http://lod.bco-dmo.org/id/dataset/3086
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
2010-06-16
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Thorium isotope data summaries from R/V Yuzhmorgeologiya, RVIB Nathaniel B. Palmer AMLR2006-Leg1, NBP0606 in the Southern Ocean from January to August 2006 (Ant2006 project, BWZ project)
2009-03-11
publication
2009-03-11
revision
BCO-DMO Linked Data URI
2009-03-11
creation
http://lod.bco-dmo.org/id/dataset/3086
Matthew A. Charette
Woods Hole Oceanographic Institution
principalInvestigator
Dr Henrieta Dulaiova
University of Hawaiʻi at Mānoa
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., Dulaiova, H. (2009) Thorium isotope data summaries from R/V Yuzhmorgeologiya, RVIB Nathaniel B. Palmer AMLR2006-Leg1, NBP0606 in the Southern Ocean from January to August 2006 (Ant2006 project, BWZ project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 11 March 2009) Version Date 2009-03-11 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/3086 [access date]
Thorium isotope data summaries Dataset Description: <h3 class="line_section_1"><b>Thorium isotope data summaries from AMLR and NBP cruises to the Antarctic in 2006</b></h3>
<p>Particulate organic Carbon (POC) flux was determined through measuring Thorium (234Th) reported in dpm/kg .<br />
&nbsp;</p>
<h3 class="line_section_1"><b>Cruises</b></h3>
<p><b>AMLR (Antarctic Marine Living Resources) R/V Yuzhmorgeologiya Jan2006:</b><br />
The research program was focused in the southern Drake Passage<br />
along the Shackelton Shelf located near the Bransfield Strait.<br />
Samples were obtained from the R/V Yuzhmorgeologiya and inflatables<br />
that were taken to island locations.<br />
<i>Lat/Lon Bounding Box</i><br />
-62.2538Lat, -62.9966Lon<br />
-63.2335Lat, -59.0332Lon<br />
-59.9964Lat, -55.7612Lon<br />
-61.4995Lat, -53.9996Lon<br />
<br />
<b>NBP (Nathaniel B. Palmer) R/V Nathaniel B. Palmer July2006:</b><br />
The research was conducted in the same region of the Drake Passage as the AMLR cruise.<br />
Samples were obtained aboard the R/V Nathaniel B. Palmer<br />
<i>Lat/Lon bounding box</i><br />
-60.4991Lat, -58.5613Lon<br />
-62.3599Lat, -58.0392Lon<br />
-60.2783Lat, -57.4509Lon<br />
-61.2683Lat, -54.2852Lon<br />
&nbsp;</p>
<h3 class="text">Associated Publications</h3>
<p class="text">Brzezinski, M.A., Nelson, D.M., Franck, V.M. and Sigmon, D.E., 2001. &quot;Silicon dynamics within an intense open-ocean diatom bloom in the pacific sector of the southern ocean.&quot; Deep-Sea Research Part II 48, pp. 3997-4018<br />
<br />
Michiel Rutgers van der Loeff, Manmohan M. Sarin, Mark Baskaran, Claudia Benitez-Nelson, Ken O. Buesseler, Matt Charette, Minhan Dai, &Ouml;rjan Gustafsson, Pere Masque, Paul J. Morris, Kent Orlandini, Alessia Rodriguez y Baena, Nicolas Savoye, Sabine Schmidt, Robert Turnewitsch, Ingrid V&ouml;ge, James T. Waples. &quot;A review of present techniques and methodological advances in analyzing 234Th in aquatic systems&quot; Marine Chemistry, Volume 100, Issues 3-4, 1 August 2006, Pages 190-212<br />
<br />
Pike, S.M., K.O. Buesseler, J. Andrews and N. Savoye, 2005. &quot;Quantification of 234Th recovery in small volume sea water samples by inductively coupled plasma mass spectrometry.&quot; (PDF) Journal of Radioanalytical and Nuclear Chemistry, 263(2): 355-360.<br />
<br />
Willard S. Moore and Ralph Arnold (1996). &quot;Measurement of 223Ra and 224Ra in coastal waters using a delayed coincidence counter.&quot; Journal of Geophysical Research, vol. 101, no. c1, pages 1321-1329, January 15, 1996.</p> Methods and Sampling: <h3 class="text">Sampling and Analytical Methodology</h3>
<p>Particle sinking rates were determined using the 4 liter measurement of 234Th (Pike et al., 2005). Samples were collected from hydrocasts from a shipboard CTD. The unfiltered 4-liter samples were immediately acidified to pH ~1.5 using concentrated Nitric acid. Samples were shaken vigorously and 230Th added as a yield monitor. The samples were shaken again and allowed to equilibrate for 8 hours. Concentrated NH4OH was subsequently added to each sample to adjust the pH to 8. Extraction of thorium from seawater was then accomplished by co-precipitation via a MnO2 precipitate onto a 25-mm-diameter QMA filter. The filtered samples were air dried and counted on a RISO beta detector (Rutgers van der Loeff et al., 2006). All samples were counted for at least 24 hours or until the counting error was &lt; 3%. Samples were recounted after &gt;150 days (~6 half lives) to determine the sample background. Detector calibration was confirmed with 3000m deep water sample.<br />
<br />
Particulate carbon was collected through a McLane WTS-LV in-situ pump and filtered through a 142mm GFF filter. 22mm subsamples were collected, dried and transported back to the WHOI laboratory for CHN analysis on the Flash EA1112. The samples were pelletized in ultra clean tin capsules, combusted at 900oC, separated in a gas chromatographic column, and measured through a thermal conductivity detector. The CHN analyzer was calibrated by using an acetanilide standard. A second subsample was taken and analyzed for biogenic silica (Brzezinski et al 2001). Sodium Hydroxide was added to the filter and heated to 95oC for 45minutes. It was placed on ice and neutralized with hydrochloric acid. After centrifuging, the supernatant is then analyzed for silicate on a Lachat Quickchem 8000.<br />
&nbsp;</p>
Funding provided by NSF Antarctic Sciences (NSF ANT) Award Number: ANT-0443869 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=0443869
completed
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
Dr Henrieta Dulaiova
University of Hawaiʻi at Mānoa
(808) 956-0720
Department of Geology & Geophysics SOEST, University of Hawaii
Honolulu
HI
96822
USA
hdulaiov@hawaii.edu
pointOfContact
asNeeded
Dataset Version: 11 March 2009
Unknown
Cruise_ID
Sample_ID
Station_ID
date
time
lat
lon
depth
cast
bottle
Total_Thorium
Thorium_net_err
POC_gt54_micron
PON_gt54_micron
POC_1_to_54_micron
PON_1_to_54_micron
BioAvail_Silicate
Conductivity, Temperature, Depth
Large Volume Pumping System -WTS-LV
Pump5
theme
None, User defined
Cruise identfier
sample identification
station
date
time of day
latitude
longitude
depth
cast
bottle
thorium-234 total concentration
No BCO-DMO term
particulate organic Carbon (POC)
particulate organic nitrogen
Silicate, Si(OH)4, silicic acid
featureType
BCO-DMO Standard Parameters
CTD - profiler
McLane Large Volume Pumping System WTS-LV
Pump - Surface Underway Ship Intake
instrument
BCO-DMO Standard Instruments
AMLR2006-Leg1
NBP0606
service
Deployment Activity
Antarctica, southern Drake Passage, Shackelton Shelf, Bransfield Strait, Elephant Island
Antarctica, Drake Passage, Scotia Sea, Bransfield Strait
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.
Plankton Community Structure and Iron Distribution in the Southern Drake Passage and Scotia Sea
https://osprey.bco-dmo.org/project/2069
Plankton Community Structure and Iron Distribution in the Southern Drake Passage and Scotia Sea
<p><strong>Collaborative Research: Plankton Community Structure and Iron Distribution in the<br />
Southern Drake Passage and Scotia Sea</strong></p>
<p>The Shackleton Fracture Zone (SFZ) in Drake Passage of the Southern Ocean defines a<br />
boundary between low and high phytoplankton waters. Low chlorophyll water flowing<br />
through the southern Drake Passage emerges as high chlorophyll water to the east,<br />
and recent evidence indicates that the Southern Antarctic Circumpolar Current Front<br />
(SACCF) is steered south of the SFZ onto the Antarctic Peninsula shelf where mixing<br />
between the water types occurs. The mixed water is then advected off-shelf with<br />
elevatediron and phytoplankton biomass.</p>
<p>The SFZ is therefore an ideal natural laboratory to improve the understanding of<br />
plankton community responses to natural iron fertilization, and how these processes<br />
influence export of organic carbon to the ocean interior. The bathymetry of the region<br />
is hypothesized to influence mesoscale circulation and transport of iron, leading to<br />
the observed patterns in phytoplankton biomass.</p>
<p>The position of the Antarctic Circumpolar Current (ACC) is further hypothesized to<br />
influence the magnitude of the flow of ACC water onto the peninsula shelf, mediating<br />
the amount of iron transported into the Scotia Sea. To address these hypotheses, a<br />
research cruise will be conducted near the SFZ and to the east in the southern Scotia<br />
Sea. A mesoscale station grid for vertical profiles, water sampling, and bottle incubation<br />
enrichment experiments will complement rapid surface surveys of chemical, plankton, and<br />
hydrographic properties. Distributions of manganese, aluminum and radium isotopes will<br />
be determined to trace iron sources and estimate mixing rates.</p>
<p>Phytoplankton and bacterial physiological states (including responses to iron enrichment)<br />
and the structure of the plankton communities will be studied. The primary goal is to<br />
better understand how plankton productivity, community structure and export production<br />
in the Southern Ocean are affected by the coupling between bathymetry, mesoscale circulation,<br />
and distributions of limiting nutrients. The proposed work represents an interdisciplinary<br />
approach to address the fundamental physical, chemical and biological processes that<br />
contribute to the abrupt transition in chl-a which occurs near the SFZ. Given recent<br />
indications that the Southern Ocean is warming, it is important to advance the understanding<br />
of conditions that regulate the present ecosystem structure in order to predict the effects<br />
of climate variability. This project will promote training and learning across a broad<br />
spectrum of groups. Funds are included to support postdocs, graduate students, and<br />
undergraduates. In addition, this project will contribute to the development of content<br />
for the Polar Science Station website, which has been a resource since 2001 for instructors<br />
and students in adult education, home schooling, tribal schools, corrections education,<br />
family literacy programs, and the general public.</p>
<p> </p>
<p> </p>
<h3><strong>Radium and Thorium isotope data summaries from AMLR and NBP cruises to the Antarctic in 2006</strong></h3>
<p>Naturally occurring radium isotopes (224Ra, 226Ra, 228Ra) were used in determining<br />
lateral mixing processes which are reported in dpm/m3.</p>
<p>Particulate organic Carbon (POC) flux was determined through measuring Thorium (234Th) reported in dpm/kg.</p>
<p><strong>Cruises</strong></p>
<p><strong>AMLR (Antarctic Marine Living Resources) R/V Yuzhmorgeologiya Jan/2006:</strong><br />
The research program was focused in the southern Drake Passage<br />
along the Shackelton Shelf located near the Bransfield Strait.<br />
Samples were obtained from the R/V Yuzhmorgeologiya and inflatables<br />
that were taken to island locations.<br />
<em>Lat/Lon Bounding Box</em><br />
-62.2538Lat, -62.9966Lon<br />
-63.2335Lat, -59.0332Lon<br />
-59.9964Lat, -55.7612Lon<br />
-61.4995Lat, -53.9996Lon</p>
<p><strong>NBP (Nathaniel B. Palmer) R/V Nathaniel B. Palmer July/2006:</strong><br />
The research was conducted in the same region of the Drake Passage as the AMLR cruise.<br />
Samples were obtained aboard the R/V Nathaniel B. Palmer<br />
<em>Lat/Lon bounding box</em><br />
-60.4991Lat, -58.5613Lon<br />
-62.3599Lat, -58.0392Lon<br />
-60.2783Lat, -57.4509Lon<br />
-61.2683Lat, -54.2852Lon</p>
<p><strong>NASA GCMD Link:</strong> <a href="http://gcmd.nasa.gov/getdif.htm?AMLR2006" target="_blank"">NASA GCMD</a></p>
Ant2006
largerWorkCitation
project
Blue Water Zone
https://osprey.bco-dmo.org/project/2145
Blue Water Zone
<p><strong>NSF Proposal Title: Collaborative Research: Plankton Community Structure and Iron Distribution in the Southern Drake Passage and Scotia Sea</strong></p>
<p>The Shackleton Fracture Zone (SFZ) in Drake Passage of the Southern Ocean defines a boundary between low and high phytoplankton waters. Low chlorophyll water flowing through the southern Drake Passage emerges as high chlorophyll water to the east, and recent evidence indicates that the Southern Antarctic Circumpolar Current Front (SACCF) is steered south of the SFZ onto the Antarctic Peninsula shelf where mixing between the water types occurs. The mixed water is then advected off-shelf with elevated iron and phytoplankton biomass. The SFZ is therefore an ideal natural laboratory to improve the understanding of plankton community responses to natural iron fertilization, and how these processes influence export of organic carbon to the ocean interior. The bathymetry of the region is hypothesized to influence mesoscale circulation and transport of iron, leading to the observed patterns in phytoplankton biomass. The position of the Antarctic Circumpolar Current (ACC) is further hypothesized to influence the magnitude of the flow of ACC water onto the peninsula shelf, mediating the amount of iron transported into the Scotia Sea. To address these hypotheses, a research cruise will be conducted near the SFZ and to the east in the southern Scotia Sea. A mesoscale station grid for vertical profiles, water sampling, and bottle incubation enrichment experiments will complement rapid surface surveys of chemical, plankton, and hydrographic properties. Distributions of manganese, aluminum and radium isotopes will be determined to trace iron sources and estimate mixing rates. Phytoplankton and bacterial physiological states (including responses to iron enrichment) and the structure of the plankton communities will be studied. The primary goal is to better understand how plankton productivity, community structure and export production in the Southern Ocean are affected by the coupling between bathymetry, mesoscale circulation, and distributions of limiting nutrients. The proposed work represents an interdisciplinary approach to address the fundamental physical, chemical and biological processes that contribute to the abrupt transition in chl-a which occurs near the SFZ. Given recent indications that the Southern Ocean is warming, it is important to advance the understanding of conditions that regulate the present ecosystem structure in order to predict the effects of climate variability. This project will promote training and learning across a broad spectrum of groups. Funds are included to support postdocs, graduate students, and undergraduates. In addition, this project will contribute to the development of content for the Polar Science Station website, which has been a resource since 2001 for instructors and students in adult education, home schooling, tribal schools, corrections education, family literacy programs, and the general public.</p>
<p>PUBLICATIONS PRODUCED AS A RESULT OF THIS RESEARCH</p>
<p>Hewes, C. D., Reiss, C.S., .Kahru, M. , Mitchell, B.G. , and Holm-Hansen, O.. "Control of phytoplankton biomass by dilution and mixed layer depth in the western Weddell-Scotia Confluence (WSC)," Marine Ecology Progress Series, v.366, 2008, p. 15.</p>
<p>Hiscock, M. , Lance, V. , Apprill, A., Bidigare, R , Mitchell, B., Smith Jr. W., Barber, R.. "Photosynthetic maximum quantum yield increases are an essential component of the Southern Ocean phytoplankton response to iron," Proceedings of the National Academy of Sciences, v.105(2), 2008, p. 4775.</p>
<p>Holm-Hansen, O., Kahru, M., Hewes, C.. "Deep chlorophyll a maxima (DCMs) in pelagic Antarctic waters. II. Relation to bathymetric features and dissolved iron concentrations," Marine Ecology-Progress Series, v.297, 2005, p. 71.</p>
<p>Hopkinson, B., Mitchell, B. G., Reynolds, R. A., Wang, H., Selph, K., Measures, C., Hewes, C., Holm-Hansen, O., Barbeau, K.. "Iron limitation Across Chlorophyll Gradients in the Southern Drake Passage: Phytoplankton Responses to Iron Addition and Photosynthetic Indicators of Iron Stress," Limnology and Oceanography, 2007, p. 2540.</p>
<p>Hopkinson, B., Mitchell, B. G., Reynolds, R. A., Wang, H., Selph, K., Measures, C., Hewes, C., Holm-Hansen, O., Barbeau, K.. "Iron limitation Across Chlorophyll Gradients in the Southern Drake Passage: Phytoplankton Responses to Iron Addition and Photosynthetic Indicators of Iron Stress," Limnology and Oceanography, v.52, 2007, p. 2540.</p>
<p>Kahru, M., Mitchell, B. G., Gille, S. T., Hewes, C. D. and Holm-Hansen, O.. "Eddies enhance biological production in the Weddell-Scotia Confluence of the Southern Ocean," Geophys. Res. Let., 34,, v.24, 2007, p. L14603.</p>
BWZ
largerWorkCitation
project
eng; USA
oceans
Antarctica, southern Drake Passage, Shackelton Shelf, Bransfield Strait, Elephant Island; Antarctica, Drake Passage, Scotia Sea, Bransfield Strait
2009-03-11
From projects that focused on the following 2 locations: 1. Antarctica, Southern Drake Passage and Scotia Sea 2. Antarctica, Drake Passage, N: -52.6061, S: -65.1877 , E: -52.965, W: -68.325
0
BCO-DMO catalogue of parameters from Thorium isotope data summaries from R/V Yuzhmorgeologiya, RVIB Nathaniel B. Palmer AMLR2006-Leg1, NBP0606 in the Southern Ocean from January to August 2006 (Ant2006 project, BWZ 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/16757.rdf
Name: Cruise_ID
Units: text
Description: <p>Antarctica 2006 Cruise Id</p>
http://lod.bco-dmo.org/id/dataset-parameter/16758.rdf
Name: Sample_ID
Units: text
Description: <p>Antarctica 2006 Sample Id</p>
http://lod.bco-dmo.org/id/dataset-parameter/16759.rdf
Name: Station_ID
Units: text
Description: <p>Antarctica 2006 Station Id</p>
http://lod.bco-dmo.org/id/dataset-parameter/16760.rdf
Name: date
Units: YYYYMMDD
Description: <p>Date of sample collection (GMT)</p>
http://lod.bco-dmo.org/id/dataset-parameter/16761.rdf
Name: time
Units: HHMM
Description: <p>Time of sample collection (GMT)</p>
http://lod.bco-dmo.org/id/dataset-parameter/16762.rdf
Name: lat
Units: decimal degrees
Description: <p>Latitude position of sample. Decimal degs (South is negative).</p>
http://lod.bco-dmo.org/id/dataset-parameter/16763.rdf
Name: lon
Units: decimal degrees
Description: <p>Longitude position of sample. Decimal degs (West is negative)</p>
http://lod.bco-dmo.org/id/dataset-parameter/16764.rdf
Name: depth
Units: meters
Description: <p>Depth of sample</p>
http://lod.bco-dmo.org/id/dataset-parameter/16765.rdf
Name: cast
Units: integer
Description: <p>CTD cast number</p>
http://lod.bco-dmo.org/id/dataset-parameter/16766.rdf
Name: bottle
Units: integer
Description: <p>CTD bottle number</p>
http://lod.bco-dmo.org/id/dataset-parameter/16767.rdf
Name: Total_Thorium
Units: dpm/kg
Description: <p>Total thorium dpm at collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/16768.rdf
Name: Thorium_net_err
Units: +/- dpm
Description: <p>Total_Thorium net err</p>
http://lod.bco-dmo.org/id/dataset-parameter/16769.rdf
Name: POC_gt54_micron
Units: uM/Liter
Description: <p>Particulate Organic Carbon (>54microns)</p>
http://lod.bco-dmo.org/id/dataset-parameter/16770.rdf
Name: PON_gt54_micron
Units: uM/Liter
Description: <p>Particulate Organic Nitrogen (>54microns)</p>
http://lod.bco-dmo.org/id/dataset-parameter/16771.rdf
Name: POC_1_to_54_micron
Units: uM/Liter
Description: <p>Particulate Organic Carbon (1-54microns)</p>
http://lod.bco-dmo.org/id/dataset-parameter/16772.rdf
Name: PON_1_to_54_micron
Units: uM/Liter
Description: <p>Particulate Organic Nitrogen (1-54microns)</p>
http://lod.bco-dmo.org/id/dataset-parameter/16773.rdf
Name: BioAvail_Silicate
Units: uM/Liter
Description: <p>Biological Available Silicate</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
44007
https://datadocs.bco-dmo.org/file/nGGlAyMIGgNXEO/Thorium_Summary.csv
Thorium_Summary.csv
Primary data file for dataset ID 3086
download
https://osprey.bco-dmo.org/dataset/3086/data/download
download
onLine
dataset
<h3 class="text">Sampling and Analytical Methodology</h3>
<p>Particle sinking rates were determined using the 4 liter measurement of 234Th (Pike et al., 2005). Samples were collected from hydrocasts from a shipboard CTD. The unfiltered 4-liter samples were immediately acidified to pH ~1.5 using concentrated Nitric acid. Samples were shaken vigorously and 230Th added as a yield monitor. The samples were shaken again and allowed to equilibrate for 8 hours. Concentrated NH4OH was subsequently added to each sample to adjust the pH to 8. Extraction of thorium from seawater was then accomplished by co-precipitation via a MnO2 precipitate onto a 25-mm-diameter QMA filter. The filtered samples were air dried and counted on a RISO beta detector (Rutgers van der Loeff et al., 2006). All samples were counted for at least 24 hours or until the counting error was &lt; 3%. Samples were recounted after &gt;150 days (~6 half lives) to determine the sample background. Detector calibration was confirmed with 3000m deep water sample.<br />
<br />
Particulate carbon was collected through a McLane WTS-LV in-situ pump and filtered through a 142mm GFF filter. 22mm subsamples were collected, dried and transported back to the WHOI laboratory for CHN analysis on the Flash EA1112. The samples were pelletized in ultra clean tin capsules, combusted at 900oC, separated in a gas chromatographic column, and measured through a thermal conductivity detector. The CHN analyzer was calibrated by using an acetanilide standard. A second subsample was taken and analyzed for biogenic silica (Brzezinski et al 2001). Sodium Hydroxide was added to the filter and heated to 95oC for 45minutes. It was placed on ice and neutralized with hydrochloric acid. After centrifuging, the supernatant is then analyzed for silicate on a Lachat Quickchem 8000.<br />
&nbsp;</p>
from Cruise: AMLR2006-Leg1 <h3 class="text">Sampling and Analytical Methodology</h3>
<p>Particle sinking rates were determined using the 4 liter measurement of 234Th (Pike et al., 2005). Samples were collected from hydrocasts from a shipboard CTD. The unfiltered 4-liter samples were immediately acidified to pH ~1.5 using concentrated Nitric acid. Samples were shaken vigorously and 230Th added as a yield monitor. The samples were shaken again and allowed to equilibrate for 8 hours. Concentrated NH4OH was subsequently added to each sample to adjust the pH to 8. Extraction of thorium from seawater was then accomplished by co-precipitation via a MnO2 precipitate onto a 25-mm-diameter QMA filter. The filtered samples were air dried and counted on a RISO beta detector (Rutgers van der Loeff et al., 2006). All samples were counted for at least 24 hours or until the counting error was < 3%. Samples were recounted after >150 days (~6 half
lives) to determine the sample background. Detector calibration was confirmed with 3000m deep water sample.<br><br>
Particulate carbon was collected through a McLane WTS-LV in-situ pump and filtered through a 142mm GFF filter. 22mm subsamples were collected, dried and transported back to the WHOI laboratory for CHN analysis on the Flash EA1112. The samples were pelletized in ultra clean tin capsules, combusted at 900oC, separated in a gas chromatographic column, and measured through a thermal conductivity detector. The CHN analyzer was calibrated by using an acetanilide standard. A second subsample was taken and analyzed for biogenic silica (Brzezinski et al 2001). Sodium Hydroxide was added to the filter and heated to 95oC for 45minutes. It was placed on ice and neutralized with hydrochloric acid. After centrifuging, the supernatant is then analyzed for silicate on a Lachat Quickchem 8000.<br><br>
from Cruise: NBP0606 <h3 class="text">Sampling and Analytical Methodology</h3>
<p>Particle sinking rates were determined using the 4 liter measurement of 234Th (Pike et al., 2005). Samples were collected from hydrocasts from a shipboard CTD. The unfiltered 4-liter samples were immediately acidified to pH ~1.5 using concentrated Nitric acid. Samples were shaken vigorously and 230Th added as a yield monitor. The samples were shaken again and allowed to equilibrate for 8 hours. Concentrated NH4OH was subsequently added to each sample to adjust the pH to 8. Extraction of thorium from seawater was then accomplished by co-precipitation via a MnO2 precipitate onto a 25-mm-diameter QMA filter. The filtered samples were air dried and counted on a RISO beta detector (Rutgers van der Loeff et al., 2006). All samples were counted for at least 24 hours or until the counting error was < 3%. Samples were recounted after >150 days (~6 half
lives) to determine the sample background. Detector calibration was confirmed with 3000m deep water sample.<br><br>
Particulate carbon was collected through a McLane WTS-LV in-situ pump and filtered through a 142mm GFF filter. 22mm subsamples were collected, dried and transported back to the WHOI laboratory for CHN analysis on the Flash EA1112. The samples were pelletized in ultra clean tin capsules, combusted at 900oC, separated in a gas chromatographic column, and measured through a thermal conductivity detector. The CHN analyzer was calibrated by using an acetanilide standard. A second subsample was taken and analyzed for biogenic silica (Brzezinski et al 2001). Sodium Hydroxide was added to the filter and heated to 95oC for 45minutes. It was placed on ice and neutralized with hydrochloric acid. After centrifuging, the supernatant is then analyzed for silicate on a Lachat Quickchem 8000.<br><br>
Specified by the Principal Investigator(s)
<h3 class="text">Data Processing</h3>
<p>CHN: Linear regression of standards is used to determine the carbon content of the sample<br />
<br />
Th: Thorium is measured using the Riso betacounters. Results published include removal ofsample background, detector efficiency correction, correction of radioactive decay, and chemistry efficiency through analysis of tracer (230Th).</p>
<h3 class="text">Modifications to original data made to conform to BCO-DMO database convention</h3>
<p class="text">Cruise_ID added<br />
Spaces in Sample_ID replaced with dashes for consistency with Radium summary data empty cells filled with &quot;nd&quot; (no data)<br />
Latitude/Longitude headers converted to lat/lon<br />
date reformatted to YYYYMMDD<br />
time reformatted to HHMM<br />
decimal data values padded to consistent decimal places<br />
spaces, minus signs, and &quot;&lt;&quot;'s replaced with underscores or text in misc data headers<br />
POC/PON used in place of Part Organic Carbon/Nitrogen in headers<br />
&quot;No Sample&quot; values replaced with &quot;nd&quot; in Sample_Ids FA-494, FA-495<br />
&quot;Surface&quot; values in Depth data replaced with &quot;1&quot;</p>
from Cruise: AMLR2006-Leg1 <h3 class="text">Data Processing</h3>
CHN: Linear regression of standards is used to determine the carbon content of the sample<br><br>
Th: Thorium is measured using the Riso betacounters. Results published include removal of<br>sample background, detector efficiency correction, correction of radioactive decay, and<br>chemistry efficiency through analysis of tracer (230Th).<br><br>
<h3 class="text">Modifications to original data made to conform to BCO-DMO database convention</h3>
<p class="text">Cruise_ID added<br />
Spaces in Sample_ID replaced with dashes for consistency with Radium summary data<br />
empty cells filled with "nd" (no data)<br />
Latitude/Longitude headers converted to lat/lon<br />
date reformatted to YYYYMMDD<br />
time reformatted to HHMM<br />
decimal data values padded to consistent decimal places<br />
spaces, minus signs, and "<"'s replaced with underscores or text in misc data headers<br />
POC/PON used in place of Part Organic Carbon/Nitrogen in headers<br>
"No Sample" values replaced with "nd" in Sample_Ids FA-494, FA-495<br>
"Surface" values in Depth data replaced with "1"<br></p>
from Cruise: NBP0606 <h3 class="text">Data Processing</h3>
CHN: Linear regression of standards is used to determine the carbon content of the sample<br><br>
Th: Thorium is measured using the Riso betacounters. Results published include removal of<br>sample background, detector efficiency correction, correction of radioactive decay, and<br>chemistry efficiency through analysis of tracer (230Th).<br><br>
<h3 class="text">Modifications to original data made to conform to BCO-DMO database convention</h3>
<p class="text">Cruise_ID added<br />
Spaces in Sample_ID replaced with dashes for consistency with Radium summary data<br />
empty cells filled with "nd" (no data)<br />
Latitude/Longitude headers converted to lat/lon<br />
date reformatted to YYYYMMDD<br />
time reformatted to HHMM<br />
decimal data values padded to consistent decimal places<br />
spaces, minus signs, and "<"'s replaced with underscores or text in misc data headers<br />
POC/PON used in place of Part Organic Carbon/Nitrogen in headers<br>
"No Sample" values replaced with "nd" in Sample_Ids FA-494, FA-495<br>
"Surface" values in Depth data replaced with "1"<br></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
Conductivity, Temperature, Depth
Conductivity, Temperature, Depth
PI Supplied Instrument Name: Conductivity, Temperature, Depth PI Supplied Instrument Description:Shipboard CTD Instrument Name: CTD - profiler Instrument Short Name: Instrument Description: The Conductivity, Temperature, Depth (CTD) unit is an integrated instrument package designed to measure the conductivity, temperature, and pressure (depth) of the water column. The instrument is lowered via cable through the water column. It permits scientists to observe the physical properties in real-time via a conducting cable, which is typically connected to a CTD to a deck unit and computer on a ship. The CTD is often configured with additional optional sensors including fluorometers, transmissometers and/or radiometers. It is often combined with a Rosette of water sampling bottles (e.g. Niskin, GO-FLO) for collecting discrete water samples during the cast.
This term applies to profiling CTDs. For fixed CTDs, see https://www.bco-dmo.org/instrument/869934. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/130/
Large Volume Pumping System -WTS-LV
Large Volume Pumping System -WTS-LV
PI Supplied Instrument Name: Large Volume Pumping System -WTS-LV PI Supplied Instrument Description:McLane WTS-LV Large Volume, High Accuracy, Oceanographic Sampling Pump 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.
Pump5
Pump5
PI Supplied Instrument Name: Pump5 PI Supplied Instrument Description:Ship's clean water intake pump (surface sample) Instrument Name: Pump - Surface Underway Ship Intake Instrument Short Name:Pump-Ship Intake Instrument Description: The 'Pump-underway ship intake' system indicates that samples are from the ship's clean water intake pump. This is essentially a surface water sample from a source of uncontaminated near-surface (commonly 3 to 7 m) seawater that can be pumped continuously to shipboard laboratories on research vessels. There is typically a temperature sensor near the intake (known as the hull temperature) to provide measurements that are as close as possible to the ambient water temperature. The flow from the supply is typically directed through continuously logged sensors such as a thermosalinograph and a fluorometer. Water samples are often collected from the underway supply that may also be referred to as the non-toxic supply. Ideally the data contributor has specified the depth in the ship's hull at which the pump is mounted. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/31/
Cruise: AMLR2006-Leg1
AMLR2006-Leg1
R/V Yuzhmorgeologiya
vessel
AMLR2006-Leg1
Adam Jenkins
National Oceanic and Atmospheric Administration - Southwest Fisheries Science Center
Cruise: NBP0606
NBP0606
Community Standard Description
International Council for the Exploration of the Sea
RVIB Nathaniel B. Palmer
vessel
NBP0606
B. Gregory Mitchell
University of California-San Diego Scripps
R/V Yuzhmorgeologiya
vessel