Oscillations in the southern extent of the Indo-Pacific Warm Pool during the mid-Holocene

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 海洋科技动态信息-印太暖池系统研究

	Oscillations in the southern extent of the Indo-Pacific Warm Pool during the mid-Holocene
	Hantoro, WS; Abram, NJ; McGregor, HV; Suwargadi, BW; Gagan, MK; nabr@bas.ac.uk
刊名	QUATERNARY SCIENCE REVIEWS
	2009
卷号	28 期号:25-26 页码:2794-2803
ISSN号	0277-3791
英文摘要	The Indo-Pacific Warm Pool (IPWP) is thought to play a key role in the propagation and amplification of climate changes through its influence on the global distribution of heat and water vapour. However, little is known about past changes in the size and position of the IPWP. In this study, we use a total of 48 modern and fossil coral records from the Mentawai Islands (Sumatra, Indonesia) and Muschu/Koil Islands (Papua New Guinea) to reconstruct oscillations in the extent of the IPWP since the mid-Holocene. We show that reliable estimates of mean sea surface temperature (SST) can be obtained from fossil corals by using low-resolution Sr/Ca analysis of a suite of corals to overcome the large uncertainties associated with mean Sr/Ca-SST estimates from individual coral colonies. The coral records indicate that the southeastern and southwestern margins of the IPWP were cooler than at present between similar to 5500 and 4300 years BP (similar to 1.2 degrees C +/- 0.3 degrees C) and were similarly cool before similar to 6800 years BP. This mid-Holocene cooling was punctuated by an abrupt, short-lived shift to mean SSTs that were warmer than at present between similar to 6600 and 6300 years BP (similar to 1.3 degrees C +/- 0.3 degrees C), while similarly warm conditions may have also existed after similar to 4300 years BP. We suggest that mid-Holocene cooling at our study sites was related to contractions of the southeastern and southwestern margins of the IPWP, associated with the more northerly position of the Inter-tropical Convergence Zone (ITCZ) that accompanied mid-Holocene strengthening of the Asian summer monsoon. Conversely, intervals of abrupt warming appear to correspond with widespread episodes of monsoon weakening and accompanying southward migrations of the ITCZ that caused the IPWP to expand beyond our coral sites. Intervals of a strengthened Asian monsoon and cooling in the southwestern IPWP during the mid-Holocene appear to correspond with a more positive Indian Ocean Dipole (IOD)-like mean configuration across the tropical Indian Ocean, suggesting that the Asian monsoon-IOD interaction that exists at interannual time scales also persists over centennial to millennial scales. Associated mean changes in the Pacific ENSO modes may have also occurred during the mid-Holocene. The dynamic and inter-connected behaviour of the IPWP with tropical climate systems during the mid-Holocene highlights the fundamental importance of the warm pool region for understanding climate change throughout the tropics and beyond. (C) 2009 Elsevier Ltd. All rights reserved.
学科主题	Geography, Physical ; Geosciences, Multidisciplinary
URL标识	查看原文
公开日期	2011-07-14
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/8407]
专题	南海海洋研究所_海洋科技动态信息-印太暖池系统研究
通讯作者	nabr@bas.ac.uk
推荐引用方式 GB/T 7714	Hantoro, WS,Abram, NJ,McGregor, HV,et al. Oscillations in the southern extent of the Indo-Pacific Warm Pool during the mid-Holocene[J]. QUATERNARY SCIENCE REVIEWS,2009,28(25-26):2794-2803.
APA	Hantoro, WS,Abram, NJ,McGregor, HV,Suwargadi, BW,Gagan, MK,&nabr@bas.ac.uk.(2009).Oscillations in the southern extent of the Indo-Pacific Warm Pool during the mid-Holocene.QUATERNARY SCIENCE REVIEWS,28(25-26),2794-2803.
MLA	Hantoro, WS,et al."Oscillations in the southern extent of the Indo-Pacific Warm Pool during the mid-Holocene".QUATERNARY SCIENCE REVIEWS 28.25-26(2009):2794-2803.