High Resolution Reconstruction of Arabian Sea Denitrification and Its Forcing by Productivity and Hydrography
High Resolution Reconstruction of Arabian Sea Denitrification and Its Forcing by Productivity and Hydrography
批准号:
9905612
负责人:
Mark Altabet
金额:
$28.2万
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
1999
资助国家:
美国
项目状态:
已结题
起止时间:
1999-08-01 至 2003-07-31
中文摘要
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英文摘要
The ESH project will study the changes in denitrification of the Arabian Sea over the last glacial cycle at a resolution of a few hundred years. Both regional productivity and hydrographic conditions contribute to the suboxic intermediate waters necessary for denitrification. The project will study a set of cores from the Oman margin transecting the modern range of suboxic waters, concentrating on times of rapid global climate change. Variables to be analyzed include 15 N/14 N of sediment organic matter, carbon and oxygen isotopes of foraminiera, abundance of planktic foraminifera indicative of upwelling and of oxidation state of the intermediate waters, and Ba flux as a second measure of production.
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