最終氷期における深層水循環と基礎生産力

概要

論文の詳細を見る
Paleoceanography not only reveals physical, chemical, biological and geological changes in the ocean, but also provides clues to understand the effect of oceanic variations on climate change and to predict future changes in the global environment which may occur as the anthropogenic material emission. The discovery of atmospheric CO_2 decrease during the last glacial period between 75,000 years and 10,000 years ago has become a world-wide topic of interest and much effort has been focused on the study of the ocean's role in the control of atmospheric CO_2 and the global environment. In this paper, the following topics are reviewed: (1) the inability of orbitally driven change in the earth's radiation budget to explain the glacial cycle, (2) the decrease in the formation of North Atlantic Deep Water (NADW) during the last glacial period revealed by records of carbon isotopes, and (3) the hypothesis that the decrease of atmospheric CO_2 during the last glacial period can be attributed to an increase of ocean productivity.
日本海洋学会の論文
1994-06-30