http://lod.bco-dmo.org/id/dataset/647580
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
2016-05-24
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Arsenate, iodide, and selenium concentrations collected from Super-GeoFish during the R/V Thomas G. Thompson cruise TN303 from Peru to Tahiti in 2013 (U.S. GEOTRACES EPZT project)
2017-01-03
publication
2017-01-03
revision
BCO-DMO Linked Data URI
2017-01-03
creation
http://lod.bco-dmo.org/id/dataset/647580
Gregory A. Cutter
Old Dominion University
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: Cutter, G. A. (2017) Arsenate, iodide, and selenium concentrations collected from Super-GeoFish during the R/V Thomas G. Thompson cruise TN303 from Peru to Tahiti in 2013 (U.S. GEOTRACES EPZT project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2017-01-03 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/647580 [access date]
Arsenate, Iodide, Selenium depth profiles collected from the Super-GeoFish Dataset Description: <p>Data include dissolved species concentrations from&nbsp;EPZT GEOTRACES stations:&nbsp;Selenite (SeIV), Selenate (SeVI), Organic selenide (Org Se-II), Total Se, &amp; elemental Se,&nbsp;arsenate (AsV), arsenite (AsIII), iodide and iodate. &nbsp;All data in this dataset were collected using a towed the Super-GeoFish (FISH)&nbsp;surface water sampler.</p> Methods and Sampling: <p>Clean seawater samples were collected with the Super-GeoFish, a towed, near-surface sampler.&nbsp;Selenium, Iodine and Arsenic species concentrations were processed with separate methodology as described below and&nbsp;in the "Processing Description" section. GeoFish deployments occurred at GEOTRACES EPZT stations (STNNBR in the dataset).</p>
<p>See&nbsp;<a href="http://www.bco-dmo.org/dataset-instrument/642980">GeoFish Instrument Description</a>&nbsp;for information about operations and deployment.</p>
<p><strong>Selenium:&nbsp;</strong>For dissolved samples 0.45 um Supor membrane filtered seawater samples were placed into 1 L borosilicate glass bottles and acidified to pH &lt; 2 by&nbsp;addition&nbsp;of 4 mL 6 M HCl. Samples were stored at room temperature in the dark.</p>
<p><strong>Iodide/Iodate:&nbsp;</strong>Samples were pressurized with 6 psi nitrogen and seawater was passed through 0.2 um syringe filters into 60 mL all-polyethylene syringes fitted with 3-way polycarbonate valves to prevent contact with atmosphere before analysis.&nbsp;</p>
<p><strong>Arsenic:&nbsp;</strong>0.45 um filtered seawater samples were placed into 500 mL Teflon FEP bottles, refrigerated, and analyzed within 24 hours of collection.&nbsp;</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1235328 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1235328
completed
Gregory A. Cutter
Old Dominion University
757-683-4929
Department of Ocean, Earth, and Atmospheric Sciences 4500 Elkhorn Ave
Norfolk
VA
23529-0276
USA
gcutter@odu.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
STNNBR
GEOTRC_EVENTNO
GEOTRC_SAMPNO
EVENT_LON
EVENT_LAT
BTMDEPTH
DEPTH
SAMPNO
BTLNBR
PI_DATE
PI_TIME
As_III_D_CONC_FISH
As_V_D_CONC_FISH
Se_TD_CONC_FISH
Se_IV_D_CONC_FISH
Se_VI_D_CONC_FISH
Org_Se_II_CONC_FISH
IODIDE_D_CONC_FISH
IO3_D_CONC_FISH
ISO_DATETIME_UTC_START_EVENT
SECT_ID
cruise_id
BASi model CGME electrode
FISH
selective hydride generation/atomic absorption spectrometry
Shimadzu 160 UV
theme
None, User defined
station
event
sample identification
longitude
latitude
depth_bottom
depth
bottle
date
time of day
trace element concentration
ISO_DateTime_UTC
transect
Cruise identfier
featureType
BCO-DMO Standard Parameters
BASi Controlled Growth Mercury Electrode
GeoFish Towed near-Surface Sampler
Spectrophotometer
UV Spectrophotometer-Shimadzu
instrument
BCO-DMO Standard Instruments
TN303
service
Deployment Activity
Eastern Tropical Pacific - Transect from Peru to Tahiti
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
http://www.geotraces.org/
U.S. GEOTRACES
GEOTRACES is a SCOR sponsored program; and funding for program infrastructure development is provided by the U.S. National Science Foundation.
GEOTRACES gained momentum following a special symposium, S02: Biogeochemical cycling of trace elements and isotopes in the ocean and applications to constrain contemporary marine processes (GEOSECS II), at a 2003 Goldschmidt meeting convened in Japan. The GEOSECS II acronym referred to the Geochemical Ocean Section Studies To determine full water column distributions of selected trace elements and isotopes, including their concentration, chemical speciation, and physical form, along a sufficient number of sections in each ocean basin to establish the principal relationships between these distributions and with more traditional hydrographic parameters;
* To evaluate the sources, sinks, and internal cycling of these species and thereby characterize more completely the physical, chemical and biological processes regulating their distributions, and the sensitivity of these processes to global change; and
* To understand the processes that control the concentrations of geochemical species used for proxies of the past environment, both in the water column and in the substrates that reflect the water column.
GEOTRACES will be global in scope, consisting of ocean sections complemented by regional process studies. Sections and process studies will combine fieldwork, laboratory experiments and modelling. Beyond realizing the scientific objectives identified above, a natural outcome of this work will be to build a community of marine scientists who understand the processes regulating trace element cycles sufficiently well to exploit this knowledge reliably in future interdisciplinary studies.
Expand "Projects" below for information about and data resulting from individual US GEOTRACES research projects.
U.S. GEOTRACES
largerWorkCitation
program
U.S. GEOTRACES East Pacific Zonal Transect (GP16)
http://www.geotraces.org/
U.S. GEOTRACES East Pacific Zonal Transect (GP16)
<p><strong>From the NSF Award Abstract</strong><br />
The mission of the International GEOTRACES Program (<a href="https://www.geotraces.org/" target="_blank">https://www.geotraces.org/</a>), of which the U.S. chemical oceanography research community is a founding member, is "to identify processes and quantify fluxes that control the distributions of key trace elements and isotopes in the ocean, and to establish the sensitivity of these distributions to changing environmental conditions" (GEOTRACES Science Plan, 2006). In the United States, ocean chemists are currently in the process of organizing a zonal transect in the eastern tropical South Pacific (ETSP) from Peru to Tahiti as the second cruise of the U.S.GEOTRACES Program. This Pacific section includes a large area characterized by high rates of primary production and particle export in the eastern boundary associated with the Peru Upwelling, a large oxygen minimum zone that is a major global sink for fixed nitrogen, and a large hydrothermal plume arising from the East Pacific Rise. This particular section was selected as a result of open planning workshops in 2007 and 2008, with a final recommendation made by the U.S.GEOTRACES Steering Committee in 2009. It is the first part of a two-stage plan that will include a meridional section of the Pacific from Tahiti to Alaska as a subsequent expedition.</p>
<p>This award provides funding for management of the U.S.GEOTRACES Pacific campaign to a team of scientists from the University of Southern California, Old Dominion University, and the Woods Hole Oceanographic Institution. The three co-leaders will provide mission leadership, essential support services, and management structure for acquiring the trace elements and isotopes samples listed as core parameters in the International GEOTRACES Science Plan, plus hydrographic and nutrient data needed by participating investigators. With this support from NSF, the management team will (1) plan and coordinate the 52-day Pacific research cruise described above; (2) obtain representative samples for a wide variety of trace metals of interest using conventional CTD/rosette and GEOTRACES Sampling Systems; (3) acquire conventional JGOFS/WOCE-quality hydrographic data (CTD, transmissometer, fluorometer, oxygen sensor, etc) along with discrete samples for salinity, dissolved oxygen (to 1 uM detection limits), plant pigments, redox tracers such as ammonium and nitrite, and dissolved nutrients at micro- and nanomolar levels; (4) ensure that proper QA/QC protocols are followed and reported, as well as fulfilling all GEOTRACES Intercalibration protocols; (5) prepare and deliver all hydrographic-type data to the GEOTRACES Data Center (and US data centers); and (6) coordinate cruise communications between all participating investigators, including preparation of a hydrographic report/publication.</p>
<p>Broader Impacts: The project is part of an international collaborative program that has forged strong partnerships in the intercalibration and implementation phases that are unprecedented in chemical oceanography. The science product of these collective missions will enhance our ability to understand how to interpret the chemical composition of the ocean, and interpret how climate change will affect ocean chemistry. Partnerships include contributions to the infrastructure of developing nations with overlapping interests in the study area, in this case Peru. There is a strong educational component to the program, with many Ph.D. students carrying out thesis research within the program.</p>
<p><em>Figure 1. The 2013 GEOTRACES EPZT Cruise Track. [click on the image to view a larger version]</em><br />
<a href="http://dmoserv3.whoi.edu/data_docs/GEOTRACES/EPZT/GEOTRACES_EPZT_TN303_CruiseTrack.png" target="_blank"><img alt="" src="https://datadocs.bco-dmo.org/d3/data_docs/GEOTRACES/EPZT/GEOTRACES_EPZT_TN303_CruiseTrack.png" /></a></p>
U.S. GEOTRACES EPZT
largerWorkCitation
project
US GEOTRACES Pacific section: Characterizing the redox environment of the eastern tropical Pacific Ocean
https://osprey.bco-dmo.org/project/647929
US GEOTRACES Pacific section: Characterizing the redox environment of the eastern tropical Pacific Ocean
<p><em>Extracted from the NSF award abstract:</em></p>
<p>The 2013 GEOTRACES Eastern Pacific Zonal Transect from Peru to Tahiti will cross an entensive oxygen deficient zone typically described as "suboxic"; however, measurements of sulfate reduction in this region suggest it may have some anoxic characteristics due to the presence of free sulfide. Redox conditions influence the solubility/stability of many trace elements which in turn affects their vertical and horizontal transport. A scientist from Old Dominion University plans to analyze water samples collected during the cruise for dissolved iodate/iodide, arsenic [As(III)/As(V)], selenium [Se(IV, VI), particulate Se(0), and nano- to picomolar hydrogen sulfide speciation (total, free/uncomplexed). These measurements, along with nitrate/nitrite, nitrous oxide, and iron species determined by other participants during the cruise, will be used to constrain the range of redox conditions within the oxygen deficient zone, assess the importance of in-situ reduction versus horizontal advection of the redox species, and the changing redox conditions within the hydrothermal plume of the East Pacific Rise. Availability of this data will also enable other researchers to determine the behavior of other redox sensitive trace elements in the ocean.</p>
EPZT_Redox_Elements
largerWorkCitation
project
eng; USA
oceans
Eastern Tropical Pacific - Transect from Peru to Tahiti
-152.079
-77.4325
-15.9916
-10.224
2013-10-29
2013-12-16
From projects that focused on the following 2 locations: 1. Eastern Tropical Pacific - Transect from Peru to Tahiti (GP16) 2. Eastern Pacific
0
BCO-DMO catalogue of parameters from Arsenate, iodide, and selenium concentrations collected from Super-GeoFish during the R/V Thomas G. Thompson cruise TN303 from Peru to Tahiti in 2013 (U.S. GEOTRACES EPZT 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
http://lod.bco-dmo.org/id/dataset-parameter/647631.rdf
Name: STNNBR
Units: unitless
Description: <p>Station number.</p>
http://lod.bco-dmo.org/id/dataset-parameter/647632.rdf
Name: GEOTRC_EVENTNO
Units: unitless
Description: <p>GEOTRACES event number.</p>
http://lod.bco-dmo.org/id/dataset-parameter/647633.rdf
Name: GEOTRC_SAMPNO
Units: unitless
Description: <p>GEOTRACES sample number.</p>
http://lod.bco-dmo.org/id/dataset-parameter/647634.rdf
Name: EVENT_LON
Units: decimal degrees
Description: <p>Longitude according to the event log; West is negative</p>
http://lod.bco-dmo.org/id/dataset-parameter/647635.rdf
Name: EVENT_LAT
Units: decimal degrees
Description: <p>Latitude at the start of the event, according to the event log.</p>
http://lod.bco-dmo.org/id/dataset-parameter/647636.rdf
Name: BTMDEPTH
Units: meters
Description: <p>bottom Depth</p>
http://lod.bco-dmo.org/id/dataset-parameter/647637.rdf
Name: DEPTH
Units: meters
Description: <p>depth of sample</p>
http://lod.bco-dmo.org/id/dataset-parameter/647638.rdf
Name: SAMPNO
Units: unitless
Description: <p>Bottle sample number</p>
http://lod.bco-dmo.org/id/dataset-parameter/647639.rdf
Name: BTLNBR
Units: unitless
Description: <p>Bottle number</p>
http://lod.bco-dmo.org/id/dataset-parameter/647640.rdf
Name: PI_DATE
Units: unitless
Description: <p>PI-supplied date in format YYYYMMDD</p>
http://lod.bco-dmo.org/id/dataset-parameter/647641.rdf
Name: PI_TIME
Units: unitless
Description: <p>PI-supplied time in format HHMM</p>
http://lod.bco-dmo.org/id/dataset-parameter/647642.rdf
Name: As_III_D_CONC_FISH
Units: nanomoles per liter
Description: <p>dissolved Arsenite concentration from GeoFish</p>
http://lod.bco-dmo.org/id/dataset-parameter/647643.rdf
Name: As_V_D_CONC_FISH
Units: nanomoles per liter
Description: <p>dissolved Arsenate concentration from GeoFish</p>
http://lod.bco-dmo.org/id/dataset-parameter/647644.rdf
Name: Se_TD_CONC_FISH
Units: nanomoles per liter
Description: <p>total dissolved Selenium concentration from GeoFish</p>
http://lod.bco-dmo.org/id/dataset-parameter/647645.rdf
Name: Se_IV_D_CONC_FISH
Units: nanomoles per liter
Description: <p>dissolved Selenite concentration from GeoFish</p>
http://lod.bco-dmo.org/id/dataset-parameter/647646.rdf
Name: Se_VI_D_CONC_FISH
Units: nanomoles per liter
Description: <p>dissolved Selenate concentration from GeoFish</p>
http://lod.bco-dmo.org/id/dataset-parameter/647647.rdf
Name: Org_Se_II_CONC_FISH
Units: nanomoles per liter
Description: <p>organic Selenide concentration from GeoFish</p>
http://lod.bco-dmo.org/id/dataset-parameter/647648.rdf
Name: IODIDE_D_CONC_FISH
Units: nanomoles per liter
Description: <p>dissolved iodide concentration from GeoFish</p>
http://lod.bco-dmo.org/id/dataset-parameter/647649.rdf
Name: IO3_D_CONC_FISH
Units: nanomoles per liter
Description: <p>dissolved iodade concentration from GeoFish</p>
http://lod.bco-dmo.org/id/dataset-parameter/647670.rdf
Name: ISO_DATETIME_UTC_START_EVENT
Units: unitless
Description: <p>Date and time (UTC) at start of the event according to the event log. Format is ISO 8601 standard YYYY-mm-ddTHH:MM:SS.xxZ. Values were added from the intermediate US GEOTRACES master file (see Processing Description).</p>
http://lod.bco-dmo.org/id/dataset-parameter/672201.rdf
Name: SECT_ID
Units: unitless
Description: <p>transect identifier for GEOTRACES Eastern Pacific Zonal Transect (EPZT)</p>
http://lod.bco-dmo.org/id/dataset-parameter/672202.rdf
Name: cruise_id
Units: untiless
Description: <p>cruise identifier</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
5910
https://datadocs.bco-dmo.org/file/g77yq17CPG4OGG/As_Se_IO_FISH.csv
As_Se_IO_FISH.csv
Primary data file for dataset ID 647580
download
https://osprey.bco-dmo.org/dataset/647580/data/download
download
onLine
dataset
<p>Clean seawater samples were collected with the Super-GeoFish, a towed, near-surface sampler.&nbsp;Selenium, Iodine and Arsenic species concentrations were processed with separate methodology as described below and&nbsp;in the "Processing Description" section. GeoFish deployments occurred at GEOTRACES EPZT stations (STNNBR in the dataset).</p>
<p>See&nbsp;<a href="http://www.bco-dmo.org/dataset-instrument/642980">GeoFish Instrument Description</a>&nbsp;for information about operations and deployment.</p>
<p><strong>Selenium:&nbsp;</strong>For dissolved samples 0.45 um Supor membrane filtered seawater samples were placed into 1 L borosilicate glass bottles and acidified to pH &lt; 2 by&nbsp;addition&nbsp;of 4 mL 6 M HCl. Samples were stored at room temperature in the dark.</p>
<p><strong>Iodide/Iodate:&nbsp;</strong>Samples were pressurized with 6 psi nitrogen and seawater was passed through 0.2 um syringe filters into 60 mL all-polyethylene syringes fitted with 3-way polycarbonate valves to prevent contact with atmosphere before analysis.&nbsp;</p>
<p><strong>Arsenic:&nbsp;</strong>0.45 um filtered seawater samples were placed into 500 mL Teflon FEP bottles, refrigerated, and analyzed within 24 hours of collection.&nbsp;</p>
Specified by the Principal Investigator(s)
<p>Samples analyzed in triplicate and means computed. Standard additions of selenite were used for daily calibration on a representative sample and its slope applied to subsequent samples.</p>
<p><strong>Iodide </strong>concentrations were determined using cathodic square wave stripping analysis following Luther at al. (1988) and Tian and Nicolas (1995). A BASi model CGME electrode was used as follows: 10 mL sample and 100 mL 0.1% Triton, 5 min purge with oxygen free nitrogen, 0.2 mL addition of 1 M sodium sulfite to remove any remaining oxygen, followed by 1 min of purging. The voltammogram was recorded three times under the following conditions: drop size 11, deposition time 90 s, quiet time 5 s, scan increment 2 mV, scan range –120 mV to -700 mV, frequency 125 Hz and amplitude 25 mV. Precision was 1.9% RSD (n=10) and sensitivity 4.07 nA/nM. The method was calibrated using standard additions, with standards made from AnalR grade potassium iodide.</p>
<p><strong>Iodate</strong> was determined with the Wong and Brewer (1974) method using a spectrometer (Shimadzu 160 UV). In brief, a sample in a 10 cm quartz cuvette is acidified with sulfuric acid containing sulfanilamide to remove nitrite interference (Chapman and Liss 1977; Rue, Smith et al. 1997) and iodide added to form tri-iodide that is then determined at a wavelength of 535 nm. Standard addition of potassium iodate (Analar grade) was used for daily calibration on a representative sample and its slope applied to subsequent samples. Duplicate samples were run for every depth; triplicate samples were determined for the 0 addition seawater to allow an estimate of precision. Precision was better than 5% RSD at concentration above 100 nmol/L.</p>
<p><strong>Dissolved selenite, selenite+ selenate, and total dissolved selenium </strong>concentrations were determined in triplicate using selective hydride generation/atomic absorption spectrometry following Cutter (1978), Cutter (1983), and Cutter and Bruland (1984). The standard addition method of calibration was used to assure accuracy (one sample on an analysis day was used and its slope applied to the other samples on that day). Selenate was calculated as the difference between selenite+selenate and selenite determinations, while organic selenide was the difference between total dissolved selenium and selenite+selenate determinations. Precision was always less than 10% RSD, but typically less than 5% RSD at the observed concentrations. Detection limits were 0.02 nmol/L for all selenium species.</p>
<p><strong>&nbsp;Particulate elemental selenium</strong> concentrations were determined using a sulfite leach following Velinsky and Cutter (1990) and analyzed like selenite+selenate following Cutter (1978).&nbsp; Precision was ca. 10% RSD (n=3).&nbsp;</p>
<p><strong>Arsenic speciation</strong> was determined using selective hydride generation, liquid nitrogen-cooled trapping, and then revolatilization and determination with gas chromatography/photoionization detection (Cutter et al., 1991; Cutter and Cutter, 2006). Calibration performed daily via the standard additions method, with a minimum of 4 additions of AsIII and AsV. The slope from the linear fit to these data was then applied to all samples for that day. Detection limits were 25 pmol/L for As(III) and As(V). Precision was better than 8% RSD.</p>
<p><strong>DMO notes (for current data version &nbsp;23 Dec 2016):</strong><br />
* new version of data based on re-submission<br />
* removed column name cruise_id as it was actually the section id (EPZT) and all data came from the same cruise TN303<br />
* did not add a column "SECT_ID" for value "EPZT" as was done in previous data version<br />
* padded time column with leading 0 if hours was less than 2 digits (e.g. 836-&gt; 0836)</p>
<p><strong>DMO notes (for data version 03 Jan 2017):</strong><br />
* changed "Cruise" (value&nbsp;EPZT&nbsp;throughout)&nbsp;to SECT_ID<br />
* added new column "cruise_id" with value&nbsp;TN303<br />
&nbsp;*&nbsp;DATE,TIME&nbsp;to&nbsp;PI_DATE,PI_TIME&nbsp;as this did not match the event times (~15-20 min difference)<br />
* variable names changed to conform to&nbsp;GEOTRACES conventions<br />
* padded time column with leading 0 if hours was less than 2 digits (e.g. 836-&gt; 0836)</p>
<p dir="ltr"><strong>Additional GEOTRACES Processing:</strong></p>
<p dir="ltr">As was done for the GEOTRACES-NAT data, BCO-DMO added standard US GEOTRACES information, such as the US GEOTRACES event number, to each submitted dataset lacking this information. To accomplish this, BCO-DMO compiled a 'master' dataset composed of the following parameters:</p>
<p dir="ltr">cruise_id, EXPOCODE,SECT_ID, STNNBR, CASTNO, GEOTRC_EVENTNO, GEOTRC_SAMPNO, GEOTRC_INSTR, SAMPNO, GF_NO, BTLNBR, BTLNBR_FLAG_W, DATE_START_EVENT, TIME_START_EVENT, ISO_DATETIME_UTC_START_EVENT, EVENT_LAT, EVENT_LON, DEPTH_MIN, DEPTH_MAX, &nbsp;BTL_DATE, BTL_TIME, BTL_ISO_DATETIME_UTC, BTL_LAT, BTL_LON, ODF_CTDPRS, SMDEPTH, FMDEPTH, BTMDEPTH, CTDPRS, CTDDEPTH.</p>
<p dir="ltr">This added information will facilitate subsequent analysis and inter comparison of the datasets.</p>
<p dir="ltr">Bottle parameters in the master file were taken from the GT-C_Bottle and ODF_Bottle datasets. Non-bottle parameters, including those from GeoFish tows, Aerosol sampling, and McLane Pumps, were taken from the TN303 Event Log (version 30 Oct 2014). Where applicable, pump information was taken from the PUMP_Nuts_Sals dataset.</p>
<p dir="ltr">A standardized BCO-DMO method (called "join") was then used to merge the missing parameters to each US GEOTRACES dataset, most often by matching on sample_GEOTRC or on some unique combination of other parameters.</p>
<p dir="ltr">If the master parameters were included in the original data file and the values did not differ from the master file, the original data columns were retained and the names of the parameters were changed from the PI-submitted names to the standardized master names. If there were differences between the PI-supplied parameter values and those in the master file, both columns were retained. If the original data submission included all of the master parameters, no additional columns were added, but parameter names were modified to match the naming conventions of the master file.</p>
<p dir="ltr">See the dataset parameters documentation for a description of which parameters were supplied by the PI and which were added via the join method.</p>
<p><strong>References:&nbsp;</strong></p>
<p>Chapman, P. and P. S. Liss (1977). "Effect of nitrite on spectrophotometric determination of iodate in seawater." Marine Chemistry 5(3): 243-249.&nbsp;<a href="http://dx.doi.org/10.1016/0304-4203(77)90019-6">http://dx.doi.org/10.1016/0304-4203(77)90019-6</a></p>
<p>Cutter, G. A., and K. W. Bruland. "The marine biogeochemistry of selenium: A re‐evaluation." Limnology and Oceanography 29.6 (1984): 1179-1192.&nbsp;<a href="http://dx.doi.org/10.4319/lo.1984.29.6.1179">http://dx.doi.org/10.4319/lo.1984.29.6.1179</a></p>
<p>Cutter, G.A. and L.S. Cutter. 2006. The biogeochemistry of arsenic and antimony in the North Pacific Ocean. Geochem. Geophys. Geosystems (G3), 7, Q05M08, <a href="http://dx.doi.org/10.1029/2005gc001159">http://dx.doi.org/10.1029/2005gc001159</a></p>
<p>Cutter, Gregory A. "Elimination of nitrite interference in the determination of selenium by hydride generation." Analytica Chimica Acta 149 (1983): 391-94.&nbsp;<a href="http://dx.doi.org/10.1016/s0003-2670(00)83200-6">http://dx.doi.org/10.1016/s0003-2670(00)83200-6</a></p>
<p>Cutter, Gregory. "Species Determination of Selenium in Natural Waters." Analytica Chimica Acta 98 (1978): 59-66.&nbsp;<a href="http://dx.doi.org/10.1016/s0003-2670(01)83238-4">http://dx.doi.org/10.1016/s0003-2670(01)83238-4</a></p>
<p>Cutter, L.S., G.A. Cutter, and M.L.C. San Diego McGlone. 1991. Simultaneous determination &nbsp; of inorganic arsenic and antimony species in natural waters using selective hydride generation with gas chromatography/photoionization detection. Anal. Chem. 63:1138 1142.&nbsp;<a href="http://dx.doi.org/10.1021/ac00011a015">http://dx.doi.org/10.1021/ac00011a015</a></p>
<p>Luther, G. W., C. B. Swartz, et al. (1988). "Direct determination of iodide in seawater by cathodic stripping square-wave voltammetry." Analytical Chemistry 60(17): 1721-1724.<a href="http://dx.doi.org/10.1021/ac00168a017">&nbsp;</a><a href="http://dx.doi.org/10.1021/ac00168a017">http://dx.doi.org/10.1021/ac00168a017</a></p>
<p>Rue, E. L., G. J. Smith, et al. (1997). "The response of trace element redox couples to suboxic conditions in the water column." Deep-Sea Research Part I-Oceanographic Research Papers 44(1): 113-134.&nbsp;<a href="http://dx.doi.org/10.1016/s0967-0637(96)00088-x">http://dx.doi.org/10.1016/s0967-0637(96)00088-x</a></p>
<p>Tian, R. C. and E. Nicolas (1995). "Iodine speciation in the northwestern mediterranean-sea - method and vertical profile." Marine Chemistry 48(2): 151-156.&nbsp;<a href="http://dx.doi.org/10.1016/0304-4203(94)00048-i">http://dx.doi.org/10.1016/0304-4203(94)00048-i</a></p>
<p>Velinsky, D.J., and G.A. Cutter. "Determination of elemental selenium and pyrite-selenium in sediments." Analytica Chimica Acta 235 (1990): 419-425.&nbsp;<a href="http://dx.doi.org/10.1016/s0003-2670(00)82102-9">http://dx.doi.org/10.1016/s0003-2670(00)82102-9</a></p>
<p>Wong, G. T. F. and P. G. Brewer (1974). "Determination and distribution of iodate in south-atlantic waters." Journal of Marine Research 32(1): 25-36</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
BASi model CGME electrode
BASi model CGME electrode
PI Supplied Instrument Name: BASi model CGME electrode Instrument Name: BASi Controlled Growth Mercury Electrode Instrument Short Name:BASI CGME Instrument Description: Bioanalytical Systems (BASi) Mercury drop electrodes are generated by the BASi Controlled Growth Mercury Electrode (CGME) in three modes:
DME (Dropping Mercury Electrode) - mercury is allowed to flow freely from the reservoir down the capillary and so the growth of the mercury drop and its lifetime is controlled by gravity. (The optional 100 um capillary is recommended for this mode.)
SMDE (Static Mercury Drop Electrode) - the drop size is determined by the length of time for which the fast-response capillary valve is opened, and the drop is dislodged by a drop knocker. The dispense/knock timing is microprocessor-controlled and is typically coordinated with the potential pulse or square-wave waveform. This mode can also used to generate the Hanging Mercury Drop Electrode required for stripping experiments.
CGME (Controlled Growth Mercury Electrode) - the mercury drop is grown by a series of pulses that open the capillary valve. The number of pulses, their duration, and their frequency can be varied by PC control, providing great flexibility in both the drop size and its rate of growth. This CGME mode can be used for both polarographic and stripping experiments.
http://www.basinc.com/products/ec/cgme.php
FISH
FISH
PI Supplied Instrument Name: FISH 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/
selective hydride generation/atomic absorption spectrometry
selective hydride generation/atomic absorption spectrometry
PI Supplied Instrument Name: selective hydride generation/atomic absorption spectrometry Instrument Name: Spectrophotometer Instrument Short Name:Spectrophotometer Instrument Description: An instrument used to measure the relative absorption of electromagnetic radiation of different wavelengths in the near infra-red, visible and ultraviolet wavebands by samples. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB20/
Shimadzu 160 UV
Shimadzu 160 UV
PI Supplied Instrument Name: Shimadzu 160 UV Instrument Name: UV Spectrophotometer-Shimadzu Instrument Short Name:UV Spectrophotometer-Shimadzu Instrument Description: The Shimadzu UV Spectrophotometer is manufactured by Shimadzu Scientific Instruments (ssi.shimadzu.com). Shimadzu manufacturers several models of spectrophotometer; refer to dataset for make/model information. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB20/
Cruise: TN303
TN303
R/V Thomas G. Thompson
Community Standard Description
International Council for the Exploration of the Sea
R/V Thomas G. Thompson
vessel
TN303
James W. Moffett
University of Southern California
http://dmoserv3.whoi.edu/data_docs/GEOTRACES/EPZT/GT13_EPZT_ODFReport_All.pdf
Report describing TN303
R/V Thomas G. Thompson
Community Standard Description
International Council for the Exploration of the Sea
R/V Thomas G. Thompson
vessel