最終氷期以降の海洋炭素循環と収支に関する研究(2004年度日本地球化学会奨励賞受賞記念論文)
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概要
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The world ocean is a key component of the global climate system, because the oceans hold very large amounts of both heat and carbon compared to other surface reservoirs. Therefore, it is likely that large, geologically documented changes in atmospheric CO_2 content and global climate during the latter half of the Pleistocene are strongly associated with some changes in the oceanic carbon budget. This likelihood and a growing recognition that the presently rising atmospheric CO_2 content may induce dangerous levels of global warming in the near future heighten our drive to better understand the oceanic carbon cycle. Yet there is sizable gap in our knowledge of this very important and challenging field. Given the opportunity to introduce my work here, I provide a perspective on the state of our knowledge in three aspects of the ocean carbon cycle in which I have done some research. My perspective is not meant to be comprehensive, as the enormously diverse body of knowledge in this field has benefited from many and only marginally from my work. The three aspects are: (1) oceanic role in accounting for the low atmospheric CO_2 content during the last glacial maximum; (2) oceanic uptake of anthropogenic carbon since the preindustrial period; and (3) oceanic sequestration of anthropogenic carbon by direct injection. In each, I present the state of our knowledge (including gaps) as I see it, touch on my contribution, and lay out possible future directions. In order to give some sense of coherency, I limit the introduction of my work to those involving numerical ocean biogeochemistry models of various levels of complexity.
- 日本地球化学会の論文
- 2005-03-30