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Title Sum-
Institution Dataset ID
     data   graph     files  public 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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The Dataset's Variables and Attributes

Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL access_formats String .htmlTable,.csv,.json,.mat,.nc,.tsv,.esriCsv,.geoJson
attribute NC_GLOBAL acquisition_description String 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.
attribute NC_GLOBAL awards_0_award_nid String 770289
attribute NC_GLOBAL awards_0_award_number String OCE-1736949
attribute NC_GLOBAL awards_0_data_url String http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1736949 (external link)
attribute NC_GLOBAL awards_0_funder_name String NSF Division of Ocean Sciences
attribute NC_GLOBAL awards_0_funding_acronym String NSF OCE
attribute NC_GLOBAL awards_0_funding_source_nid String 355
attribute NC_GLOBAL awards_0_program_manager String Henrietta N Edmonds
attribute NC_GLOBAL awards_0_program_manager_nid String 51517
attribute NC_GLOBAL cdm_data_type String Other
attribute NC_GLOBAL comment String 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
attribute NC_GLOBAL Conventions String COARDS, CF-1.6, ACDD-1.3
attribute NC_GLOBAL creator_email String info at bco-dmo.org
attribute NC_GLOBAL creator_name String BCO-DMO
attribute NC_GLOBAL creator_type String institution
attribute NC_GLOBAL creator_url String https://www.bco-dmo.org/ (external link)
attribute NC_GLOBAL data_source String extract_data_as_tsv version 2.3 19 Dec 2019
attribute NC_GLOBAL date_created String 2019-06-10T16:46:11Z
attribute NC_GLOBAL date_modified String 2019-08-06T17:59:56Z
attribute NC_GLOBAL defaultDataQuery String &time<now
attribute NC_GLOBAL doi String 10.1575/1912/bco-dmo.770368.2
attribute NC_GLOBAL Easternmost_Easting double -140.0
attribute NC_GLOBAL geospatial_lat_max double 30.0003
attribute NC_GLOBAL geospatial_lat_min double 30.0
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double -140.0
attribute NC_GLOBAL geospatial_lon_min double -140.0003
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL geospatial_vertical_max double 4500.0
attribute NC_GLOBAL geospatial_vertical_min double 5.0
attribute NC_GLOBAL geospatial_vertical_positive String down
attribute NC_GLOBAL geospatial_vertical_units String m
attribute NC_GLOBAL infoUrl String https://www.bco-dmo.org/dataset/770368 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL instruments_0_acronym String GO-FLO
attribute NC_GLOBAL instruments_0_dataset_instrument_nid String 770400
attribute NC_GLOBAL instruments_0_description String 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.
attribute NC_GLOBAL instruments_0_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L05/current/30/ (external link)
attribute NC_GLOBAL instruments_0_instrument_name String GO-FLO Bottle
attribute NC_GLOBAL instruments_0_instrument_nid String 411
attribute NC_GLOBAL instruments_0_supplied_name String GEOTRACES carousel
attribute NC_GLOBAL instruments_1_acronym String ICP Mass Spec
attribute NC_GLOBAL instruments_1_dataset_instrument_nid String 770402
attribute NC_GLOBAL instruments_1_description String An ICP Mass Spec is an instrument that passes nebulized samples into an inductively-coupled gas plasma (8-10000 K) where they are atomized and ionized. Ions of specific mass-to-charge ratios are quantified in a quadrupole mass spectrometer.
attribute NC_GLOBAL instruments_1_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L05/current/LAB15/ (external link)
attribute NC_GLOBAL instruments_1_instrument_name String Inductively Coupled Plasma Mass Spectrometer
attribute NC_GLOBAL instruments_1_instrument_nid String 530
attribute NC_GLOBAL instruments_1_supplied_name String ThermoFisher Neptune multi-collector ICP-MS
attribute NC_GLOBAL instruments_2_acronym String GeoFish
attribute NC_GLOBAL instruments_2_dataset_instrument_nid String 770401
attribute NC_GLOBAL instruments_2_description String The GeoFish towed sampler is a custom designed near surface (
attribute NC_GLOBAL instruments_2_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L05/current/31/ (external link)
attribute NC_GLOBAL instruments_2_instrument_name String GeoFish Towed near-Surface Sampler
attribute NC_GLOBAL instruments_2_instrument_nid String 549
attribute NC_GLOBAL keywords String 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
attribute NC_GLOBAL license String https://www.bco-dmo.org/dataset/770368/license (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/770368 (external link)
attribute NC_GLOBAL Northernmost_Northing double 30.0003
attribute NC_GLOBAL param_mapping String {'770368': {'lat': 'flag - latitude', 'Depth': 'flag - depth', 'long': 'flag - longitude'}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/770368/parameters (external link)
attribute NC_GLOBAL people_0_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_0_affiliation_acronym String WHOI
attribute NC_GLOBAL people_0_person_name String Tristan J. Horner
attribute NC_GLOBAL people_0_person_nid String 680928
attribute NC_GLOBAL people_0_role String Principal Investigator
attribute NC_GLOBAL people_0_role_type String originator
attribute NC_GLOBAL people_1_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_1_affiliation_acronym String WHOI BCO-DMO
attribute NC_GLOBAL people_1_person_name String Shannon Rauch
attribute NC_GLOBAL people_1_person_nid String 51498
attribute NC_GLOBAL people_1_role String BCO-DMO Data Manager
attribute NC_GLOBAL people_1_role_type String related
attribute NC_GLOBAL project String GEOTRACES PMT Barium
attribute NC_GLOBAL projects_0_acronym String GEOTRACES PMT Barium
attribute NC_GLOBAL projects_0_description String 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.
attribute NC_GLOBAL projects_0_end_date String 2020-12
attribute NC_GLOBAL projects_0_name String U.S. GEOTRACES Pacific Meridional Transect: Tracing Basin-scale Nutrient Cycling and Carbon Export with Dissolved and Particulate Barium-isotopic Distributions
attribute NC_GLOBAL projects_0_project_nid String 770290
attribute NC_GLOBAL projects_0_start_date String 2018-01
attribute NC_GLOBAL publisher_name String Biological and Chemical Oceanographic Data Management Office (BCO-DMO)
attribute NC_GLOBAL publisher_type String institution
attribute NC_GLOBAL sourceUrl String (local files)
attribute NC_GLOBAL Southernmost_Northing double 30.0
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v55
attribute NC_GLOBAL summary String 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.
attribute NC_GLOBAL title String 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
attribute NC_GLOBAL version String 2
attribute NC_GLOBAL Westernmost_Easting double -140.0003
attribute NC_GLOBAL xml_source String osprey2erddap.update_xml() v1.3
variable GEOTRC_EVENTNO   short  
attribute GEOTRC_EVENTNO _FillValue short 32767
attribute GEOTRC_EVENTNO actual_range short 2075, 2085
attribute GEOTRC_EVENTNO bcodmo_name String event
attribute GEOTRC_EVENTNO description String The event # from the cruise report
attribute GEOTRC_EVENTNO long_name String GEOTRC EVENTNO
attribute GEOTRC_EVENTNO nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/EVTAGFL/ (external link)
attribute GEOTRC_EVENTNO units String unitless
variable latitude   double  
attribute latitude _CoordinateAxisType String Lat
attribute latitude _FillValue double NaN
attribute latitude actual_range double 30.0, 30.0003
attribute latitude axis String Y
attribute latitude bcodmo_name String latitude
attribute latitude colorBarMaximum double 90.0
attribute latitude colorBarMinimum double -90.0
attribute latitude description String Latitude (positive values = North)
attribute latitude ioos_category String Location
attribute latitude long_name String Latitude
attribute latitude nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/LATX/ (external link)
attribute latitude standard_name String latitude
attribute latitude units String degrees_north
variable longitude   double  
attribute longitude _CoordinateAxisType String Lon
attribute longitude _FillValue double NaN
attribute longitude actual_range double -140.0003, -140.0
attribute longitude axis String X
attribute longitude bcodmo_name String longitude
attribute longitude colorBarMaximum double 180.0
attribute longitude colorBarMinimum double -180.0
attribute longitude description String Longitude (negative values = West)
attribute longitude ioos_category String Location
attribute longitude long_name String Longitude
attribute longitude nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/LONX/ (external link)
attribute longitude source_name String long
attribute longitude standard_name String longitude
attribute longitude units String degrees_east
variable Filter_type   String  
attribute Filter_type bcodmo_name String filter_size
attribute Filter_type description String Type (and cutoff) of filter used
attribute Filter_type long_name String Filter Type
attribute Filter_type units String unitless
variable GEOTRC_SAMPNO   short  
attribute GEOTRC_SAMPNO _FillValue short 32767
attribute GEOTRC_SAMPNO actual_range short 4601, 4791
attribute GEOTRC_SAMPNO bcodmo_name String sample
attribute GEOTRC_SAMPNO description String Unique GEOTRACES sample ID
attribute GEOTRC_SAMPNO long_name String GEOTRC SAMPNO
attribute GEOTRC_SAMPNO nerc_identifier String https://vocab.nerc.ac.uk/collection/P02/current/ACYC/ (external link)
attribute GEOTRC_SAMPNO units String unitless
variable depth   double  
attribute depth _CoordinateAxisType String Height
attribute depth _CoordinateZisPositive String down
attribute depth _FillValue double NaN
attribute depth actual_range double 5.0, 4500.0
attribute depth axis String Z
attribute depth bcodmo_name String depth
attribute depth colorBarMaximum double 8000.0
attribute depth colorBarMinimum double -8000.0
attribute depth colorBarPalette String TopographyDepth
attribute depth description String Sample depth
attribute depth ioos_category String Location
attribute depth long_name String Depth
attribute depth nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/DEPH/ (external link)
attribute depth positive String down
attribute depth standard_name String depth
attribute depth units String m
variable Ba_D_CONC_BOTTLE   float  
attribute Ba_D_CONC_BOTTLE _FillValue float NaN
attribute Ba_D_CONC_BOTTLE actual_range float 34.96, 158.24
attribute Ba_D_CONC_BOTTLE bcodmo_name String Ba
attribute Ba_D_CONC_BOTTLE description String Dissolved Ba (barium) concentration
attribute Ba_D_CONC_BOTTLE long_name String Ba D CONC BOTTLE
attribute Ba_D_CONC_BOTTLE units String nanomoles per kilogram (nmol/kg)
variable Ba_D_CONC_BOTTLE_stdev   float  
attribute Ba_D_CONC_BOTTLE_stdev _FillValue float NaN
attribute Ba_D_CONC_BOTTLE_stdev actual_range float 0.44, 1.98
attribute Ba_D_CONC_BOTTLE_stdev bcodmo_name String Ba
attribute Ba_D_CONC_BOTTLE_stdev description String One-sigma uncertainty about the barium concentration
attribute Ba_D_CONC_BOTTLE_stdev long_name String Ba D CONC BOTTLE Stdev
attribute Ba_D_CONC_BOTTLE_stdev units String nmol/kg
variable Ba_D_CONC_BOTTLE_FLAG   byte  
attribute Ba_D_CONC_BOTTLE_FLAG _FillValue byte 127
attribute Ba_D_CONC_BOTTLE_FLAG actual_range byte 1, 2
attribute Ba_D_CONC_BOTTLE_FLAG bcodmo_name String q_flag
attribute Ba_D_CONC_BOTTLE_FLAG colorBarMaximum double 150.0
attribute Ba_D_CONC_BOTTLE_FLAG colorBarMinimum double 0.0
attribute Ba_D_CONC_BOTTLE_FLAG description String ODV quality flag for Ba_D_CONC_BOTTLE
attribute Ba_D_CONC_BOTTLE_FLAG long_name String Ba D CONC BOTTLE FLAG
attribute Ba_D_CONC_BOTTLE_FLAG units String unitless
variable Ba_138_134_D_DELTA_BOTTLE   float  
attribute Ba_138_134_D_DELTA_BOTTLE _FillValue float NaN
attribute Ba_138_134_D_DELTA_BOTTLE actual_range float 0.216, 0.617
attribute Ba_138_134_D_DELTA_BOTTLE bcodmo_name String Ba
attribute Ba_138_134_D_DELTA_BOTTLE description String Dissolved Ba-isotopic composition
attribute Ba_138_134_D_DELTA_BOTTLE long_name String Ba 138 134 D DELTA BOTTLE
attribute Ba_138_134_D_DELTA_BOTTLE units String per mil deviation rel. to NIST SRM 3104a
variable Ba_138_134_D_DELTA_BOTTLE_stdev   float  
attribute Ba_138_134_D_DELTA_BOTTLE_stdev _FillValue float NaN
attribute Ba_138_134_D_DELTA_BOTTLE_stdev actual_range float 0.015, 0.022
attribute Ba_138_134_D_DELTA_BOTTLE_stdev bcodmo_name String Ba
attribute Ba_138_134_D_DELTA_BOTTLE_stdev description String One-sigma uncertainty about the dissolved Ba-isotopic composition
attribute Ba_138_134_D_DELTA_BOTTLE_stdev long_name String Ba 138 134 D DELTA BOTTLE Stdev
attribute Ba_138_134_D_DELTA_BOTTLE_stdev units String per mil
variable Ba_138_134_D_DELTA_BOTTLE_FLAG   byte  
attribute Ba_138_134_D_DELTA_BOTTLE_FLAG _FillValue byte 127
attribute Ba_138_134_D_DELTA_BOTTLE_FLAG actual_range byte 1, 2
attribute Ba_138_134_D_DELTA_BOTTLE_FLAG bcodmo_name String q_flag
attribute Ba_138_134_D_DELTA_BOTTLE_FLAG colorBarMaximum double 150.0
attribute Ba_138_134_D_DELTA_BOTTLE_FLAG colorBarMinimum double 0.0
attribute Ba_138_134_D_DELTA_BOTTLE_FLAG description String ODV quality flag for Ba_138_134_D_DELTA_BOTTLE
attribute Ba_138_134_D_DELTA_BOTTLE_FLAG long_name String Ba 138 134 D DELTA BOTTLE FLAG
attribute Ba_138_134_D_DELTA_BOTTLE_FLAG units String unitless
variable Notes   String  
attribute Notes bcodmo_name String comment
attribute Notes description String Any issues or concerns
attribute Notes long_name String Notes
attribute Notes units String unitless

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.

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