
NSF Org: |
OCE Division Of Ocean Sciences |
Recipient: |
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Initial Amendment Date: | September 6, 2006 |
Latest Amendment Date: | September 6, 2006 |
Award Number: | 0646817 |
Award Instrument: | Standard Grant |
Program Manager: |
Howard J. Spero
OCE Division Of Ocean Sciences GEO Directorate for Geosciences |
Start Date: | July 1, 2006 |
End Date: | April 30, 2007 (Estimated) |
Total Intended Award Amount: | $13,480.00 |
Total Awarded Amount to Date: | $45,480.00 |
Funds Obligated to Date: |
FY 2005 = $7,000.00 FY 2006 = $25,001.00 |
History of Investigator: |
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Recipient Sponsored Research Office: |
400 HARVEY MITCHELL PKWY S STE 300 COLLEGE STATION TX US 77845-4375 (979)862-6777 |
Sponsor Congressional District: |
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Primary Place of Performance: |
400 HARVEY MITCHELL PKWY S STE 300 COLLEGE STATION TX US 77845-4375 |
Primary Place of
Performance Congressional District: |
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Unique Entity Identifier (UEI): |
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Parent UEI: |
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NSF Program(s): |
Marine Geology and Geophysics, EPSCoR Co-Funding |
Primary Program Source: |
app-0106 04000405DB NSF Education & Human Resource |
Program Reference Code(s): |
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Program Element Code(s): |
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Award Agency Code: | 4900 |
Fund Agency Code: | 4900 |
Assistance Listing Number(s): | 47.050 |
ABSTRACT
Under this award the PIs will use a variety of paleoproductivity proxies to test the hypothesis that millennial changes in OMZ intensity in the Arabian Sea are directly related to changes in the intensity of upwelling-favorable winds associated with the SW Indian Ocean monsoon. To reconstruct export production on stadial/interstadial timescales in the Arabian Sea the PIs will measure at high-resolution the 230Th-derived accumulation rates of total organic carbon and total C37-alkenones, the authigenic uranium concentration, and the xs231Pa/xs230Th ratio. The alkenone unsaturation ratio (Uk. 37) will be used to reconstruct past sea-surface temperatures (SSTs) on stadial/interstadial timescales. Results of this work will improve understanding of 1) the teleconnections linking climate variability in the Arabian Sea to well-established records in the high-latitude North Atlantic region, 2) proxies of export production in sediments, and 3) the relationship between SST and the dynamics of the Indian Ocean monsoon system.
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