DOI: 10.1038/ngeo1823
论文题名: The effect of sea level on glacial Indo-Pacific climate
作者: Dinezio P.N. ; Tierney J.E.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2013
卷: 6, 期: 6 起始页码: 485
结束页码: 491
语种: 英语
Scopus关键词: climate variation
; glacial environment
; glacial-interglacial cycle
; Last Glacial Maximum
; oceanic convection
; reconstruction
; sea level
; tropical region
; Walker circulation
; warm pool
; Indian Ocean
; Indian Ocean (West)
; Pacific Ocean
; South China Sea
; Sunda Shelf
英文摘要: The Indo-Pacific warm pool - the main source of heat and moisture to the global atmosphere - plays a prominent role in tropical and global climate variability. During the Last Glacial Maximum, temperatures within the warm pool were cooler than today and precipitation patterns were altered, but the mechanism responsible for these shifts remains unclear. Here we use a synthesis of proxy reconstructions of warm pool hydrology and a multi-model ensemble of climate simulations to assess the drivers of these changes. The proxy data suggest drier conditions throughout the centre of the warm pool and wetter conditions in the western Indian and Pacific oceans. Only one model out of twelve simulates a pattern of hydroclimate change similar to our reconstructions, as measured by the Cohen's κ statistic. Exposure of the Sunda Shelf by lower glacial sea level plays a key role in the hydrologic pattern simulated by this model, which results from changes in the Walker circulation driven by weakened convection over the warm pool. We therefore conclude that on glacial-interglacial timescales, the growth and decay of ice sheets exert a first-order influence on tropical climate through the associated changes in global sea level. © 2013 Macmillan Publishers Limited. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106783
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: International Pacific Research Center, University of Hawaii, 1680 EastWest Road, Honolulu, HI 96822, United States; Woods Hole Oceanographic Institution, 266 Woods Hole Road, Woods Hole, MA 02543, United States
Recommended Citation:
Dinezio P.N.,Tierney J.E.. The effect of sea level on glacial Indo-Pacific climate[J]. Nature Geoscience,2013-01-01,6(6)