海洋古生产力重建初探──以南沙群岛海区NS90-103柱样为例

以南沙海区ＮＳ９０－１０３柱样为例，利用各种古生产力指标物，如有机碳含量，有孔虫壳和有孔虫碳同位素，重建了２０００００ａ以来古生产力变化，并对结果予以讨论。

PRELIMINARY STUDY ON RECONSTRUCTION OF MARINE PALEOPRODUCTIVITY: AN EXAMPLE FROM CORE NS90-103 IN THE SEA AREAS or NANSHA ISLANDS

The three sediment Parameters , such as organic matter content, foraminiferal shell and carbon isotopes in foraminifera, are good proxy for paleoproductivity. On the basis of these methods, the paleoproductivity of sediments core NS90-103 has been reconstructed. The changes of productivity between glacial and interglacial have been presented compelling evidence, which occured high productivity during glacial and lower productivity during interglacial. Although the statements about changes of productivity, and especially quantitative changes, are necessarily tentative, theestimate values by using Sarnthein equation are 70-100 gC. m-3a-l, which is closely consistant with the present values which are Calculated by data of Chloro- phylla. It is sugested that several proxies above simultaneously are advisable.