古海洋生产力的研究方法

海洋的初级生产力控制了温室气体CO2在海洋和大气中的分配,进而影响着全球气候变迁,只有通过运用不同的生产力标志物才能探讨地质历史上海洋初级生产力的变迁及其对气候的影响。介绍了国内外在古海洋生产力研究领域内使用的主要方法和动态,并分别对生源物质累积率、底栖有孔虫标志物和地球化学标志物等研究方法进行了全面的分析和评述,指出在运用生产力标志物研究古生产力时应充分考虑不同标志物的适用性和局限性。

Method to Study Ancient Oceanic Productivity

Primary productivity of surface ocean controls the distribution of CO (2) in deep ocean and atmosphere, and then affects the global climatic system. It is necessary to use different paleoproductivity proxies to understand the variations of marine paleoproductivity in the past and their influences on global climatic system. The authors introduce some important progresses made in studies of paleoproductivity. The proxies discussed include biogenic material accumulation rates (such as organic carbon, opal, biogenic carbonate)and benthic foraminifera markers. It is proposed that limitations and application ranges of these proxies should be taken into account when we use them to study paleoproductivity.