Award Abstract # 0646817
Millennial variations in Arabian Sea sediment proxies: the connection to North Atlantic climate

NSF Org: OCE
Division Of Ocean Sciences
Recipient: TEXAS A & M RESEARCH FOUNDATION
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 2004 = $13,479.00
FY 2005 = $7,000.00

FY 2006 = $25,001.00
History of Investigator:
  • Franco Marcantonio (Principal Investigator)
    marcantonio@geo.tamu.edu
Recipient Sponsored Research Office: Texas A&M Research Foundation
400 HARVEY MITCHELL PKWY S STE 300
COLLEGE STATION
TX  US  77845-4375
(979)862-6777
Sponsor Congressional District: 10
Primary Place of Performance: Texas A&M Research Foundation
400 HARVEY MITCHELL PKWY S STE 300
COLLEGE STATION
TX  US  77845-4375
Primary Place of Performance
Congressional District:
10
Unique Entity Identifier (UEI): EQH8NQ4AXFT7
Parent UEI:
NSF Program(s): Marine Geology and Geophysics,
EPSCoR Co-Funding
Primary Program Source: app-0105 
app-0106 

04000405DB NSF Education & Human Resource
Program Reference Code(s): OTHR, 0000, 7582, 1620, 9150
Program Element Code(s): 162000, 915000
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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