http://lod.bco-dmo.org/id/dataset/650340
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
2016-06-30
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Radium isotopes collected on R/V Thomas G. Thompson cruise TN303 in the Eastern Tropical Pacific in 2013 (U.S. GEOTRACES EPZT project)
2016-06-29
publication
2016-06-29
revision
BCO-DMO Linked Data URI
2016-06-29
creation
http://lod.bco-dmo.org/id/dataset/650340
Matthew A. Charette
Woods Hole Oceanographic Institution
principalInvestigator
Willard S. Moore
University of South Carolina
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: Charette, M. A., Moore, W. S. (2016) Radium isotopes collected on R/V Thomas G. Thompson cruise TN303 in the Eastern Tropical Pacific in 2013 (U.S. GEOTRACES EPZT project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 29 June 2016) Version Date 2016-06-29 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/650340 [access date]
Radium isotopes collected on the GEOTRACES EPZT cruise. Dataset Description: <p>Radium and Thorium isotopes were collected on manganese oxide impregnated cartridges using an in situ pump filtering 1500-2000L at depth, while ~1000L surface samples were collected by hanging manganese oxide impregnated acrylic fibers over the side of the ship.&nbsp;Samples were collected for Radium Isotopes ex223Ra (227Ac corrected), ex224Ra (228Th corrected), 226Ra, 228Ra, 228Th (particulate), 228Th (dissolved), and 228Th (total). <strong>Only 226Ra and 228Ra are reported in this version of the dataset.</strong> Future versions will include the other Ra isotopes and 228Th.</p>
<p><strong>Related files and references: </strong>&nbsp;<br />
Cartridge preparation:&nbsp;<br />
Henderson, P. B., Morris, P. J., Moore, W. S., and Charette, M. A.: Methodological advances for measuring low-level radium isotopes in seawater, J. Radioanal. Nucl. Chem., 293, 1–6, doi:<a href="http://dx.doi.org/10.1007/s10967-012-2047-9" target="_blank">10.1007/s10967-012-2047-9</a>, 2012.</p>
<p>Particulate and dissolved 228Th determination:<br />
Maiti, K., Charette, M.A., Buesseler, K.O., Zhou, K., Henderson, P., Moore, W.S., Morris, P., Kipp, L., 2015. Determination of particulate and dissolved <sup>228</sup>Th in seawater using a delayed coincidence counter. Mar. Chem. doi:<a href="http://dx.doi.org/10.1016/j.marchem. 2014.12.001" target="_blank">10.1016/j.marchem. 2014.12.001</a>.&nbsp;</p> Methods and Sampling: <p>Radium was collected onto an manganese coated cartridge filtered at depth using an adapted McLane (WTS-LV). The pumps were programmed to filter 1500-2000L of seawater per deployment. Water (15-25 L) was also collected at the same depth using a 30L Niskin bottle; these samples were filtered (at &lt;1L/min) through a manganese coated acrylic fiber and used calculate radium extraction efficiency of the pumped samples. The cartridges were rinsed with radium-free fresh water and excess moisture was removed using compressed air. Samples were analyzed three times using an Alpha delayed coincidence counter (RaDeCC) for 223Ra, 224Ra, 228Th, and 227Ac. The cartridge and fiber media were ashed at 820 degrees C and measured on gamma detectors for long lived radium (226Ra, 228Ra) and thorium isotopes. 226Ra was determined via alpha scintillation counting of the Niskin bottle Mn fiber samples.</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1232669 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1232669
onGoing
Matthew A. Charette
Woods Hole Oceanographic Institution
508-289-3205
Marine Chemistry & Geochemistry Clark 439, MS#25
Woods Hole
MA
02543
USA
mcharette@whoi.edu
pointOfContact
Willard S. Moore
University of South Carolina
Department of Earth & Ocean Sciences EWS 617, 701 Sumter St.
Columbia
SC
29208
USA
moore@geol.sc.edu
pointOfContact
asNeeded
Dataset Version: 29 June 2016
Unknown
cruise_id
cruise_name
STNNBR
GEOTRC_EVENTNO
DATE_PI
LAT_PI
LON_PI
ISO_DATETIME_UTC_START_EVENT
EVENT_LAT
EVENT_LON
GEOTRC_SAMPNO
CASTNO
SAMPNO
GEOTRC_INSTR
DEPTH
Ra_228_D_CONC_PUMP
Ra_228_D_CONC_PUMP_FLAG
Ra_228_D_CONC_PUMP_ERR
Ra_226_D_CONC_PUMP
Ra_226_CONC_D_PUMP_FLAG
Ra_226_CONC_D_PUMP_ERR
McLane (WTS-LV)
Alpha delayed coincidence counter (RaDeCC)
theme
None, User defined
cruise_id
cruise name
station
event
date
latitude
longitude
ISO_DateTime_UTC
sample identification
cast
bottle
instrument
depth
radioactive isotope concentration
flag
standard error
featureType
BCO-DMO Standard Parameters
McLane Large Volume Pumping System WTS-LV
Radium Delayed Coincidence Counter
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 Zonal Transect: Rates of supply, removal and internal cycling of trace elements and isotopes
https://osprey.bco-dmo.org/project/648150
US GEOTRACES Pacific Zonal Transect: Rates of supply, removal and internal cycling of trace elements and isotopes
<p><em>Description from NSF award abstract:</em><br />
The goal of GEOTRACES is to identify processes and quantify fluxes that control the distribution of trace elements and isotopes (TEIs) in the ocean, and to establish the sensitivity of these distributions to changing environmental conditions. While the distribution of numerous TEIs will be mapped by a large team of GEOTRACES PIs along this transect, their distribution cannot be properly interpreted without concurrent measurement of tracers capable of providing rates of internal TEI cycling processes and fluxes at boundaries and across interfaces. Naturally-occurring radioisotopes of the Uranium-Thorium series are well suited for studying the sources and sinks of TEIs on time and space scales necessary to interpret lateral and vertical TEI distributions.</p>
<p>In this project, a research team from the Woods Hole Oceanographic Institution and the University of South Carolina at Columbia will carry out measurement of a suite of uranium/thorium series radionuclides on the US GEOTRACES cruise to the Eastern Tropical South Pacific (ETSP) Ocean. This radiotracer suite will include shorter-lived 234Th and 228Th as well as the radium quartet (224Ra, 223Ra, 228Ra, 226Ra), which together allow the quantification of rates of horizontal and vertical transport and mixing, as well as removal at ocean boundaries, surface export, and subsurface remineralization.</p>
EPZT TEI Rates
largerWorkCitation
project
eng; USA
oceans
Eastern Tropical Pacific - Transect from Peru to Tahiti
2016-06-29
From projects that focused on the following 2 locations: 1. Eastern Tropical Pacific - Transect from Peru to Tahiti (GP16) 2. East Pacific
0
BCO-DMO catalogue of parameters from Radium isotopes collected on R/V Thomas G. Thompson cruise TN303 in the Eastern Tropical Pacific 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/650348.rdf
Name: cruise_id
Units: unitless
Description: <p>Cruise identification</p>
http://lod.bco-dmo.org/id/dataset-parameter/650349.rdf
Name: cruise_name
Units: unitless
Description: <p>Alternate cruise identifier</p>
http://lod.bco-dmo.org/id/dataset-parameter/650350.rdf
Name: STNNBR
Units: unitless
Description: <p>Station number</p>
http://lod.bco-dmo.org/id/dataset-parameter/650351.rdf
Name: GEOTRC_EVENTNO
Units: unitless
Description: <p>GEOTRACES event number; added from the EPZT master file.</p>
http://lod.bco-dmo.org/id/dataset-parameter/650352.rdf
Name: DATE_PI
Units: unitless
Description: <p>Date in YYYYmmdd format; provided by the PI.</p>
http://lod.bco-dmo.org/id/dataset-parameter/650353.rdf
Name: LAT_PI
Units: decimal degrees
Description: <p>Latitude ; provided by the PI.</p>
http://lod.bco-dmo.org/id/dataset-parameter/650354.rdf
Name: LON_PI
Units: decimal degrees
Description: <p>Longitude; provided by the PI.</p>
http://lod.bco-dmo.org/id/dataset-parameter/650355.rdf
Name: ISO_DATETIME_UTC_START_EVENT
Units: YYYY-MM-DDTHH:MM:SS[.xx]Z
Description: <p>Date and time, formatted to the ISO 8601 standard, at the start of the sampling event, according to the event log.</p>
http://lod.bco-dmo.org/id/dataset-parameter/650356.rdf
Name: EVENT_LAT
Units: decimal degrees
Description: <p>Latitude at the start of the event; north is positive. Added from the EPZT master file.</p>
http://lod.bco-dmo.org/id/dataset-parameter/650357.rdf
Name: EVENT_LON
Units: decimal degrees
Description: <p>Longitude at the start of the event; east is positive. Added from the EPZT master file.</p>
http://lod.bco-dmo.org/id/dataset-parameter/650358.rdf
Name: GEOTRC_SAMPNO
Units: unitless
Description: <p>Unique GEOTRACES sample number</p>
http://lod.bco-dmo.org/id/dataset-parameter/650359.rdf
Name: CASTNO
Units: unitless
Description: <p>Cast number; added from the EPZT master file.</p>
http://lod.bco-dmo.org/id/dataset-parameter/650360.rdf
Name: SAMPNO
Units: unitless
Description: <p>Sequential sample number within the cast (usually corresponds to bottle number); added from the EPZT master file.</p>
http://lod.bco-dmo.org/id/dataset-parameter/650361.rdf
Name: GEOTRC_INSTR
Units: unitless
Description: <p>Sampling instrument</p>
http://lod.bco-dmo.org/id/dataset-parameter/650362.rdf
Name: DEPTH
Units: meters
Description: <p>Depth; provided by the PI.</p>
http://lod.bco-dmo.org/id/dataset-parameter/650363.rdf
Name: Ra_228_D_CONC_PUMP
Units: disintegrations per minute (dpm) per 100 liters (dpm/100L)
Description: <p>Concentration of 228-Radium (dissolved).</p>
http://lod.bco-dmo.org/id/dataset-parameter/650364.rdf
Name: Ra_228_D_CONC_PUMP_FLAG
Units: unitless
Description: <p>Quality flag for Ra_228_D_CONC_PUMP. See Processing Description for quality flag definitions.</p>
http://lod.bco-dmo.org/id/dataset-parameter/650365.rdf
Name: Ra_228_D_CONC_PUMP_ERR
Units: disintegrations per minute (dpm) per 100 liters (dpm/100L)
Description: <p>Error for Ra_228_D_CONC_PUMP.</p>
http://lod.bco-dmo.org/id/dataset-parameter/650366.rdf
Name: Ra_226_D_CONC_PUMP
Units: disintegrations per minute (dpm) per 100 liters (dpm/100L)
Description: <p>Concentration of 226-Radium (dissolved).</p>
http://lod.bco-dmo.org/id/dataset-parameter/650367.rdf
Name: Ra_226_CONC_D_PUMP_FLAG
Units: unitless
Description: <p>Quality flag for Ra_226_D_CONC_PUMP. See Processing Description for quality flag definitions.</p>
http://lod.bco-dmo.org/id/dataset-parameter/650368.rdf
Name: Ra_226_CONC_D_PUMP_ERR
Units: disintegrations per minute (dpm) per 100 liters (dpm/100L)
Description: <p>Error for Ra_226_D_CONC_PUMP.</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
52945
https://datadocs.bco-dmo.org/file/1VVMoxnTn2g4m2/Radium_joined.csv
Radium_joined.csv
Primary data file for dataset ID 650340
download
https://osprey.bco-dmo.org/dataset/650340/data/download
download
onLine
dataset
<p>Radium was collected onto an manganese coated cartridge filtered at depth using an adapted McLane (WTS-LV). The pumps were programmed to filter 1500-2000L of seawater per deployment. Water (15-25 L) was also collected at the same depth using a 30L Niskin bottle; these samples were filtered (at &lt;1L/min) through a manganese coated acrylic fiber and used calculate radium extraction efficiency of the pumped samples. The cartridges were rinsed with radium-free fresh water and excess moisture was removed using compressed air. Samples were analyzed three times using an Alpha delayed coincidence counter (RaDeCC) for 223Ra, 224Ra, 228Th, and 227Ac. The cartridge and fiber media were ashed at 820 degrees C and measured on gamma detectors for long lived radium (226Ra, 228Ra) and thorium isotopes. 226Ra was determined via alpha scintillation counting of the Niskin bottle Mn fiber samples.</p>
Specified by the Principal Investigator(s)
<p>The data were corrected for decay from the time of sampling. 223Ra was corrected for 227Ac (ex223Ra), 224Ra was corrected for 228Th (ex224Ra). The radium activity of the water samples (cartridges) were corrected from the measured radium on acrylic fiber (&lt;1L/min) using the emanation technique.</p>
<p>Information on data quality and intercalibration can be found in the <a href="http://dmoserv3.whoi.edu/data_docs/GEOTRACES/EPZT/Charette/IDP2017_Pacific_GEOTRACES_Charette_final.pdf" target="_blank">intercalibration report (PDF)</a>.</p>
<p><strong>Quality flag definitions:</strong><br />
1 = 228Radium measured in Modane (France),<br />
2 = Radium efficiency based on Silicate/radium correlation,<br />
3 = Below detection,<br />
4 = vial broken, sample lost,<br />
5 = efficiency can not be determined,<br />
6 = 228Radium measured through 228Thorium (gamma spectroscopy),<br />
7 = 228Radium measured through 228Actinium (gamma spectroscopy),<br />
8 = Pump Failure, no sample collected,<br />
9 = Interpolated value based on neighboring data points,<br />
10 = based on the Barium / Radium relationship<br />
11 = Questionable quality.</p>
<p>&nbsp;</p>
<p><strong>BCO-DMO Processing:</strong><br />
- converted date format to YYYYmmdd;<br />
- modified parameter names to conform with BCO-DMO and GEOTRACES naming conventions.</p>
<p><strong>Additional GEOTRACES Processing by BCO-DMO:</strong><br />
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:<br />
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>This added information will facilitate subsequent analysis and inter-comparison of the datasets.</p>
<p>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>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>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>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>
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
McLane (WTS-LV)
McLane (WTS-LV)
PI Supplied Instrument Name: McLane (WTS-LV) Instrument Name: McLane Large Volume Pumping System WTS-LV Instrument Short Name:WTS-LV Instrument Description: The WTS-LV is a Water Transfer System (WTS) Large Volume (LV) pumping instrument designed and manufactured by McLane Research Labs (Falmouth, MA, USA). It is a large-volume, single-event sampler that collects suspended and dissolved particulate samples in situ.
Ambient water is drawn through a modular filter holder onto a 142-millimeter (mm) membrane without passing through the pump. The standard two-tier filter holder provides prefiltering and size fractioning. Collection targets include chlorophyll maximum, particulate trace metals, and phytoplankton. It features different flow rates and filter porosity to support a range of specimen collection. Sampling can be programmed to start at a scheduled time or begin with a countdown delay. It also features a dynamic pump speed algorithm that adjusts flow to protect the sample as material accumulates on the filter. Several pump options range from 0.5 to 30 liters per minute, with a max volume of 2,500 to 36,000 liters depending on the pump and battery pack used. The standard model is depth rated to 5,500 meters, with a deeper 7,000-meter option available. The operating temperature is -4 to 35 degrees Celsius.
The WTS-LV is available in four different configurations: Standard, Upright, Bore Hole, and Dual Filter Sampler. The high-capacity upright WTS-LV model provides three times the battery life of the standard model. The Bore-Hole WTS-LV is designed to fit through a narrow opening such as a 30-centimeter borehole. The dual filter WTS-LV features two vertical intake 142 mm filter holders to allow simultaneous filtering using two different porosities.
Alpha delayed coincidence counter (RaDeCC)
Alpha delayed coincidence counter (RaDeCC)
PI Supplied Instrument Name: Alpha delayed coincidence counter (RaDeCC) Instrument Name: Radium Delayed Coincidence Counter Instrument Short Name:RaDeCC Instrument Description: The RaDeCC is an alpha scintillation counter that distinguishes decay events of short-lived radium daughter products based on their contrasting half-lives. This system was pioneered by Giffin et al. (1963) and adapted for radium measurements by Moore and Arnold (1996).
References:
Giffin, C., A. Kaufman, W.S. Broecker (1963). Delayed coincidence counter for the assay of actinon and thoron. J. Geophys. Res., 68, pp. 1749-1757.
Moore, W.S., R. Arnold (1996). Measurement of 223Ra and 224Ra in coastal waters using a delayed coincidence counter. J. Geophys. Res., 101 (1996), pp. 1321-1329.
Charette, Matthew A.; Dulaiova, Henrieta; Gonneea, Meagan E.; Henderson, Paul B.; Moore, Willard S.; Scholten, Jan C.; Pham, M. K. (2012). GEOTRACES radium isotopes interlaboratory comparison experiment. Limnology and Oceanography - Methods, vol 10, pg 451.
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