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Spatial and temporal sea-surface temperatures in the eastern equatorial Pacific over the past 150 kyr

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タイトル: Spatial and temporal sea-surface temperatures in the eastern equatorial Pacific over the past 150 kyr
著者: Horikawa, Keiji 著作を一覧する
Minagawa, Masao 著作を一覧する
Murayama, Masafumi 著作を一覧する
Kato, Yoshihisa 著作を一覧する
Asahi, Hirofumi 著作を一覧する
キーワード: TROPICAL PACIFIC
EL-NINO
CLIMATE
OCEAN
PALEOCLIMATE
PLEISTOCENE
ALKENONES
RECORDS
CYCLE
発行日: 2006年 7月12日
出版者: American Geophysical Union
誌名: Geophysical Research Letters
巻: 33
号: 13
開始ページ: L13605
出版社 DOI: 10.1029/2006GL025948
抄録: We present the new alkenone-based sea-surface temperature (SST) records from the eastern equatorial Pacific over the past 150 kyr. Core HY04 (4°N) at the North Equatorial Countercurrent (NECC) registered the invariant SSTs (25.8–27.2°C), whereas core HY06 (0°N) registered cyclic glacial-interglacial SST variations (22.4–26.1°C). Although HY06 alkenone-based SST evolution was almost consistent with the previously published SST records from around the equator, at site HY04 alkenone- and foraminiferal Mg/Ca-based SSTs showed a large difference in the magnitude of LGM SST cooling. We hypothesize that alkenone-based SSTs might not fully express the true magnitude of glacial SST cooling in the NECC, as suggested by the coincidence of higher glacial productivity and unchanged glacial SSTs at site HY04. However, further SST data in the NECC are needed before this can be accepted with any degree of confidence.
Rights: An edited version of this paper was published by AGU. Copyright 2006, American Geophysical Union, GEOPHYSICAL RESEARCH LETTERS, VOL. 33
資料タイプ: article
URI: http://hdl.handle.net/2115/14565
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 堀川 恵司

 

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