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学科主题: Geography, Physical; Geosciences, Multidisciplinary
题名: Post-glacial evolution of the Indo-Pacific Warm Pool and El Nino-Southern Oscillation
作者: Gagan, MK ; Hendy, EJ ; Haberle, SG ; Hantoro, WS
通讯作者: michael.gagan@anu.edu
刊名: QUATERNARY INTERNATIONAL
发表日期: 2004-01-01
卷: 118, 页:127-143
收录类别: sci
部门归属: Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 0200, Australia; Monash Univ, Dept Geog & Environm Sci, Clayton, Vic 3168, Australia; Indonesian Inst Sci, Res & Dev Ctr Geotechnol, Bandung 40135, Indonesia
摘要: Recent research has revealed new insights into the temperature, size, and variability of the Indo-Pacific Warm Pool (IPWP) and the nature of the El Nino-Southern Oscillation (ENSO) since the Last Glacial Maximum (LGM). Sea surface temperature (SST) reconstructions from foraminiferal Mg/Ca, alkenone, and revised coral Sr/Ca palaeothermometry agree that SSTs in the IPWP during the LGM were similar to 3degreesC cooler than at present. In the central portion of the IPWF, the rapid post-glacial rise in SST led the deglaciation by similar to 3000 years to produce near-modern SSTs by the early Holocene. In contrast, further west and north, post-glacial shifts in SSTs in the South China and Sulu Seas are synchronous with abrupt climate changes in the North Atlantic. New evidence for the nature of the Little Ice Age in the tropics has been obtained from a 420-year record of coral Sr/Ca and 6180 from the Great Barrier Reef, Australia. This indicates that SSTs and salinity were higher in the 18th century than in the 20th century. The results suggest that the tropical Pacific played a role as a source region of water vapour during the global expansion of Little Ice Age glaciers. The onset of modern ENSO periodicities is identified by palaeo-ENSO records throughout the tropical Pacific region similar to 5000 years ago, with an abrupt increase in ENSO magnitude similar to 3000 years ago. Individual ENSO events recorded by corals reveal that the precipitation response to El Nino temperature anomalies was subdued in the mid-Holocene. The apparent non-linear onset of ENSO in the late Holocene appears to reflect abruptly enhanced interaction between the Southern Oscillation and the Pacific Intertropical Convergence Zone. Comparisons of precipitation variability recorded by Great Barrier Reef corals with ENSO indices for the last 350 years confirms that non-stationarity of ENSO teleconnections is a natural characteristic of modern climate. (C) 2003 Elsevier Ltd and INQUA. All rights reserved.
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/8487
Appears in Collections:海洋科技动态信息-印太暖池系统研究_期刊论文

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Gagan, MK; Hendy, EJ; Haberle, SG; Hantoro, WS.Post-glacial evolution of the Indo-Pacific Warm Pool and El Nino-Southern Oscillation,QUATERNARY INTERNATIONAL,2004,118():127-143
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文件名: Post-glacial evolution of the Indo-Pacific Warm Pool and El Nino-Southern Oscillation.pdf
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