http://lod.bco-dmo.org/id/dataset/516062
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
2014-05-28
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Water column Th-234 activity determined using a 4-L technique from samples collected on R/V Melville cruise MV1008 in the Costa Rica Dome in 2010 (CRD FLUZiE project)
2014-05-28
publication
2014-05-28
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2019-12-11
publication
https://doi.org/10.1575/1912/bco-dmo.516062.1
Michael R. Landry
University of California-San Diego Scripps
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: Landry, M. (2014) Water column Th-234 activity determined using a 4-L technique from samples collected on R/V Melville cruise MV1008 in the Costa Rica Dome in 2010 (CRD FLUZiE project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2014-05-28 [if applicable, indicate subset used]. doi:10.1575/1912/bco-dmo.516062.1 [access date]
Water column Th-234 activity determined using a 4-L technique. Dataset Description: <p>Water column Thorium-234 and Uranium-238 measured on the MV1008 cruise in the Costa Rica Dome (CRD) region of the Eastern Tropical Pacific Ocean.</p> Methods and Sampling: <p>4-L samples for analysis of water column <sup>234</sup>Th concentrations were typically taken at 12 depths spanning the upper 150 m on two casts per experimental cycle. On two cycles in the core of the CRD, an additional set of 8 samples was taken to assess <sup>234</sup>Th deficiency down to 500-m depth. Samples were analyzed by standard small volume procedures (Benitez-Nelson et al. 2001, Buesseler et al. 2001, Pike et al. 2005). Immediately after collection, samples were acidified to a pH &lt; 2 with concentrated HNO<sub>3</sub>, spiked with 1 mL <sup>230</sup>Th tracer (0.17 Bq mL<sup>-1</sup>), shaken vigorously, and allowed to equilibrate for 4-9 hours. Samples were then basified to a pH of 8-9 with NH<sub>4</sub>OH. 100 uL each of KMnO<sub>4</sub> (7.5 g L<sup>-1</sup>) and MnCl<sub>2</sub> (33 g L<sup>-1</sup>) were added and samples were shaken then allowed to sit for &gt;8 hours as Th co-precipitated with manganese oxide. Samples were then filtered at high pressure onto a quartz microfiber (QMA) filter, dried in a drying oven, and mounted into RISO sample holders for beta counting.</p>
<p>Samples were beta counted at the University of South Carolina on a RISO low-level beta multi-counter within two months of the collection date. After an additional 8 months, samples were recounted to determine background beta emissions. Detector efficiency was calibrated using four samples taken from 2000-m depth (in water columns exceeding 3000-m depth), which were assumed to be at equilibrium with respect to <sup>234</sup>Th and <sup>238</sup>U. After background counts yield analyses were conducted as follows. Manganese oxide precipitate was dissolved from filters in 10 mL 8M HNO<sub>3</sub>/10% H<sub>2</sub>O<sub>2</sub>. 1 mL of <sup>229</sup>Th (1.66 Bq g<sup>-1</sup>) tracer was then added gravimetrically, and the sample was sonicated for 20 minutes and allowed to sit for &gt;6 hours. An aliquot of this solution was then filtered through a 0.1-mm syringe filter and diluted with 2.2M HNO<sub>3</sub>/1%HF for mass spec analysis of the <sup>229:230</sup>Th tracer ratio at the Woods Hole Oceanographic Institution Analytical Facility.</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-0826626 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=0826626
completed
Michael R. Landry
University of California-San Diego Scripps
858-534-4702
9500 Gilman Drive Mail Code: 0227
La Jolla
CA
92093-0227
USA
mlandry@ucsd.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
event
cast
niskin
cycle
sample
lat
lon
depth
sal
density
U238_activity
Th234_activity
uncertainty
ISO_DateTime_UTC
Mass Spec
RISO low-level beta multi-counter
theme
None, User defined
event
cast
Niskin bottle number
No BCO-DMO term
sample identification
latitude
longitude
depth
salinity
density
thorium-234 activity
ISO_DateTime_UTC
featureType
BCO-DMO Standard Parameters
Mass Spectrometer
Riso Laboratory Anti-coincidence Beta Counter
instrument
BCO-DMO Standard Instruments
MV1008
service
Deployment Activity
Costa Rica Dome
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.
Integrated Marine Biogeochemistry and Ecosystem Research -US
http://www.imber.info/
Integrated Marine Biogeochemistry and Ecosystem Research -US
The BCO-DMO database includes data from IMBER endorsed projects lead by US funded investigators. There is no dedicated US IMBER project or data management office. Those functions are provided by US-OCB and BCO-DMO respectively.
The information in this program description pertains to the Internationally coordinated IMBER research program. The projects contributing data to the BCO-DMO database are those funded by US NSF only. The full IMBER data catalog is hosted at the Global Change Master Directory (GCMD).
IMBER Data Portal: The IMBER project has chosen to create a metadata portal hosted by the NASA's Global Change Master Directory (GCMD). The GCMD IMBER data catalog provides an overview of all IMBER endorsed and related projects and links to datasets, and can be found at URL http://gcmd.nasa.gov/portals/imber/.
IMBER research will seek to identify the mechanisms by which marine life influences marine biogeochemical cycles, and how these, in turn, influence marine ecosystems. Central to the IMBER goal is the development of a predictive understanding of how marine biogeochemical cycles and ecosystems respond to complex forcings, such as large-scale climatic variations, changing physical dynamics, carbon cycle chemistry and nutrient fluxes, and the impacts of marine harvesting. Changes in marine biogeochemical cycles and ecosystems due to global change will also have consequences for the broader Earth System. An even greater challenge will be drawing together the natural and social science communities to study some of the key impacts and feedbacks between the marine and human systems.
To address the IMBER goal, four scientific themes, each including several issues, have been identified for the IMBER project: Theme 1 - Interactions between Biogeochemical Cycles and Marine Food Webs; Theme 2 - Sensitivity to Global Change: How will key marine biogeochemical cycles, ecosystems and their interactions, respond to global change?; Theme 3 - Feedback to the Earth System: What are the roles of the ocean biogeochemistry and ecosystems in regulating climate?; and Theme 4 - Responses of Society: What are the relationships between marine biogeochemical cycles, ecosystems, and the human system?
IMBER-US
largerWorkCitation
program
Ocean Carbon and Biogeochemistry
http://us-ocb.org/
Ocean Carbon and Biogeochemistry
The Ocean Carbon and Biogeochemistry (OCB) program focuses on the ocean's role as a component of the global Earth system, bringing together research in geochemistry, ocean physics, and ecology that inform on and advance our understanding of ocean biogeochemistry. The overall program goals are to promote, plan, and coordinate collaborative, multidisciplinary research opportunities within the U.S. research community and with international partners. Important OCB-related activities currently include: the Ocean Carbon and Climate Change (OCCC) and the North American Carbon Program (NACP); U.S. contributions to IMBER, SOLAS, CARBOOCEAN; and numerous U.S. single-investigator and medium-size research projects funded by U.S. federal agencies including NASA, NOAA, and NSF.
The scientific mission of OCB is to study the evolving role of the ocean in the global carbon cycle, in the face of environmental variability and change through studies of marine biogeochemical cycles and associated ecosystems.
The overarching OCB science themes include improved understanding and prediction of: 1) oceanic uptake and release of atmospheric CO2 and other greenhouse gases and 2) environmental sensitivities of biogeochemical cycles, marine ecosystems, and interactions between the two.
The OCB Research Priorities (updated January 2012) include: ocean acidification; terrestrial/coastal carbon fluxes and exchanges; climate sensitivities of and change in ecosystem structure and associated impacts on biogeochemical cycles; mesopelagic ecological and biogeochemical interactions; benthic-pelagic feedbacks on biogeochemical cycles; ocean carbon uptake and storage; and expanding low-oxygen conditions in the coastal and open oceans.
OCB
largerWorkCitation
program
Costa Rica Dome FLUx and Zinc Experiments
https://osprey.bco-dmo.org/project/515387
Costa Rica Dome FLUx and Zinc Experiments
<p>Research was aimed at improved understanding of plankton dynamics, carbon and nutrient fluxes, and potential trace element limitation in the Costa Rica Dome region of the eastern tropical Pacific. The specific science objectives of the 2010 R/V Melville cruise (MV1008) were:<br />
1) to assess grazing and trace metal/nutrient controls on primary production and phytoplankton standing stocks;<br />
2) to quantify carbon and elemental fluxes and export rates from the euphotic zone; and<br />
3) to measure microbial population, processes, stable isotope abundances associated with the OMZ and nitrite maxima.</p>
<p>Additional information about MV1008 can be found in the <a href="http://dmoserv3.whoi.edu/data_docs/CRD_FLUZiE/CRUISE_REPORT_Melville1008.pdf" target="_blank">cruise report</a> (PDF).</p>
<p><strong>NOTE: </strong>The original proposal and award abstract are not relevant. The project was originally funded by NSF as experimental tests of phytoplankton controls in the Arabian Sea. Piracy concerns in the region led to the cancellation of the research cruise in 2009, and a Change of Scope request was approved to focus the project on related issues in the Costa Rica Dome (CRD).</p>
<p>Though this project is not formally affiliated with any large program, it aligns with IMBER's emphasis on community ecology and biogeochemistry, and the OCB focus on carbon-based measurements of production, grazing and export processes.</p>
CRD FLUZiE
largerWorkCitation
project
eng; USA
oceans
Costa Rica Dome
-92.92
-86.76
8.37
10.33
2010-06-27
2010-07-23
Costa Rica Dome, Eastern Tropical Pacific Ocean
0
BCO-DMO catalogue of parameters from Water column Th-234 activity determined using a 4-L technique from samples collected on R/V Melville cruise MV1008 in the Costa Rica Dome in 2010 (CRD FLUZiE 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/516071.rdf
Name: event
Units: integer
Description: <p>Number referring to the particular deployment activity (event) on the FluZiE cruise.</p>
http://lod.bco-dmo.org/id/dataset-parameter/516072.rdf
Name: cast
Units: integer
Description: <p>CTD Cast number from the FluZiE cruise.</p>
http://lod.bco-dmo.org/id/dataset-parameter/516073.rdf
Name: niskin
Units: integer
Description: <p>Niskin bottle that the sample was taken from.</p>
http://lod.bco-dmo.org/id/dataset-parameter/516074.rdf
Name: cycle
Units: integer
Description: <p>Refers to the 4-day Lagrangian experiment during which the sample was taken.</p>
http://lod.bco-dmo.org/id/dataset-parameter/516075.rdf
Name: sample
Units: unitless
Description: <p>Refers to a specific 234Th measurement.</p>
http://lod.bco-dmo.org/id/dataset-parameter/516076.rdf
Name: lat
Units: decimal degrees
Description: <p>Latitude (in degrees North) where the sample was collected.</p>
http://lod.bco-dmo.org/id/dataset-parameter/516077.rdf
Name: lon
Units: decimal degrees
Description: <p>Longitude (in degrees East) where the sample was collected.</p>
http://lod.bco-dmo.org/id/dataset-parameter/516078.rdf
Name: depth
Units: meters
Description: <p>Depth (in meters) that the sample was taken from as determined by CTD.</p>
http://lod.bco-dmo.org/id/dataset-parameter/516079.rdf
Name: sal
Units: practical salinity units (PSU)
Description: <p>Salinity determined by CTD.</p>
http://lod.bco-dmo.org/id/dataset-parameter/516080.rdf
Name: density
Units: kilograms per cubic meter (kg m-3)
Description: <p>Density determined by CTD.</p>
http://lod.bco-dmo.org/id/dataset-parameter/516081.rdf
Name: U238_activity
Units: decays per minute per liter (dpm L-1)
Description: <p>The activity of Uranium-238 (238U) estimated from salinity using the equation of Owens et al. (2011).</p>
http://lod.bco-dmo.org/id/dataset-parameter/516082.rdf
Name: Th234_activity
Units: decays per minute per liter (dpm L-1)
Description: <p>The activity of Thorium-234 (234Th).</p>
http://lod.bco-dmo.org/id/dataset-parameter/516083.rdf
Name: uncertainty
Units: decays per minute per liter (dpm L-1)
Description: <p>The uncertainty in 234Th activity determined by propagating our measurement uncertainty.</p>
http://lod.bco-dmo.org/id/dataset-parameter/516084.rdf
Name: ISO_DateTime_UTC
Units: unitless
Description: <p>Date and time (UTC) of CTD cast from which the water was drawn formatted to ISO 8601 standard. format: YYYY-mm-ddTHH:MM:SS.xx</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
9846
https://darchive.mblwhoilibrary.org/bitstream/1912/25006/1/dataset-516062_th-234-activity__v1.tsv
download
https://doi.org/10.1575/1912/bco-dmo.516062.1
download
onLine
dataset
<p>4-L samples for analysis of water column <sup>234</sup>Th concentrations were typically taken at 12 depths spanning the upper 150 m on two casts per experimental cycle. On two cycles in the core of the CRD, an additional set of 8 samples was taken to assess <sup>234</sup>Th deficiency down to 500-m depth. Samples were analyzed by standard small volume procedures (Benitez-Nelson et al. 2001, Buesseler et al. 2001, Pike et al. 2005). Immediately after collection, samples were acidified to a pH &lt; 2 with concentrated HNO<sub>3</sub>, spiked with 1 mL <sup>230</sup>Th tracer (0.17 Bq mL<sup>-1</sup>), shaken vigorously, and allowed to equilibrate for 4-9 hours. Samples were then basified to a pH of 8-9 with NH<sub>4</sub>OH. 100 uL each of KMnO<sub>4</sub> (7.5 g L<sup>-1</sup>) and MnCl<sub>2</sub> (33 g L<sup>-1</sup>) were added and samples were shaken then allowed to sit for &gt;8 hours as Th co-precipitated with manganese oxide. Samples were then filtered at high pressure onto a quartz microfiber (QMA) filter, dried in a drying oven, and mounted into RISO sample holders for beta counting.</p>
<p>Samples were beta counted at the University of South Carolina on a RISO low-level beta multi-counter within two months of the collection date. After an additional 8 months, samples were recounted to determine background beta emissions. Detector efficiency was calibrated using four samples taken from 2000-m depth (in water columns exceeding 3000-m depth), which were assumed to be at equilibrium with respect to <sup>234</sup>Th and <sup>238</sup>U. After background counts yield analyses were conducted as follows. Manganese oxide precipitate was dissolved from filters in 10 mL 8M HNO<sub>3</sub>/10% H<sub>2</sub>O<sub>2</sub>. 1 mL of <sup>229</sup>Th (1.66 Bq g<sup>-1</sup>) tracer was then added gravimetrically, and the sample was sonicated for 20 minutes and allowed to sit for &gt;6 hours. An aliquot of this solution was then filtered through a 0.1-mm syringe filter and diluted with 2.2M HNO<sub>3</sub>/1%HF for mass spec analysis of the <sup>229:230</sup>Th tracer ratio at the Woods Hole Oceanographic Institution Analytical Facility.</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
Mass Spec
Mass Spec
PI Supplied Instrument Name: Mass Spec PI Supplied Instrument Description:Mass spec analysis of the 229:230Th tracer ratio took place at the Woods Hole Oceanographic Institution Analytical Facility. Instrument Name: Mass Spectrometer Instrument Short Name:Mass Spec Instrument Description: General term for instruments used to measure the mass-to-charge ratio of ions; generally used to find the composition of a sample by generating a mass spectrum representing the masses of sample components. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB16/
RISO low-level beta multi-counter
RISO low-level beta multi-counter
PI Supplied Instrument Name: RISO low-level beta multi-counter PI Supplied Instrument Description:Samples were beta counted at the University of South Carolina on a RISO low-level beta multi-counter within two months of the collection date. Instrument Name: Riso Laboratory Anti-coincidence Beta Counter Instrument Short Name:Riso Beta Counter Instrument Description: Low-level beta detectors manufactured by Riso (now Nutech) in Denmark. These instruments accept samples that can be mounted on a 25mm filter holder. These detectors have very low backgrounds, 0.17 counts per minute, and can have counting efficiencies as high as 55%.
Typically used in laboratory analyses. Designed to measure low levels of beta particle emission. The systems work on the principle of anticoincidence.
Cruise: MV1008
MV1008
R/V Melville
Community Standard Description
International Council for the Exploration of the Sea
R/V Melville
vessel
MV1008
Michael R. Landry
University of California-San Diego Scripps
http://dmoserv3.whoi.edu/data_docs/CRD_FLUZiE/CRUISE_REPORT_Melville1008.pdf
Report describing MV1008
R/V Melville
Community Standard Description
International Council for the Exploration of the Sea
R/V Melville
vessel