_flag";
    Float64 colorBarMaximum 150.0;
    Float64 colorBarMinimum 0.0;
    String description "ODV quality flag for Ba_138_134_D_DELTA_BOTTLE";
    String long_name "Ba 138 134 D DELTA BOTTLE FLAG";
    String units "unitless";
  }
  Notes {
    String bcodmo_name "comment";
    String description "Any issues or concerns";
    String long_name "Notes";
    String units "unitless";
  }
 }
  NC_GLOBAL {
    String access_formats ".htmlTable,.csv,.json,.mat,.nc,.tsv,.esriCsv,.geoJson";
    String acquisition_description 
"Samples were collected on the GEOTRACES carousel, filtered to 0.2 \\u03bcm or
0.45 \\u03bcm (depending on filter type), acidified to pH \\u2248 2 with
hydrochloric acid, and stored for several years prior to processing. Aliquots
containing five milliliters of seawater were cleanly subsampled from each
sample, weighed, and an appropriate quantity of
\\u00b9\\u00b3\\u2076Ba\\u2013\\u00b9\\u00b3\\u2075Ba double spike added. Following
spike\\u2013sample equilibration, barium was co-precipitated with calcium
carbonate via dropwise addition of sodium carbonate. The resultant precipitate
was dissolved in hydrochloric acid and twice passed through cation-exchange
columns to purify Ba from matrix elements.
 
Samples were aspirated, desolvated, and analyzed using a 100 \\u03bcL/min
nebulizer, Aridus II desolvation system, and ThermoFisher Neptune multi-
collector ICP-MS, respectively. All instrumentation was sitated at the WHOI
Plasma Facility. Barium-isotopic compositions were calculated from
simultaneous monitoring of ion beams corresponding to m/z 131 (Xe, xenon), 135
(Ba), 136 (Xe; Ba; Ce, cerium), 137 (Ba), 138 (Ba; La, lanthanum; Ce), 139
(La) and 140 (Ce).
 
Problem report:  
 Sample 4722 (surface) unclear if sample was filtered, and\\u2014if
so\\u2014what filter cutoff was used.";
    String awards_0_award_nid "770289";
    String awards_0_award_number "OCE-1736949";
    String awards_0_data_url "http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1736949";
    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 
"Barium concentration and isotopic data from SAFe,  
   collected during the 2nd GEOTRACES Intercalibration cruise (KN195-08) 
  PI: Tristan Horner (WHOI) 
  Version history: 
   06 Aug 2019  (current) - version 2; correction made to values in Ba_138_134_D_DELTA_BOTTLE column. 
   28 June 2019 - version 1 served by BCO-DMO. 
  Quality flags follow ODV scheme:  
   1=Good value; 2=Probably good value; 3=Probably bad value; 6=Value below detection limit";
    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 "2019-06-10T16:46:11Z";
    String date_modified "2019-08-06T17:59:56Z";
    String defaultDataQuery "&amp;time&lt;now";
    String doi "10.1575/1912/bco-dmo.770368.2";
    Float64 Easternmost_Easting -140.0;
    Float64 geospatial_lat_max 30.0003;
    Float64 geospatial_lat_min 30.0;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -140.0;
    Float64 geospatial_lon_min -140.0003;
    String geospatial_lon_units "degrees_east";
    Float64 geospatial_vertical_max 4500.0;
    Float64 geospatial_vertical_min 5.0;
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String history 
"2020-10-22T15:42:20Z (local files)
2020-10-22T15:42:20Z https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_770368.html";
    String infoUrl "https://www.bco-dmo.org/dataset/770368";
    String institution "BCO-DMO";
    String instruments_0_acronym "GO-FLO";
    String instruments_0_dataset_instrument_nid "770400";
    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_0_supplied_name "GEOTRACES carousel";
    String instruments_1_acronym "ICP Mass Spec";
    String instruments_1_dataset_instrument_nid "770402";
    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 "ThermoFisher Neptune multi-collector ICP-MS";
    String instruments_2_acronym "GeoFish";
    String instruments_2_dataset_instrument_nid "770401";
    String instruments_2_description "The GeoFish towed sampler is a custom designed near surface (";
    String instruments_2_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L05/current/31/";
    String instruments_2_instrument_name "GeoFish Towed near-Surface Sampler";
    String instruments_2_instrument_nid "549";
    String keywords "Ba_138_134_D_DELTA_BOTTLE, Ba_138_134_D_DELTA_BOTTLE_FLAG, Ba_138_134_D_DELTA_BOTTLE_stdev, Ba_D_CONC_BOTTLE, Ba_D_CONC_BOTTLE_FLAG, Ba_D_CONC_BOTTLE_stdev, bco, bco-dmo, biological, bottle, chemical, conc, data, dataset, delta, depth, deviation, dmo, erddap, eventno, filter, Filter_type, flag, geotrc, GEOTRC_EVENTNO, GEOTRC_SAMPNO, latitude, longitude, management, notes, oceanography, office, preliminary, sampno, standard, standard deviation, stdev, type";
    String license "https://www.bco-dmo.org/dataset/770368/license";
    String metadata_source "https://www.bco-dmo.org/api/dataset/770368";
    Float64 Northernmost_Northing 30.0003;
    String param_mapping "{'770368': {'lat': 'flag - latitude', 'Depth': 'flag - depth', 'long': 'flag - longitude'}}";
    String parameter_source "https://www.bco-dmo.org/mapserver/dataset/770368/parameters";
    String people_0_affiliation "Woods Hole Oceanographic Institution";
    String people_0_affiliation_acronym "WHOI";
    String people_0_person_name "Tristan J. Horner";
    String people_0_person_nid "680928";
    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 "GEOTRACES PMT Barium";
    String projects_0_acronym "GEOTRACES PMT Barium";
    String projects_0_description 
"NSF Award Abstract:
The goal of the international GEOTRACES program is to understand the distributions of trace chemical elements and their isotopes in the oceans. This project would measure stable isotopes of barium on a 2018 U.S. GEOTRACES expedition in the Pacific Ocean. Barium is a trace element whose distribution is relevant to all three themes of the GEOTRACES program, as barium can be used to: study chemical cycling within the oceans; trace exchanges of elements at ocean boundaries; and infer past environmental conditions. The data collected here will be the first of their kind for barium isotopes and will illuminate the geochemical cycle of this element. Moreover, conducting this work as part of the GEOTRACES program will maximize the return on investment in the barium isotope data by providing a rich interpretative framework.
This project seeks to understand how the interplay between internal cycling and boundary processes sets basin-scale barium concentration and isotopic distributions in the Pacific Ocean. Despite possessing a nutrient-like dissolved profile, marine barium cycling has a fundamentally different boundary condition to the major algal nutrients: barium cycling is not driven by production of organic matter but rather by its remineralization. Respiration of sinking organic matter in the ocean's 'twilight zone' releases carbon dioxide, mineralizes nutrients, and promotes precipitation of micron-size crystals of barite. Since barite is the major vector of particulate barium in seawater, the abundance and isotopic composition of barium in the oceans is tied to global carbon and nutrient cycling at the 'dark end' of the biological carbon pump. The data collected here will be used to test hypotheses across an unprecedented range of oceanographic conditions regarding: the formation, export, and regeneration of particulate material and the connection to seafloor processes; the importance of boundary sources to regional and global trace element and isotope budgets; the formation of putative soft-metal sulfides in oxygen-minimum zones; and the origin of enigmatic suspended particles in the deep open ocean. This proposal will contribute to education by training undergraduate research fellows and through presentation of seminars and guest lectures to regional science educators through collaboration with a regional conservation organization.";
    String projects_0_end_date "2020-12";
    String projects_0_name "U.S. GEOTRACES Pacific Meridional Transect: Tracing Basin-scale Nutrient Cycling and Carbon Export with Dissolved and Particulate Barium-isotopic Distributions";
    String projects_0_project_nid "770290";
    String projects_0_start_date "2018-01";
    String publisher_name "Biological and Chemical Oceanographic Data Management Office (BCO-DMO)";
    String publisher_type "institution";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 30.0;
    String standard_name_vocabulary "CF Standard Name Table v55";
    String summary "Barium concentration and isotopic data from SAFe, collected during the 2nd GEOTRACES Intercalibration cruise, KN195-08, on R/V Knorr in the eastern North Pacific during May 2009.";
    String title "Barium concentration and isotopic data from SAFe, collected during the 2nd GEOTRACES Intercalibration cruise (R/V Knorr KN195-08) in the eastern North Pacific during May 2009";
    String version "2";
    Float64 Westernmost_Easting -140.0003;
    String xml_source "osprey2erddap.update_xml() v1.3";
  }
}

 

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