書誌事項
- タイトル別名
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- Paleoceanography of the Oyashio Area during the Last 20,000 Years Based on Benthic Foraminifera.
- テイセイユウコウチュウ カラ スイテイ サレル カコ 2マンネンカン ノ オヤシオイキ ニ オケル カイヨウ カンキョウ
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説明
Benthic foraminifera in two cores, ST-5 and ST-21, collected from the Oyashio area show paleoenvironmental changes during the last 20, 000 years. Benthic foraminif eral fauna from both cores exhibit large changes during the last glacial-Holocene transition. Glacial fauna of core ST-5 closely resemble modern fauna living around a depth of 2, 000m under the confluence zone between the Kuroshio and Oyashio currents. This indicates that glacial paleoenvironments off Erimo Cape were similar to recent deep-water conditions under the confluence zone. However, Holocene fauna of core ST-5 show that carbonate dissolution has intensified in depths near 2, 000m. Glacial fauna of core ST-21 demonstrate that intermediate waters that originated from the northern North Pacific had intensified around a depth of 1, 000m. Middle and late Holocene fauna of core ST-21 reflect a low-oxygen condition similar to intermediate waters in the recent Oyashio area, although the area's oxygen level temporarily increased during the middle Holocene.
収録刊行物
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- 第四紀研究
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第四紀研究 39 (5), 427-438, 2000
日本第四紀学会
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詳細情報 詳細情報について
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- CRID
- 1390001206497204224
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- NII論文ID
- 10007430093
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- NII書誌ID
- AN0034136X
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- ISSN
- 18818129
- 04182642
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- NDL書誌ID
- 5597710
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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
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可
