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 National Science
Foundation Award #9017827 |
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Nuclear Studies of Accumulating and Ablation Ice Using Cosmogenic 14c
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| Investigator(s): |
Devendra Lal (PI)
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| Sponsor: |
University of California-San Diego Scripps Inst of Oceanography, CA 92093 8585341293
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| Start Date/Expiration Date |
1991-02-01 to 1994-01-31 (amended 1992-03-10) |
| Awarded Amount to Date: |
$113,247 |
| Abstract: This award is for support of a study to establish a quantitative nuclear method for determination of Antarctic ablation and accumulation rates and to provide correction factors for the carbon 14 ages of ice samples dated using trapped carbon 14. Recent studies have established the presence of cosmogenic in-situ produced carbon 14 in polar ice. In conjunction with estimated carbon 14 production rates, measured concentrations of carbon 14 per gram of ice yield, ablation rates which are in good agreement with the values determined from stake measurements. Similar studies to determine accumulation rates have been tested and the estimates are consistent with previous studies. This study will expand the preliminary work done to date in order to improve the 14CO and 14CO2 vacuum extraction techniques, by lowering blank levels and by obtaining more complete separation of 14CO and 14CO2. |
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| NSF Org: |
OPP - Office of Polar Programs |
| Award Number: |
9017827 |
| Award Instrument: |
Continuing grant |
| Program Manager: |
Julie Palais
OPP Office of Polar Programs
O/D OFFICE OF THE DIRECTOR
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| NSF Program(s): |
ANTARCTIC GLACIOLOGY, ANTARCTIC GLACIOLOGY
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| Field Application(s): |
Geological Sciences, Polar Programs-Related |
| Program Element Code(s): |
5116
, 5116
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