Glacial to Holocene surface hydrography of the tropical eastern Indian Ocean

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

	Glacial to Holocene surface hydrography of the tropical eastern Indian Ocean
	Mohtadi, M ; Steinke, S ; Luckge, A ; Groeneveld, J ; Hathorne, EC
刊名	EARTH AND PLANETARY SCIENCE LETTERS
	2010
卷号	292 期号:40545 页码:89-97
关键词	Indian Ocean Indonesia foraminifera oxygen isotopes Mg/Ca seawater delta 18O
ISSN号	0012-821X
通讯作者	mohtadi@uni-bremen.de
中文摘要	Quantifying the spatial and temporal sea surface temperature (SST) and salinity changes of the Indo-Pacific Warm Pool is essential to understand the role of this region in connection with abrupt climate changes particularly during the last deglaciation. In this study we reconstruct SST and seawater delta O-18 of the tropical eastern Indian Ocean for the past 40,000 years from two sediment cores (GeoB 10029-4, 1 degrees 30'S, 100 degrees 08'E, and GeoB 10038-4, 5 degrees 56'S, 103 degrees 15'E) retrieved offshore Sumatra. Our results show that annual mean SSTs increased about 2-3 degrees C at 19,000 years ago and exhibited southern hemisphere-like timing and pattern during the last deglaciation. Our SST records together with other Mg/Ca-based SST reconstructions around Indonesia do not track the monsoon variation since the last glacial period, as recorded by terrestrial monsoon archives. However, the spatial SST heterogeneity might be a result of changing monsoon intensity that shifts either the annual mean SSTs or the seasonality of G. ruber towards the warmer or the cooler season at different locations. Seawater delta O-18 reconstructions north of the equator suggest fresher surface conditions during the last glacial and track the northern high-latitude climate change during the last deglaciation. In contrast, seawater delta O-18 records south of the equator do not show a significant difference between the last glacial period and the Holocene, and lack Bolling-Allerod and Younger Dryas periods suggestive of additional controls on annual mean surface hydrology in this part of the Indo-Pacific Warm Pool. (c) 2010 Elsevier B.V. All rights reserved.
学科主题	Geochemistry & Geophysics
收录类别	SCI
原文出处	ELSEVIER SCIENCE BV
公开日期	2011-07-14
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/8403]
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
推荐引用方式 GB/T 7714	Mohtadi, M,Steinke, S,Luckge, A,et al. Glacial to Holocene surface hydrography of the tropical eastern Indian Ocean[J]. EARTH AND PLANETARY SCIENCE LETTERS,2010,292(40545):89-97.
APA	Mohtadi, M,Steinke, S,Luckge, A,Groeneveld, J,&Hathorne, EC.(2010).Glacial to Holocene surface hydrography of the tropical eastern Indian Ocean.EARTH AND PLANETARY SCIENCE LETTERS,292(40545),89-97.
MLA	Mohtadi, M,et al."Glacial to Holocene surface hydrography of the tropical eastern Indian Ocean".EARTH AND PLANETARY SCIENCE LETTERS 292.40545(2010):89-97.