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- 大場 忠道
- 北海道大学大学院地球環境科学研究科
書誌事項
- タイトル別名
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- The Last Glacial World Estimated from the North Pacific Deep-sea Cores.
- キタ タイヘイヨウ ノ シンカイテイ コア カラ スイソクサレル サイシュウ
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Comparing mutually the records of several deep-sea cores from the North Pacific, it is concluded that glacial ages had high accumulation rate of organic carbon and weak carbonate dissolution rate than interglacial ages. However, the increase of biological productivity in surface water generally causes the drop of the pH of the underlying water and leads to high carbonate dissolution. A key to solve this contradiction is probably carbonate particles in aeolian dust which were extensively supplied to the entire ocean during glacial ages. By dissolving the carbonate particles in water column, the alkalinity of the sea water increased. Hence the atmospheric CO2 was absorbed by the upwelling water with high alkalinity, as well as by the photosynthesis of marine plankton increased during glacial ages. The variation of atmospheric CO2 concentration is not related to the deep water circulation but to the conditions of the surface and middle layers in the ocean.
収録刊行物
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- 地学雑誌
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地学雑誌 103 (7), 853-860, 1994
公益社団法人 東京地学協会
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詳細情報 詳細情報について
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- CRID
- 1390001204230642944
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- NII論文ID
- 10007193469
- 10003565996
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- NII書誌ID
- AN00322536
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- ISSN
- 18840884
- 0022135X
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- NDL書誌ID
- 3595891
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
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- 使用不可