Productivity changes in the Bering Sea during the late Quaternary

Yusuke Okazaki, Kozo Takahashi, Hirofumi Asahi, Kota Katsuki, Joichi Hori, Hisato Yasuda, Yuko Sagawa, Hidekazu Tokuyama

研究成果: Contribution to journalArticle査読

64 被引用数 (Scopus)

抄録

Changes in biological productivity of the Bering Sea have been evaluated for the late Quaternary based on biogenic opal, calcium carbonate, and microfossils in two piston cores. Biological productivity increased during Marine Isotope Stage (MIS) 1 after the last glaciation. During the last deglaciation, two pronounced peaks of calcium carbonate content were observed at ca. 2400 m water depth, which can be explained by the "CaCO3 compensation hypothesis" and coccolithophore blooms. Simultaneous with the CaCO3 peaks, oxygen-poor deep water was apparently distributed in the Aleutian Basin based on benthic foraminiferal assemblages. The low-O 2 events seem to be related to deep-water circulation and/or elevated productivity in the northwest Pacific. After the CaCO3 peak events, biogenic opal contents and diatoms increased gradually, associated with enhanced vertical mixing with an inflow of the Alaskan Stream through the eastern Aleutian Arc passes.

本文言語英語
ページ(範囲)2150-2162
ページ数13
ジャーナルDeep-Sea Research Part II: Topical Studies in Oceanography
52
16-18
DOI
出版ステータス出版済み - 8 1 2005
外部発表はい

All Science Journal Classification (ASJC) codes

  • Oceanography

フィンガープリント 「Productivity changes in the Bering Sea during the late Quaternary」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル