http://lod.bco-dmo.org/id/dataset/770368
eng; USA
utf8
dataset
Highest level of data collection, from a common set of sensors or instrumentation, usually within the same research project
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
2019-06-10
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
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
2019-08-06
publication
2019-08-06
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2019-08-06
publication
https://doi.org/10.1575/1912/bco-dmo.770368.2
Tristan J. Horner
Woods Hole Oceanographic Institution
principalInvestigator
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
publisher
Cite this dataset as: Horner, T. (2019) 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. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 2) Version Date 2019-08-06 [if applicable, indicate subset used]. doi:10.1575/1912/bco-dmo.770368.2 [access date]
Barium concentration and isotopic data from SAFe, collected during the 2nd GEOTRACES Intercalibration cruise. Dataset Description: Methods and Sampling: <p>Samples were collected on the GEOTRACES carousel, filtered to 0.2 μm or 0.45 μm (depending on filter type), acidified to pH ≈ 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–¹³⁵Ba double spike added. Following spike–sample 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.</p>
<p>Samples were aspirated, desolvated, and analyzed using a 100 μL/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).</p>
<p><strong>Problem report:</strong><br />
Sample 4722 (surface) unclear if sample was filtered, and—if so—what filter cutoff was used.</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1736949 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1736949
completed
Tristan J. Horner
Woods Hole Oceanographic Institution
508-289-3825
266 Woods Hole Rd. Clark 448, MS# 25
Woods Hole
MA
02543
United States
thorner@whoi.edu
pointOfContact
asNeeded
Dataset Version: 2
Unknown
GEOTRC_EVENTNO
lat
long
Filter_type
GEOTRC_SAMPNO
Depth
Ba_D_CONC_BOTTLE
Ba_D_CONC_BOTTLE_stdev
Ba_D_CONC_BOTTLE_FLAG
Ba_138_134_D_DELTA_BOTTLE
Ba_138_134_D_DELTA_BOTTLE_stdev
Ba_138_134_D_DELTA_BOTTLE_FLAG
Notes
GEOTRACES carousel
ThermoFisher Neptune multi-collector ICP-MS
theme
None, User defined
event
latitude
longitude
filter_size
sample identification
depth
Barium
quality flag
comments
featureType
BCO-DMO Standard Parameters
GeoFish Towed near-Surface Sampler
GO-FLO Bottle
Inductively Coupled Plasma Mass Spectrometer
instrument
BCO-DMO Standard Instruments
KN195-08
service
Deployment Activity
eastern North Pacific, North Pacific SAFe Station at 30 deg N 140 deg W, Santa Barbara Basin, 34.25 deg N 120 deg W
place
Locations
otherRestrictions
otherRestrictions
Access Constraints: none. Use Constraints: Please follow guidelines at: http://www.bco-dmo.org/terms-use Distribution liability: Under no circumstances shall BCO-DMO be liable for any direct, incidental, special, consequential, indirect, or punitive damages that result from the use of, or the inability to use, the materials in this data submission. If you are dissatisfied with any materials in this data submission your sole and exclusive remedy is to discontinue use.
U.S. GEOTRACES Pacific Meridional Transect: Tracing Basin-scale Nutrient Cycling and Carbon Export with Dissolved and Particulate Barium-isotopic Distributions
https://osprey.bco-dmo.org/project/770290
U.S. GEOTRACES Pacific Meridional Transect: Tracing Basin-scale Nutrient Cycling and Carbon Export with Dissolved and Particulate Barium-isotopic Distributions
<p><em>NSF Award Abstract:</em><br />
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.</p>
<p>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.</p>
GEOTRACES PMT Barium
largerWorkCitation
project
eng; USA
oceans
eastern North Pacific, North Pacific SAFe Station at 30 deg N 140 deg W, Santa Barbara Basin, 34.25 deg N 120 deg W
-140.0003
-140
30
30.0003
2009-05-18
2009-05-20
0
BCO-DMO catalogue of parameters from 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
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
http://lod.bco-dmo.org/id/dataset-parameter/770415.rdf
Name: GEOTRC_EVENTNO
Units: unitless
Description: <p>The event # from the cruise report</p>
http://lod.bco-dmo.org/id/dataset-parameter/770416.rdf
Name: lat
Units: decimal degrees
Description: <p>Latitude (positive values = North)</p>
http://lod.bco-dmo.org/id/dataset-parameter/770417.rdf
Name: long
Units: decimal degrees
Description: <p>Longitude (negative values = West)</p>
http://lod.bco-dmo.org/id/dataset-parameter/770418.rdf
Name: Filter_type
Units: unitless
Description: <p>Type (and cutoff) of filter used</p>
http://lod.bco-dmo.org/id/dataset-parameter/770419.rdf
Name: GEOTRC_SAMPNO
Units: unitless
Description: <p>Unique GEOTRACES sample ID</p>
http://lod.bco-dmo.org/id/dataset-parameter/770420.rdf
Name: Depth
Units: meters (m)
Description: <p>Sample depth</p>
http://lod.bco-dmo.org/id/dataset-parameter/770421.rdf
Name: Ba_D_CONC_BOTTLE
Units: nanomoles per kilogram (nmol/kg)
Description: <p>Dissolved Ba (barium) concentration</p>
http://lod.bco-dmo.org/id/dataset-parameter/770422.rdf
Name: Ba_D_CONC_BOTTLE_stdev
Units: nmol/kg
Description: <p>One-sigma uncertainty about the barium concentration</p>
http://lod.bco-dmo.org/id/dataset-parameter/770423.rdf
Name: Ba_D_CONC_BOTTLE_FLAG
Units: unitless
Description: <p>ODV quality flag for Ba_D_CONC_BOTTLE</p>
http://lod.bco-dmo.org/id/dataset-parameter/770424.rdf
Name: Ba_138_134_D_DELTA_BOTTLE
Units: per mil deviation rel. to NIST SRM 3104a
Description: <p>Dissolved Ba-isotopic composition</p>
http://lod.bco-dmo.org/id/dataset-parameter/770425.rdf
Name: Ba_138_134_D_DELTA_BOTTLE_stdev
Units: per mil
Description: <p>One-sigma uncertainty about the dissolved Ba-isotopic composition</p>
http://lod.bco-dmo.org/id/dataset-parameter/770426.rdf
Name: Ba_138_134_D_DELTA_BOTTLE_FLAG
Units: unitless
Description: <p>ODV quality flag for Ba_138_134_D_DELTA_BOTTLE</p>
http://lod.bco-dmo.org/id/dataset-parameter/770427.rdf
Name: Notes
Units: unitless
Description: <p>Any issues or concerns</p>
GB/NERC/BODC > British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
2281
https://darchive.mblwhoilibrary.org/bitstream/1912/24430/1/dataset-770368_barium-isotopic-profile-safe__v2.tsv
download
https://doi.org/10.1575/1912/bco-dmo.770368.2
download
onLine
dataset
<p>Samples were collected on the GEOTRACES carousel, filtered to 0.2 μm or 0.45 μm (depending on filter type), acidified to pH ≈ 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–¹³⁵Ba double spike added. Following spike–sample 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.</p>
<p>Samples were aspirated, desolvated, and analyzed using a 100 μL/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).</p>
<p><strong>Problem report:</strong><br />
Sample 4722 (surface) unclear if sample was filtered, and—if so—what filter cutoff was used.</p>
Specified by the Principal Investigator(s)
<p>Data reduction was performed in MATLAB using the baseline-corrected ion beam output from the instrument software. Barium-isotopic compositions were calculated using an iterative, three-dimensional geometric interpretation of the double spike problem, with additional nested loops for interference corrections. All sample compositions are reported as parts per one thousand deviations (i.e., ‰; per mille) relative to NIST SRM 3104a.</p>
<p><strong>Quality Control:&nbsp;</strong>Refer to the Certified Reference Materials (CRMs) <a href="https://datadocs.bco-dmo.org/docs/geotraces/GEOTRACES_PMT/horner/data_docs/NIRVANA_GEOTRACES-std_info.pdf" target="_blank">supplemental file</a> (PDF).</p>
<p><strong>"_FLAG" columns follow the ODV flag scheme, defined as</strong>:<br />
1 =&nbsp;Good Value: Used when replicate samples were analyzed for a particular concentration/isotopic composition.<br />
2 =&nbsp;Probably Good Value: Used when the reported value reflects analysis of a single replicate.<br />
3 =&nbsp;Probably Bad Value: Used when a value appears abnormally high or low (oceanographically inconsistent) based on adjacent depths or typical profile variability and shape using the context of relevant nearby stations.<br />
6 =&nbsp;Value Below Detection Limit: Used when value is below the detection limit for that given element. Empty values are reported rather than zero or a detection limit value.</p>
<p><strong>BCO-DMO Processing:</strong><br />
- modified parameter names (replaced spaces w/ underscores; removed units);<br />
- replaced blanks (no data) with "nd";<br />
- 06 August 2019: replaced version 1 with version 2 of dataset (corrections made in&nbsp;Ba_138_134_D_DELTA_BOTTLE column).</p>
Specified by the Principal Investigator(s)
asNeeded
7.x-1.1
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
PI Supplied Instrument Name: Instrument Name: GeoFish Towed near-Surface Sampler Instrument Short Name:GeoFish Instrument Description: The GeoFish towed sampler is a custom designed near surface (2 meters or less) sampling system for the collection of trace metal clean seawater. It consists of a PVC encapsulated lead weighted torpedo and separate PVC depressor vane supporting the intake utilizing all PFA Teflon tubing connected to a deck mounted, air-driven, PFA Teflon dual-diaphragm pump which provides trace-metal clean seawater at up to 3.7L/min. The GeoFish is towed at up to 13kts off to the side of the vessel outside of the ship's wake to avoid possible contamination from the ship's hull. It was developed by Geoffrey Smith and Ken Bruland (University of California, Santa Cruz). Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/31/
GEOTRACES carousel
GEOTRACES carousel
PI Supplied Instrument Name: GEOTRACES carousel Instrument Name: GO-FLO Bottle Instrument Short Name:GO-FLO Instrument 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. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/30/
ThermoFisher Neptune multi-collector ICP-MS
ThermoFisher Neptune multi-collector ICP-MS
PI Supplied Instrument Name: ThermoFisher Neptune multi-collector ICP-MS Instrument Name: Inductively Coupled Plasma Mass Spectrometer Instrument Short Name:ICP Mass Spec Instrument 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. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB15/
Cruise: KN195-08
KN195-08
R/V Knorr
Community Standard Description
International Council for the Exploration of the Sea
R/V Knorr
vessel
KN195-08
Gregory A. Cutter
Old Dominion University
R/V Knorr
Community Standard Description
International Council for the Exploration of the Sea
R/V Knorr
vessel