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

Horikawa, Keiji; Minagawa, Masao; Murayama, Masafumi; Kato, Yoshihisa; Asahi, Hirofumi

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

Horikawa, Keiji; Minagawa, Masao; Murayama, Masafumi et al.

Geophysical Research Letters, 2006, 33(13), L13605

Permalink : https://hdl.handle.net/2115/14565

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アクセス権	open access
URI	https://hdl.handle.net/2115/14565
タイトル	Spatial and temporal sea-surface temperatures in the eastern equatorial Pacific over the past 150 kyr
著者	Horikawa, Keiji ; Minagawa, Masao ; Murayama, Masafumi ; Kato, Yoshihisa ; Asahi, Hirofumi
著者名 Horikawa, Keiji
著者名 Minagawa, Masao
著者名 Murayama, Masafumi
著者名 Kato, Yoshihisa
著者名 Asahi, Hirofumi
言語	英語
キーワード	TROPICAL PACIFIC
	EL-NINO
	CLIMATE
	OCEAN
	PALEOCLIMATE
	PLEISTOCENE
	ALKENONES
	RECORDS
	CYCLE
発行日	2006-07-12
出版者	American Geophysical Union
収録物名	Geophysical Research Letters
巻(号)	33(13)
ページ	L13605
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.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	An edited version of this paper was published by AGU. Copyright 2006, American Geophysical Union, GEOPHYSICAL RESEARCH LETTERS, VOL. 33
PISSN	0094-8276
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1029/2006GL025948