Th-234 in particulate and dissolved phases; POC/PON from RVIB Nathaniel B. Palmer and R/V Roger Revelle cruises in the Southern Ocean, 1997-1998 (U.S. JGOFS AESOPS project)

Website: https://www.bco-dmo.org/dataset/2733
Version: final
Version Date: 1999-12-13

Project
» U.S. JGOFS Antarctic Environment and Southern Ocean Process Study (AESOPS)

Program
» U.S. Joint Global Ocean Flux Study (U.S. JGOFS)
ContributorsAffiliationRole
Buesseler, Kenneth O.Woods Hole Oceanographic Institution (WHOI)Principal Investigator
Bacon, MichaelWoods Hole Oceanographic Institution (WHOI)Co-Principal Investigator
Cochran, J. KirkStony Brook University (SUNY Stony Brook)Co-Principal Investigator
Chandler, Cynthia L.Woods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager


Dataset Description

Th-234 in particulate and dissolved phases; POC/PON


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Parameters

ParameterDescriptionUnits
eventevent number from event log
stastation number from event log
latlatitude in decimal degrees
lonlongitude in decimal degrees
sampleintegrated=in-situ pump (Slurper) integrated over depth range discrete=in-situ pump (Slurper) at one discrete depth
depth_nnominal depth meters
Th234_p_gt70particulate Th234 activity in the size fraction greater than 70 microns dpm/liter
err_p_gt70error of particulate Th234 activity greater than 70 microns; 1 sigma
Th234_p_1to70particulate Th234 activity in the size fraction between 1 and 70 microns dpm/liter
err_p_1to70error of particulate Th234 activity between 1 and 70 microns; 1 sigma
Th234_ddissolved Th234 activity dpm/liter
Th234_d_errerror of dissolved Th234 activity; 1 sigma dpm/liter
Th234_ttotal Th234 activity dpm/liter
Th234_t_errerror of total Th234 activity; 1 sigma dpm/liter
flag_qTh234 data quality code a = good b = Mn cartridge efficiency poor c = other error
POC_gt70particulate organic carbon in the size fraction greater than 70 microns umol/liter
PON_gt70particulate organic nitrogen in the size fraction greater than 70 microns umol/liter
POC_1to70particulate organic carbon in the size fraction between 1 and 70 microns umol/liter
PON_1to70particulate organic nitrogen in the size fraction between 1 and 70 microns umol/liter


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Instruments

Dataset-specific Instrument Name
Ken Buesseler's Slurper pump
Generic Instrument Name
Slurper Pump
Dataset-specific Description
Ken Buesseler's Slurper th234_pump, thorium-234 pump.
Generic Instrument Description
The 'Slurper' is a custom designed in situ pumping system that pumps seawater in a way that allows large-volume sampling of pre-determined depth intervals. The 'Slurper' was used during US JGOFS cruises to acquire samples for 234-Thorium and POC/PON analysis (Buesseler et al., 1988). The 'Slurper' sampling system comprised a positive displacement pump coupled to a DC motor. Pump speed and sample volume were controlled via shipboard laptop computer. References: Buesseler, K. O., L. Ball, J. Andrews, C. Benitez-Nelson, R. Belastock, F. Chai and Y.Chao. 1998. Upper Ocean Export of Particulate Organic Carbon in the Arabian Sea derived from Thorium-234. Deep-Sea Res. II, Arabian Sea Volume, Vol. 45, No. 10-11, 2461-2488.


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Deployments

NBP-96-04A

Website
Platform
RVIB Nathaniel B. Palmer
Report
Start Date
1996-10-02
End Date
1996-11-08
Description
Ross Sea Process Study 1

Methods & Sampling
PI: Ken Buesseler, Michael Bacon and Kirk Cochran of: Woods Hole Oceanographic Institution (Buesseler,Bacon) and SUNY/Stony Brook (Cochran) dataset: Th-234 in particulate and dissolved phases; POC/PON dates: October 08, 1996 to November 05, 1996 location: N: -63.4455 S: -77.9937 W: 168.9907 E: -177.9562 project/cruise: AESOPS/NBP-96-4A - Ross Sea Process 1 Cruise ship: R/V Nathaniel B. Palmer Methodology Reference K. Buesseler, L. Ball, J. Andrews, C. Benitez-Nelson, R. Belastock, F. Chai and Y. Chao. Upper ocean export of particulate organic carbon in the Arabian Sea derived from thorium-234. Deep-Sea Research II, Vol. 45, No. 10-11, p.2461.

NBP-97-01

Website
Platform
RVIB Nathaniel B. Palmer
Report
Start Date
1997-01-13
End Date
1997-02-11
Description
Ross Sea Process Study 2

Methods & Sampling
PI: Ken Buesseler, Michael Bacon and Kirk Cochran of: Woods Hole Oceanographic Institution (Buesseler,Bacon) and SUNY/Stony Brook (Cochran) dataset: Th-234 in particulate and dissolved phases; POC/PON dates: January 13, 1997 to February 08, 1997 location: N: -74.0085 S: -77.392 W: 168.9067 E: -175.9915 project/cruise: AESOPS/NBP-97-1 - Ross Sea Process 2 Cruise ship: R/V Nathaniel B. Palmer Methodology Reference K. Buesseler, L. Ball, J. Andrews, C. Benitez-Nelson, R. Belastock, F. Chai and Y. Chao. Upper ocean export of particulate organic carbon in the Arabian Sea derived from thorium-234. Deep-Sea Research II, Vol. 45, No. 10-11, p.2461.

NBP-97-03

Website
Platform
RVIB Nathaniel B. Palmer
Report
Start Date
1997-04-04
End Date
1997-05-11
Description
Ross Sea Process Study 3

Methods & Sampling
PI: Ken Buesseler, Michael Bacon and Kirk Cochran of: Woods Hole Oceanographic Institution (Buesseler,Bacon) and SUNY/Stony Brook (Cochran) dataset: Th-234 in particulate and dissolved phases; POC/PON dates: April 10, 1997 to May 04, 1997 location: N: -67.6337 S: -77.9897 W: 168.9694 E: -176.1115 project/cruise: AESOPS/NBP-97-3 - Ross Sea Process Cruise 3 ship: R/V Nathaniel B. Palmer Methodology Reference K. Buesseler, L. Ball, J. Andrews, C. Benitez-Nelson, R. Belastock, F. Chai and Y. Chao. Upper ocean export of particulate organic carbon in the Arabian Sea derived from thorium-234. Deep-Sea Research II, Vol. 45, No. 10-11, p.2461.

KIWI6

Website
Platform
R/V Roger Revelle
Report
Start Date
1997-10-20
End Date
1997-11-24
Description
Polar Front Survey I

Methods & Sampling
PI: Ken Buesseler, Michael Bacon and Kirk Cochran of: Woods Hole Oceanographic Institution (Buesseler,Bacon) and SUNY/Stony Brook (Cochran) dataset: Th-234 in particulate and dissolved phases; POC/PON dates: October 24, 1997 to November 18, 1997 location: N: -57.0148 S: -62.3172 W: -170.6927 E: -168.1918 project/cruise: AESOPS/KIWI6 - APFZ Polar Front Survey 1 cruise ship: R/V Roger A. Revelle Methodology Reference K. Buesseler, L. Ball, J. Andrews, C. Benitez-Nelson, R. Belastock, F. Chai and Y. Chao. Upper ocean export of particulate organic carbon in the Arabian Sea derived from thorium-234. Deep-Sea Research II, Vol. 45, No. 10-11, p.2461.

KIWI7

Website
Platform
R/V Roger Revelle
Report
Start Date
1997-12-02
End Date
1998-01-03
Description
Polar Front Process I

Methods & Sampling
PI: Ken Buesseler, Michael Bacon and Kirk Cochran of: Woods Hole Oceanographic Institution (Buesseler,Bacon) and SUNY/Stony Brook (Cochran) dataset: Th-234 in particulate and dissolved phases; POC/PON dates: December 04, 1997 to December 26, 1997 location: N: -53.0298 S: -64.6732 W: -174.7287 E: -168.8332 project/cruise: AESOPS/KIWI7 - APFZ Polar Front Process 1 cruise ship: R/V Roger A. Revelle Methodology Reference K. Buesseler, L. Ball, J. Andrews, C. Benitez-Nelson, R. Belastock, F. Chai and Y. Chao. Upper ocean export of particulate organic carbon in the Arabian Sea derived from thorium-234. Deep-Sea Research II, Vol. 45, No. 10-11, p.2461.

KIWI8

Website
Platform
R/V Roger Revelle
Report
Start Date
1998-01-08
End Date
1998-02-08
Description
Polar Front Survey II

Methods & Sampling
PI: Ken Buesseler, Michael Bacon and Kirk Cochran of: Woods Hole Oceanographic Institution (Buesseler,Bacon) and SUNY/Stony Brook (Cochran) dataset: Th-234 in particulate and dissolved phases; POC/PON dates: January 17, 1998 to January 28, 1998 location: N: -60 S: -67.7842 W: -170.1133 E: -170.1 project/cruise: AESOPS/KIWI8 - APFZ Polar Front Survey 2 cruise ship: R/V Roger A. Revelle Methodology Reference K. Buesseler, L. Ball, J. Andrews, C. Benitez-Nelson, R. Belastock, F. Chai and Y. Chao. Upper ocean export of particulate organic carbon in the Arabian Sea derived from thorium-234. Deep-Sea Research II, Vol. 45, No. 10-11, p.2461.

KIWI9

Website
Platform
R/V Roger Revelle
Report
Start Date
1998-02-13
End Date
1998-03-19
Description
Polar Front Process II

Methods & Sampling
PI: Ken Buesseler, Michael Bacon and Kirk Cochran of: Woods Hole Oceanographic Institution (Buesseler,Bacon) and SUNY/Stony Brook (Cochran) dataset: Th-234 in particulate and dissolved phases; POC/PON dates: February 16, 1998 to March 15, 1998 location: N: -52.9775 S: -70.4002 W: -174.733 E: -165.9148 project/cruise: AESOPS/KIWI9 - APFZ Polar Front Process 2 cruise ship: R/V Roger A. Revelle Methodology Reference K. Buesseler, L. Ball, J. Andrews, C. Benitez-Nelson, R. Belastock, F. Chai and Y. Chao. Upper ocean export of particulate organic carbon in the Arabian Sea derived from thorium-234. Deep-Sea Research II, Vol. 45, No. 10-11, p.2461.


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Project Information

U.S. JGOFS Antarctic Environment and Southern Ocean Process Study (AESOPS)


Coverage: Southern Ocean, Ross Sea


The U.S. Southern Ocean JGOFS program, called Antarctic Environment and Southern Ocean Process Study (AESOPS), began in August 1996 and continued through March 1998. The U.S. JGOFS AESOPS program focused on two regions in the Southern Ocean: an east/west section of the Ross-Sea continental shelf along 76.5°S, and a second north/south section of the Southern Ocean spanning the Antarctic Circumpolar Current (ACC) at ~170°W (identified as the Polar Front). The science program, coordinated by Antarctic Support Associates (ASA), comprised eleven cruises using the R.V.I.B Nathaniel B. Palmer and R/V Roger Revelle as observational platforms and for deployment and recovery of instrumented moorings and sediment-trap arrays. The Ross-Sea region was occupied on six occasions and the Polar Front five times. Mapping data were obtained from SeaSoar, ADCP, and bathymetric systems. Satellite coverage was provided by the NASA SeaWiFS and the NOAA/NASA Pathfinder programs.



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Program Information

U.S. Joint Global Ocean Flux Study (U.S. JGOFS)


Coverage: Global


The United States Joint Global Ocean Flux Study was a national component of international JGOFS and an integral part of global climate change research.

The U.S. launched the Joint Global Ocean Flux Study (JGOFS) in the late 1980s to study the ocean carbon cycle. An ambitious goal was set to understand the controls on the concentrations and fluxes of carbon and associated nutrients in the ocean. A new field of ocean biogeochemistry emerged with an emphasis on quality measurements of carbon system parameters and interdisciplinary field studies of the biological, chemical and physical process which control the ocean carbon cycle. As we studied ocean biogeochemistry, we learned that our simple views of carbon uptake and transport were severely limited, and a new "wave" of ocean science was born. U.S. JGOFS has been supported primarily by the U.S. National Science Foundation in collaboration with the National Oceanic and Atmospheric Administration, the National Aeronautics and Space Administration, the Department of Energy and the Office of Naval Research. U.S. JGOFS, ended in 2005 with the conclusion of the Synthesis and Modeling Project (SMP).



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