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Hokkaido University Collection of Scholarly and Academic Papers >
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Spatial and temporal sea-surface temperatures in the eastern equatorial Pacific over the past 150 kyr
| Title: | Spatial and temporal sea-surface temperatures in the eastern equatorial Pacific over the past 150 kyr |
| Authors: | Horikawa, Keiji Browse this author | | Minagawa, Masao Browse this author | | Murayama, Masafumi Browse this author | | Kato, Yoshihisa Browse this author | | Asahi, Hirofumi Browse this author |
| Keywords: | TROPICAL PACIFIC | | EL-NINO | | CLIMATE | | OCEAN | | PALEOCLIMATE | | PLEISTOCENE | | ALKENONES | | RECORDS | | CYCLE |
| Issue Date: | 12-Jul-2006 |
| Publisher: | American Geophysical Union |
| Journal Title: | Geophysical Research Letters |
| Volume: | 33 |
| Issue: | 13 |
| Start Page: | L13605 |
| Publisher DOI: | 10.1029/2006GL025948 |
| Abstract: | 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 |
| Type: | article |
| URI: | http://hdl.handle.net/2115/14565 |
| Appears in Collections: | 環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 堀川 恵司
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