Dynamic millennial‐scale climate changes in the northwestern Pacific over the past 40,000 years
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- M.‐T. Chen
- Institute of Applied Geosciences National Taiwan Ocean University Keelung Taiwan
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- X. P. Lin
- Physical Oceanography Laboratory Ocean University of China Qingdao China
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- Y.‐P. Chang
- Institute of Applied Geosciences National Taiwan Ocean University Keelung Taiwan
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- Y.‐C. Chen
- Institute of Applied Geosciences National Taiwan Ocean University Keelung Taiwan
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- L. Lo
- Department of Geosciences National Taiwan University Taipei Taiwan
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- C.‐C. Shen
- Department of Geosciences National Taiwan University Taipei Taiwan
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- Y. Yokoyama
- Atmosphere and Ocean Research Institute and Department of Earth and Planetary Sciences University of Tokyo Kashiwanoha Japan
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- D. W. Oppo
- Department of Geology and Geophysics Woods Hole Oceanographic Institution Woods Hole Massachusetts USA
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- W. G. Thompson
- Department of Geology and Geophysics Woods Hole Oceanographic Institution Woods Hole Massachusetts USA
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- R. Zhang
- Geophysical Fluid Dynamics Laboratory, NOAA Princeton New Jersey USA
書誌事項
- 公開日
- 2010-12
- 資源種別
- journal article
- 権利情報
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- http://onlinelibrary.wiley.com/termsAndConditions#vor
- DOI
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- 10.1029/2010gl045202
- 公開者
- American Geophysical Union (AGU)
この論文をさがす
説明
<jats:p>Ice core records of polar temperatures and greenhouse gases document abrupt millennial‐scale oscillations that suggest the reduction or shutdown of thermohaline Circulation (THC) in the North Atlantic Ocean may induce the abrupt cooling in the northern hemisphere. It remains unknown, however, whether the sea surface temperature (SST) is cooling or warming in the Kuroshio of the Northwestern Pacific during the cooling event. Here we present an AMS <jats:sup>14</jats:sup>C‐dated foraminiferal Mg/Ca SST record from the central Okinawa Trough and document that the SST variations exhibit two steps of warming since 21 ka — at 14.7 ka and 12.8 ka, and a cooling (∼1.5°C) during the interval of the Younger Dryas. By contrast, we observed no SST change or oceanic warming (∼1.5–2°C) during the episodes of Northern Hemisphere cooling between ∼21–40 ka. We therefore suggest that the “Antarctic‐like” timing and amplitude of millennial‐scale SST variations in the subtropical Northwestern Pacific between 20–40 ka may have been determined by rapid ocean adjustment processes in response to abrupt wind stress and meridional temperature gradient changes in the North Pacific.</jats:p>
収録刊行物
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- Geophysical Research Letters
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Geophysical Research Letters 37 (23), L23603-, 2010-12
American Geophysical Union (AGU)
