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Title Sum-
Institution Dataset ID
   set  data   graph     files  public Barium concentration and isotopic data collected along the California Coastline during July
2014 from R/V Melville cruise MV1405
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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 using GO-FLO Teflon Trace Metal Bottles, 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 136Ba\u2013135Ba 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 from 1,000 m (Event #42; St. 12b) has an asymmetric uncertainty due
to possible evaporative losses;\u00a0positive uncertainty is +1.4 nmol/kg,
whereas negative uncertainty is \u22126.3 nmol/kg (both are one standard
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
collected along the California Coastline in 2014 (MV1405)
PI: Tristan Horner (WHOI)
Version date: 10 June 2019
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 2019-06-10T20:16:48Z
attribute NC_GLOBAL date_modified String 2019-08-06T17:59:42Z
attribute NC_GLOBAL defaultDataQuery String &time<now
attribute NC_GLOBAL doi String 10.1575/1912/bco-dmo.770447.1
attribute NC_GLOBAL Easternmost_Easting double -125.746
attribute NC_GLOBAL geospatial_lat_max double 39.001
attribute NC_GLOBAL geospatial_lat_min double 38.99
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double -125.746
attribute NC_GLOBAL geospatial_lon_min double -125.75
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL geospatial_vertical_max double 1500.0
attribute NC_GLOBAL geospatial_vertical_min double 15.0
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/770447 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL instruments_0_acronym String ICP Mass Spec
attribute NC_GLOBAL instruments_0_dataset_instrument_nid String 770531
attribute NC_GLOBAL instruments_0_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_0_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L05/current/LAB15/ (external link)
attribute NC_GLOBAL instruments_0_instrument_name String Inductively Coupled Plasma Mass Spectrometer
attribute NC_GLOBAL instruments_0_instrument_nid String 530
attribute NC_GLOBAL instruments_0_supplied_name String ThermoFisher Neptune multi-collector ICP-MS
attribute NC_GLOBAL instruments_1_acronym String GO-FLO Teflon TM
attribute NC_GLOBAL instruments_1_dataset_instrument_nid String 770532
attribute NC_GLOBAL instruments_1_description String GO-FLO Teflon-lined Trace Metal free sampling bottles are used for collecting water samples for trace metal, nutrient and pigment analysis. The GO-FLO sampling bottle is designed specifically 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_1_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L05/current/30/ (external link)
attribute NC_GLOBAL instruments_1_instrument_name String GO-FLO Teflon Trace Metal Bottle
attribute NC_GLOBAL instruments_1_instrument_nid String 533
attribute NC_GLOBAL instruments_1_supplied_name String GO-FLO Teflon Trace Metal Bottle
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, bottle_rosette, chemical, conc, data, dataset, delta, depth, deviation, dmo, erddap, event, flag, latitude, longitude, management, notes, oceanography, office, preliminary, rosette, standard, standard deviation, station, stdev
attribute NC_GLOBAL license String https://www.bco-dmo.org/dataset/770447/license (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/770447 (external link)
attribute NC_GLOBAL Northernmost_Northing double 39.001
attribute NC_GLOBAL param_mapping String {'770447': {'lat': 'flag - latitude', 'Depth': 'flag - depth', 'long': 'flag - longitude'}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/770447/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 38.99
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v55
attribute NC_GLOBAL subsetVariables String Ba_138_134_D_DELTA_BOTTLE_FLAG
attribute NC_GLOBAL summary String Barium concentration and isotopic data collected along the California Coastline during July 2014 from R/V Melville cruise MV1405.
attribute NC_GLOBAL title String Barium concentration and isotopic data collected along the California Coastline during July 2014 from R/V Melville cruise MV1405
attribute NC_GLOBAL version String 1
attribute NC_GLOBAL Westernmost_Easting double -125.75
attribute NC_GLOBAL xml_source String osprey2erddap.update_xml() v1.3
variable Event   byte  
attribute Event _FillValue byte 127
attribute Event actual_range byte 31, 42
attribute Event bcodmo_name String event
attribute Event description String Event number
attribute Event long_name String Event
attribute Event nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/EVTAGFL/ (external link)
attribute Event units String unitless
variable Station   String  
attribute Station bcodmo_name String station
attribute Station description String Station number
attribute Station long_name String Station
attribute Station units String unitless
variable latitude   double  
attribute latitude _CoordinateAxisType String Lat
attribute latitude _FillValue double NaN
attribute latitude actual_range double 38.99, 39.001
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 -125.75, -125.746
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 depth   double  
attribute depth _CoordinateAxisType String Height
attribute depth _CoordinateZisPositive String down
attribute depth _FillValue double NaN
attribute depth actual_range double 15.0, 1500.0
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 bottle_rosette   byte  
attribute bottle_rosette _FillValue byte 127
attribute bottle_rosette actual_range byte 1, 17
attribute bottle_rosette bcodmo_name String bottle
attribute bottle_rosette description String Bottle number from rosette
attribute bottle_rosette long_name String Bottle Rosette
attribute bottle_rosette units String unitless
variable Ba_D_CONC_BOTTLE   float  
attribute Ba_D_CONC_BOTTLE _FillValue float NaN
attribute Ba_D_CONC_BOTTLE actual_range float 39.89, 127.22
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 0.5, 1.59
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 2, 3
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 0.297, 0.571
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, 0.035
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 2, 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 concerns or issues
attribute Notes long_name String Notes
attribute Notes units String unitless

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