http://lod.bco-dmo.org/id/dataset/831323
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
2020-11-24
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Dissolved cobalt, nutrients, and hydrography from the Pacific ProteOMZ Expedition, FK160115, on R/V Falkor in 2016
2020-11-25
publication
2020-11-25
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2020-11-25
publication
https://doi.org/10.26008/1912/bco-dmo.831323.1
Mak A. Saito
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: Saito, M. A. (2020) Dissolved cobalt, nutrients, and hydrography from the Pacific ProteOMZ Expedition, FK160115, on R/V Falkor in 2016. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2020-11-25 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.831323.1 [access date]
Dissolved cobalt, nutrients, and hydrography from the Pacific ProteOMZ FK160115 Expedition in 2016 Dataset Description: Methods and Sampling: <p>Dissolved seawater samples were collected on the ProteOMZ FK150116 expedition (Jan-Feb 2016) using a 12-bottle trace metal clean rosette equipped with 8 L X-Niskin bottles (Ocean Test Equipment), a titanium frame, and a Kevlar cable, as described in (Cutter and Bruland 2012). Seawater from the Go-Flo bottles was subsampled in a trace metal clean plastic "bubble" equipped with HEPA filters providing positive air pressure. Dissolved Co subsamples were filtered using a 142 mm polycarbonate plastic sandwich filter (Geotech Environmental Equipment) equipped with a 0.2 um Supor membrane filter (Pall Corporation) and stored until analysis in the laboratory in a 60 mL LDPE bottle (Nalgene) that had been soaked for ~1 week in Citranox, an acidic detergent, rinsed with Milli-Q water (Millipore), soaked for ~2 weeks in 10% trace metal grade HCl (Optima), and rinsed with lightly acidic Milli-Q water (&lt;0.1% HCl). To preserve the samples for future analysis after the cruise, all samples were filled entirely with no remaining headspace, stored with one oxygen-absorbing satchel (Mitsubishi Gas Chemical, model RP-3K) per 60 mL water sample, heat-sealed in plastic bags, and stored at 4⁰C.</p>
<p>Dissolved cobalt (dCo) samples were analyzed in Nov-Dec 2017 by cathodic stripping voltammetry (CSV) as originally described by (Saito and Moffett 2001) and modified by (Saito et al. 2010; Hawco et al. 2016). One portion of the samples (stations 1-10) were analyzed in the Saito laboratory in Woods Hole, MA, and the remaining samples (stations 11-14) were analyzed at sea on the CICLOPS NBP-1801 cruise in the trace metal plastic "bubble". This was done so that all of the samples could be run together using the same batch of DMG and EPPS reagents.</p>
<p>Dissolved Co was measured using a Metrohm 663 VA and uAutolabIII system equipped with a hanging mercury drop working electrode. All reagents were run through treated Chelex-100 resin columns (BioRad) to remove trace metal contaminates, except DMG which was purified by recrystallization. The Chelex was resin prepared as described in (Price et al. 1988/89) and reagents were purified as described in Saito et al., 2002. 0.2 um filtered water samples were UV-irradiated in acid-washed quartz tubes for one hour using a water-cooled UV irradiation system (Metrohm 705 UV Digestor) to destroy natural ligand-bound Co complexes. Then, 11 mL of sample seawater was aliquoted into 15 mL acid-washed polypropylene vials, and 100 uL of 0.1 M dimethyglyoxime (DMG, Sigma Aldrich) and 130 uL of 0.5 M N-(2-hydroxyethyl)piperazine-N-(3-propanesulfonic acid) (EPPS, Sigma Aldrich) buffer was added. The samples were then processed on an autosampler (Metrohm 858 Sample Processor), which added 8.5 mL of the sample solution and 1.5 mL of a 1.5 M NaNO₂ reagent (Merck) to a Teflon cup for electrochemical analysis. The mercury electrode performed a fast linear sweep from -1.4 V to -0.6 V at a rate of 5 V s⁻¹, which reduced the Co bound in the Co(DMG)₂ complex from Co(II) to Co(0) and produced a Co reduction peak at -1.15 V (Saito and Moffett 2001) with a height linearly proportional to the amount of dCo present in the sample. A standard addition curve was generated for each sample analyzed with 4 automated additions of a 25 pM CoCl₂ (Fisher Scientific) standard made fresh in for this sample batch.</p>
Funding provided by Gordon and Betty Moore Foundation: Marine Microbiology Initiative (MMI) Award Number: GBMF3782 Award URL: https://www.moore.org/grant-detail?grantId=GBMF3782
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1736599 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1736599
completed
Mak A. Saito
Woods Hole Oceanographic Institution
508-289-2393
266 Woods Hole Rd. MS #51 Watson Lab
Woods Hole
MA
02543
USA
msaito@whoi.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
Station_ID
Start_Date_UTC
Start_Time_UTC
Start_ISO_DateTime_UTC
End_Date_UTC
End_Time_UTC
End_ISO_DateTime_UTC
Start_Latitude
Start_Longitude
End_Latitude
End_Longitude
Event_ID
Sample_ID
Sample_Depth
Co_D_CONC_BOTTLE_cc9oxz
SD1_Co_D_CONC_BOTTLE_cc9oxz
Flag_Co_D_CONC_BOTTLE_cc9oxz
PHOSPHATE_D_CONC_BOTTLE_fxqtpr
SD1_PHOSPHATE_D_CONC_BOTTLE_fxqtpr
Flag_PHOSPHATE_D_CONC_BOTTLE_fxqtpr
NO2_NO3_D_CONC_BOTTLE_h3f4lh
SD1_NO2_NO3_D_CONC_BOTTLE_h3f4lh
Flag_NO2_NO3_D_CONC_BOTTLE_h3f4lh
SILICATE_D_CONC_BOTTLE_jdlfin
SD1_SILICATE_D_CONC_BOTTLE_jdlfin
Flag_SILICATE_D_CONC_BOTTLE_jdlfin
NITRITE_D_CONC_BOTTLE_h9224x
SD1_NITRITE_D_CONC_BOTTLE_h9224x
Flag_NITRITE_D_CONC_BOTTLE_h9224x
NH4_D_CONC_BOTTLE_enhcwu
SD1_NH4_D_CONC_BOTTLE_enhcwu
Flag_NH4_D_CONC_BOTTLE_enhcwu
NITRATE_D_CONC_BOTTLE_wmeegn
SD1_NITRATE_D_CONC_BOTTLE_wmeegn
Flag_NITRATE_D_CONC_BOTTLE_wmeegn
CTDTMP_zcmqyu
SD1_CTDTMP_zcmqyu
Flag_CTDTMP_zcmqyu
CTDSAL_po5mds
SD1_CTDSAL_po5mds
Flag_CTDSAL_po5mds
CTDOXY_rfrw1n
SD1_CTDOXY_rfrw1n
Flag_CTDOXY_rfrw1n
Metrohm 858 Sample Processor
Metrohm 663 VA and µAutolabIII system
8 L X-Niskin bottles (Ocean Test Equipment)
Metrohm 705 UV Digestor
theme
None, User defined
station
date
time of day
ISO_DateTime_UTC
latitude
longitude
event
sample identification
depth
Cobalt
quality flag
phosphate
nitrate plus nitrite
Silicate, Si(OH)4, silicic acid
Nitrite
Ammonium
Nitrate
water temperature at measurement depth
salinity
dissolved Oxygen
featureType
BCO-DMO Standard Parameters
Laboratory Autosampler
Metrohm 663 VA Stand mercury electrode
Niskin bottle
UV Digester
instrument
BCO-DMO Standard Instruments
FK160115
service
Deployment Activity
Central Pacific
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.
The ProteOMZ Expedition: Investigating Life Without Oxygen in the Pacific Ocean
https://schmidtocean.org/cruise/investigating-life-without-oxygen-in-the-tropical-pacific/#team
The ProteOMZ Expedition: Investigating Life Without Oxygen in the Pacific Ocean
<p>From Schmidt Ocean Institute's ProteOMZ Project page:</p>
<p>Rising temperatures, ocean acidification, and overfishing have now gained widespread notoriety as human-caused phenomena that are changing our seas. In recent years, scientists have increasingly recognized that there is yet another ingredient in that deleterious mix: a process called deoxygenation that results in less oxygen available in our seas.</p>
<p>Large-scale ocean circulation naturally results in low-oxygen areas of the ocean called oxygen deficient zones (ODZs). The cycling of carbon and nutrients – the foundation of marine life, called biogeochemistry – is fundamentally different in ODZs than in oxygen-rich areas. Because researchers think deoxygenation will greatly expand the total area of ODZs over the next 100 years, studying how these areas function now is important in predicting and understanding the oceans of the future. This first expedition of 2016 led by Dr. Mak Saito from the Woods Hole Oceanographic Institution (WHOI) along with scientists from University of Maryland Center for Environmental Science, University of California Santa Cruz, and University of Washington aimed to do just that, investigate ODZs.</p>
<p>During the 28 day voyage named “ProteOMZ,” researchers aboard R/V <em>Falkor </em>traveled from Honolulu, Hawaii to Tahiti to describe the biogeochemical processes that occur within this particular swath of the ocean’s ODZs. By doing so, they contributed to our greater understanding of ODZs, gathered a database of baseline measurements to which future measurements can be compared, and established a new methodology that could be used in future research on these expanding ODZs.</p>
ProteOMZ (Proteomics in an Oxygen Minimum Zone)
largerWorkCitation
project
eng; USA
oceans
Central Pacific
-156
-139.8
-10.563
17
2016-01-18
2016-02-04
Central Pacific Ocean (Hawaii to Tahiti)
0
BCO-DMO catalogue of parameters from Dissolved cobalt, nutrients, and hydrography from the Pacific ProteOMZ Expedition, FK160115, on R/V Falkor in 2016
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/831394.rdf
Name: Station_ID
Units: unitless
Description: <p>Station ID number</p>
http://lod.bco-dmo.org/id/dataset-parameter/831395.rdf
Name: Start_Date_UTC
Units: unitless
Description: <p>Date at start of sample collection; format: DD/MM/YYYY</p>
http://lod.bco-dmo.org/id/dataset-parameter/831396.rdf
Name: Start_Time_UTC
Units: unitless
Description: <p>Time (UTC) at start of sample collection; format: hh:mm</p>
http://lod.bco-dmo.org/id/dataset-parameter/831397.rdf
Name: Start_ISO_DateTime_UTC
Units: unitless
Description: <p>Date and time (UTC) at start of sample collection formatted to ISO8601 standard: YYYY-MM-DDThh:mmZ</p>
http://lod.bco-dmo.org/id/dataset-parameter/831398.rdf
Name: End_Date_UTC
Units: unitless
Description: <p>Date at end of sample collection; format: DD/MM/YYYY</p>
http://lod.bco-dmo.org/id/dataset-parameter/831399.rdf
Name: End_Time_UTC
Units: unitless
Description: <p>Time (UTC) at end of sample collection; format: hh:mm</p>
http://lod.bco-dmo.org/id/dataset-parameter/831400.rdf
Name: End_ISO_DateTime_UTC
Units: unitless
Description: <p>Date and time (UTC) at end of sample collection formatted to ISO8601 standard: YYYY-MM-DDThh:mmZ</p>
http://lod.bco-dmo.org/id/dataset-parameter/831401.rdf
Name: Start_Latitude
Units: degrees North
Description: <p>Latitude at start of sample collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/831402.rdf
Name: Start_Longitude
Units: degrees East
Description: <p>Longitude at start of sample collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/831403.rdf
Name: End_Latitude
Units: degrees North
Description: <p>Latitude at end of sample collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/831404.rdf
Name: End_Longitude
Units: degrees East
Description: <p>Longitude at end of sample collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/831405.rdf
Name: Event_ID
Units: unitless
Description: <p>Event ID number</p>
http://lod.bco-dmo.org/id/dataset-parameter/831406.rdf
Name: Sample_ID
Units: unitless
Description: <p>Sample ID number</p>
http://lod.bco-dmo.org/id/dataset-parameter/831407.rdf
Name: Sample_Depth
Units: meters (m)
Description: <p>Sample depth</p>
http://lod.bco-dmo.org/id/dataset-parameter/831408.rdf
Name: Co_D_CONC_BOTTLE_cc9oxz
Units: picomolar (pM)
Description: <p>Concentration of dissolved Co (after UV oxidation) from Niskin bottle</p>
http://lod.bco-dmo.org/id/dataset-parameter/831409.rdf
Name: SD1_Co_D_CONC_BOTTLE_cc9oxz
Units: picomolar (pM)
Description: <p>One standard deviation of Co_D_CONC_BOTTLE_cc9oxz</p>
http://lod.bco-dmo.org/id/dataset-parameter/831410.rdf
Name: Flag_Co_D_CONC_BOTTLE_cc9oxz
Units: unitless
Description: <p>Quality flag for Co_D_CONC_BOTTLE_cc9oxz</p>
http://lod.bco-dmo.org/id/dataset-parameter/831411.rdf
Name: PHOSPHATE_D_CONC_BOTTLE_fxqtpr
Units: micromoles per kilogram (umol/kg)
Description: <p>Concentration of dissolved phosphate, samples may or may not have been filtered</p>
http://lod.bco-dmo.org/id/dataset-parameter/831412.rdf
Name: SD1_PHOSPHATE_D_CONC_BOTTLE_fxqtpr
Units: micromoles per kilogram (umol/kg)
Description: <p>One standard deviation of PHOSPHATE_D_CONC_BOTTLE_fxqtpr</p>
http://lod.bco-dmo.org/id/dataset-parameter/831413.rdf
Name: Flag_PHOSPHATE_D_CONC_BOTTLE_fxqtpr
Units: unitless
Description: <p>Quality flag for PHOSPHATE_D_CONC_BOTTLE_fxqtpr</p>
http://lod.bco-dmo.org/id/dataset-parameter/831414.rdf
Name: NO2_NO3_D_CONC_BOTTLE_h3f4lh
Units: micromoles per kilogram (umol/kg)
Description: <p>Concentration of dissolved NITRITE plus NITRATE, samples may or may not have been filtered</p>
http://lod.bco-dmo.org/id/dataset-parameter/831415.rdf
Name: SD1_NO2_NO3_D_CONC_BOTTLE_h3f4lh
Units: micromoles per kilogram (umol/kg)
Description: <p>One standard deviation of NO2_NO3_D_CONC_BOTTLE_h3f4lh</p>
http://lod.bco-dmo.org/id/dataset-parameter/831416.rdf
Name: Flag_NO2_NO3_D_CONC_BOTTLE_h3f4lh
Units: unitless
Description: <p>Quality flag for NO2_NO3_D_CONC_BOTTLE_h3f4lh</p>
http://lod.bco-dmo.org/id/dataset-parameter/831417.rdf
Name: SILICATE_D_CONC_BOTTLE_jdlfin
Units: micromoles per kilogram (umol/kg)
Description: <p>Concentration of dissolved silicate, samples may or may not have been filtered</p>
http://lod.bco-dmo.org/id/dataset-parameter/831418.rdf
Name: SD1_SILICATE_D_CONC_BOTTLE_jdlfin
Units: micromoles per kilogram (umol/kg)
Description: <p>One standard deviation of SILICATE_D_CONC_BOTTLE_jdlfin</p>
http://lod.bco-dmo.org/id/dataset-parameter/831419.rdf
Name: Flag_SILICATE_D_CONC_BOTTLE_jdlfin
Units: unitless
Description: <p>Quality flag for SILICATE_D_CONC_BOTTLE_jdlfin</p>
http://lod.bco-dmo.org/id/dataset-parameter/831420.rdf
Name: NITRITE_D_CONC_BOTTLE_h9224x
Units: micromoles per kilogram (umol/kg)
Description: <p>Concentration of dissolved NITRITE, samples may or may not have been filtered</p>
http://lod.bco-dmo.org/id/dataset-parameter/831421.rdf
Name: SD1_NITRITE_D_CONC_BOTTLE_h9224x
Units: micromoles per kilogram (umol/kg)
Description: <p>One standard deviation of NITRITE_D_CONC_BOTTLE_h9224x</p>
http://lod.bco-dmo.org/id/dataset-parameter/831422.rdf
Name: Flag_NITRITE_D_CONC_BOTTLE_h9224x
Units: unitless
Description: <p>Quality flag for NITRITE_D_CONC_BOTTLE_h9224x</p>
http://lod.bco-dmo.org/id/dataset-parameter/831423.rdf
Name: NH4_D_CONC_BOTTLE_enhcwu
Units: micromoles per kilogram (umol/kg)
Description: <p>Concentration of dissolved ammonium, samples may or may not have been filtered</p>
http://lod.bco-dmo.org/id/dataset-parameter/831424.rdf
Name: SD1_NH4_D_CONC_BOTTLE_enhcwu
Units: micromoles per kilogram (umol/kg)
Description: <p>One standard deviation of NH4_D_CONC_BOTTLE_enhcwu</p>
http://lod.bco-dmo.org/id/dataset-parameter/831425.rdf
Name: Flag_NH4_D_CONC_BOTTLE_enhcwu
Units: unitless
Description: <p>Quality flag for NH4_D_CONC_BOTTLE_enhcwu</p>
http://lod.bco-dmo.org/id/dataset-parameter/831426.rdf
Name: NITRATE_D_CONC_BOTTLE_wmeegn
Units: micromoles per kilogram (umol/kg)
Description: <p>Concentration of dissolved NITRATE, samples may or may not have been filtered</p>
http://lod.bco-dmo.org/id/dataset-parameter/831427.rdf
Name: SD1_NITRATE_D_CONC_BOTTLE_wmeegn
Units: micromoles per kilogram (umol/kg)
Description: <p>One standard deviation of NITRATE_D_CONC_BOTTLE_wmeegn</p>
http://lod.bco-dmo.org/id/dataset-parameter/831428.rdf
Name: Flag_NITRATE_D_CONC_BOTTLE_wmeegn
Units: unitless
Description: <p>Quality flag for NITRATE_D_CONC_BOTTLE_wmeegn</p>
http://lod.bco-dmo.org/id/dataset-parameter/831429.rdf
Name: CTDTMP_zcmqyu
Units: degrees Celsius
Description: <p>Temperature from CTD sensor in the ITS-90 convention</p>
http://lod.bco-dmo.org/id/dataset-parameter/831430.rdf
Name: SD1_CTDTMP_zcmqyu
Units: degrees Celsius
Description: <p>One standard deviation of CTDTMP_zcmqyu</p>
http://lod.bco-dmo.org/id/dataset-parameter/831431.rdf
Name: Flag_CTDTMP_zcmqyu
Units: unitless
Description: <p>Quality flag for CTDTMP_zcmqyu</p>
http://lod.bco-dmo.org/id/dataset-parameter/831432.rdf
Name: CTDSAL_po5mds
Units: unitless
Description: <p>Practical salinity from CTD sensor on the PSS-1978 scale</p>
http://lod.bco-dmo.org/id/dataset-parameter/831433.rdf
Name: SD1_CTDSAL_po5mds
Units: unitless
Description: <p>One standard deviation of CTDSAL_po5mds</p>
http://lod.bco-dmo.org/id/dataset-parameter/831434.rdf
Name: Flag_CTDSAL_po5mds
Units: unitless
Description: <p>Quality flag for CTDSAL_po5mds</p>
http://lod.bco-dmo.org/id/dataset-parameter/831435.rdf
Name: CTDOXY_rfrw1n
Units: micromoles per kilogram (umol/kg)
Description: <p>Concentration of dissolved oxygen from sensor on CTD</p>
http://lod.bco-dmo.org/id/dataset-parameter/831436.rdf
Name: SD1_CTDOXY_rfrw1n
Units: micromoles per kilogram (umol/kg)
Description: <p>One standard deviation of CTDOXY_rfrw1n</p>
http://lod.bco-dmo.org/id/dataset-parameter/831437.rdf
Name: Flag_CTDOXY_rfrw1n
Units: unitless
Description: <p>Quality flag for CTDOXY_rfrw1n</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
35349
https://darchive.mblwhoilibrary.org/bitstream/1912/26404/1/dataset-831323_fk160115-dissolved-cobalt__v1.tsv
download
https://doi.org/10.26008/1912/bco-dmo.831323.1
download
onLine
dataset
<p>Dissolved seawater samples were collected on the ProteOMZ FK150116 expedition (Jan-Feb 2016) using a 12-bottle trace metal clean rosette equipped with 8 L X-Niskin bottles (Ocean Test Equipment), a titanium frame, and a Kevlar cable, as described in (Cutter and Bruland 2012). Seawater from the Go-Flo bottles was subsampled in a trace metal clean plastic "bubble" equipped with HEPA filters providing positive air pressure. Dissolved Co subsamples were filtered using a 142 mm polycarbonate plastic sandwich filter (Geotech Environmental Equipment) equipped with a 0.2 um Supor membrane filter (Pall Corporation) and stored until analysis in the laboratory in a 60 mL LDPE bottle (Nalgene) that had been soaked for ~1 week in Citranox, an acidic detergent, rinsed with Milli-Q water (Millipore), soaked for ~2 weeks in 10% trace metal grade HCl (Optima), and rinsed with lightly acidic Milli-Q water (&lt;0.1% HCl). To preserve the samples for future analysis after the cruise, all samples were filled entirely with no remaining headspace, stored with one oxygen-absorbing satchel (Mitsubishi Gas Chemical, model RP-3K) per 60 mL water sample, heat-sealed in plastic bags, and stored at 4⁰C.</p>
<p>Dissolved cobalt (dCo) samples were analyzed in Nov-Dec 2017 by cathodic stripping voltammetry (CSV) as originally described by (Saito and Moffett 2001) and modified by (Saito et al. 2010; Hawco et al. 2016). One portion of the samples (stations 1-10) were analyzed in the Saito laboratory in Woods Hole, MA, and the remaining samples (stations 11-14) were analyzed at sea on the CICLOPS NBP-1801 cruise in the trace metal plastic "bubble". This was done so that all of the samples could be run together using the same batch of DMG and EPPS reagents.</p>
<p>Dissolved Co was measured using a Metrohm 663 VA and uAutolabIII system equipped with a hanging mercury drop working electrode. All reagents were run through treated Chelex-100 resin columns (BioRad) to remove trace metal contaminates, except DMG which was purified by recrystallization. The Chelex was resin prepared as described in (Price et al. 1988/89) and reagents were purified as described in Saito et al., 2002. 0.2 um filtered water samples were UV-irradiated in acid-washed quartz tubes for one hour using a water-cooled UV irradiation system (Metrohm 705 UV Digestor) to destroy natural ligand-bound Co complexes. Then, 11 mL of sample seawater was aliquoted into 15 mL acid-washed polypropylene vials, and 100 uL of 0.1 M dimethyglyoxime (DMG, Sigma Aldrich) and 130 uL of 0.5 M N-(2-hydroxyethyl)piperazine-N-(3-propanesulfonic acid) (EPPS, Sigma Aldrich) buffer was added. The samples were then processed on an autosampler (Metrohm 858 Sample Processor), which added 8.5 mL of the sample solution and 1.5 mL of a 1.5 M NaNO₂ reagent (Merck) to a Teflon cup for electrochemical analysis. The mercury electrode performed a fast linear sweep from -1.4 V to -0.6 V at a rate of 5 V s⁻¹, which reduced the Co bound in the Co(DMG)₂ complex from Co(II) to Co(0) and produced a Co reduction peak at -1.15 V (Saito and Moffett 2001) with a height linearly proportional to the amount of dCo present in the sample. A standard addition curve was generated for each sample analyzed with 4 automated additions of a 25 pM CoCl₂ (Fisher Scientific) standard made fresh in for this sample batch.</p>
Specified by the Principal Investigator(s)
<p><strong>Data Processing:</strong><br />
Peak heights were determined by NOVA 1.10 software. A linear regression of the standard addition peak heights allowed for the calculation of the initial amount of Co present in the sample, as described in (Saito and Moffett 2001). Triplicate technical replicates were run on every sample.</p>
<p><strong>Quality Flags:</strong><br />
The dataset includes quality assurance flags described in the GEOTRACES Quality Flag Policy, which is available at <a href="https://www.geotraces.org/geotraces-quality-flag-policy/" target="_blank">https://www.geotraces.org/geotraces-quality-flag-policy/</a>. Some dCo values reported are suspected misfires and are accordingly labeled with a QC flag of 3.<br />
Brief flag descriptions:<br />
0 = no quality control;<br />
1 = good value;<br />
2 = probably good value;<br />
3 = probably bad value;<br />
4 = bad value;<br />
5 = changed value;<br />
6 = value below detection;<br />
7 = value in excess;<br />
8 = interpolated value;<br />
9 = missing value.</p>
<p><strong>BCO-DMO Processing:</strong><br />
- renamed fields;<br />
- added fields for date-time in ISO8601 format;<br />
- replaced 'NaN' with 'nd' as the missing data identifier;<br />
- rounded Cobalt values as specified by data submitter;<br />
- 2022-09-08: made a correction to the Acquisition Description section of the metadata. The filter size used on dissolved Co subsamples was 0.2 um (not 0.4 um as previously stated).</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
Metrohm 858 Sample Processor
Metrohm 858 Sample Processor
PI Supplied Instrument Name: Metrohm 858 Sample Processor Instrument Name: Laboratory Autosampler Instrument Short Name: Instrument Description: Laboratory apparatus that automatically introduces one or more samples with a predetermined volume or mass into an analytical instrument.
Metrohm 663 VA and µAutolabIII system
Metrohm 663 VA and µAutolabIII system
PI Supplied Instrument Name: Metrohm 663 VA and µAutolabIII system Instrument Name: Metrohm 663 VA Stand mercury electrode Instrument Short Name:Metrohm 663 VA Instrument Description: The Metrohm 663 VA stand forms the wet chemical part of a polarographic and voltammetric analytical system. It features a mercury electrode, an Ag/AgCl reference electrode and a glassy carbon counter electrode. The size of the mercury drop and the stirrer speed are set manually on the VA Stand. The VA Stand can be operated in Dropping Mercury Electrode (DME), Hanging Mercury Drop Electrode (HMDE) and Static Mercury Drop Electrode (SMDE) modes. The VA Stand can be controlled by a potentiostat in conjunction with the Metrohm IME663 interface. Community Standard Description: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0515/
8 L X-Niskin bottles (Ocean Test Equipment)
8 L X-Niskin bottles (Ocean Test Equipment)
PI Supplied Instrument Name: 8 L X-Niskin bottles (Ocean Test Equipment) Instrument Name: Niskin bottle Instrument Short Name:Niskin bottle Instrument 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. Community Standard Description: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/
Metrohm 705 UV Digestor
Metrohm 705 UV Digestor
PI Supplied Instrument Name: Metrohm 705 UV Digestor Instrument Name: UV Digester Instrument Short Name: Instrument Description: Digestion instrument for UV photolysis of water samples
Cruise: FK160115
FK160115
R/V Falkor
Community Standard Description
International Council for the Exploration of the Sea
R/V Falkor
vessel
FK160115
Mak A. Saito
Woods Hole Oceanographic Institution
https://service.rvdata.us/data/cruise/FK160115/doc/FK160115_OfficialCruiseReport_Saito_v3.pdf
Report describing FK160115
R/V Falkor
Community Standard Description
International Council for the Exploration of the Sea
R/V Falkor
vessel