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学科主题: Geography, Physical; Geosciences, Multidisciplinary
题名: Mid-late Holocene monsoon climate retrieved from seasonal Sr/Ca and delta O-18 records of Porites lutea corals at Leizhou Peninsula, northern coast of South China Sea
作者: Yu, KF ; Zhao, JX ; Wei, GJ ; Cheng, XR ; Wang, PX
通讯作者: kyu@earth.uq.edu.au ; j.zhao@uq.edu.au ; gjwei@gig.ac.cn ; xrchengk@online.sh.cn ; pxwang@online.sh.cn
关键词: Holocene ; SST ; East Asian monsoon ; coral delta O-18 and Sr/Ca ; South China Sea ; global warming
刊名: GLOBAL AND PLANETARY CHANGE
发表日期: 2005
卷: 47, 期:40578, 页:301-316
收录类别: sci
部门归属: Univ Queensland, Adv Ctr Isotope Res Excellence, Brisbane, Qld 4072, Australia; Chinese Acad Sci, S China Sea Inst Oceanol, Guangzhou 510301, Peoples R China; Tongji Univ, Lab Mar Geol, Shanghai 200092, Peoples R China; Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China
项目归属: 海洋地质
摘要: South China Sea (SCS) is a major moisture source region, providing summer monsoon rainfall throughout Mainland China, which accounts for more than 80% total precipitation in the region. We report seasonal to monthly resolution Sr/Ca and delta(18)O data for five Holocene and one modem Porites corals, each covering a growth history of 9-13 years. The results reveal a general decreasing trend in sea surface temperature (SST) in the SCS from similar to 6800 to 1500 years ago, despite shorter climatic cycles. Compared with the mean Sr/Ca-SST in the 1990s (24.8 degrees C), 10-year mean Sr/Ca-SSTs were 0.9-0.5 degrees C higher between 6.8 and 5.0 thousand years before present (ky BP), dropped to the present level by similar to 2.5 ky BP, and reached a low of 22.6 degrees C (2.2 degrees C lower) by similar to 1.5 ky BP. The summer Sr/Ca-SST maxima, which are more reliable due to faster summer-time growth rates and higher sampling resolution, follow the same trend, i.e. being 1-2 degrees C higher between 6.8 and 5.0 ky BP, dropping to the present level by -2.5 ky BP, and reaching a low of 28.7 degrees C (0.7 degrees C lower) by similar to 1.5 ky BP. Such a decline in SST is accompanied by a similar decrease in the amount of monsoon moisture transported out of South China Sea, resulting in a general decrease in the seawater delta(18)O values, reflected by offsets of mean 6 180 relative to that in the 1990s. This observation is consistent with general weakening of the East Asian summer monsoon since early Holocene, in response to a continuous decline in solar radiation, which was also found in pollen, lake-level and loess/paleosol records throughout Mainland China. The climatic conditions similar to 2.5 and similar to 1.5 ky ago were also recorded in Chinese history. In contrast with the general cooling trend of the monsoon climate in East Asia, SST increased dramatically in recent time, with that in the 1990s being 2.2 degrees C warmer than that similar to 1.5 ky ago. This clearly indicates that the increase in the concentration of anthropogenic greenhouse gases played a dominant role in recent global warming, which reversed the natural climatic trend in East Asian monsoon regime. (c) 2004 Elsevier B.V. All rights reserved.
WOS记录号: WOS:000231753100021
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/4854
Appears in Collections:中科院边缘海地质重点实验室_期刊论文

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Yu, KF; Zhao, JX; Wei, GJ; Cheng, XR; Wang, PX.Mid-late Holocene monsoon climate retrieved from seasonal Sr/Ca and delta O-18 records of Porites lutea corals at Leizhou Peninsula, northern coast of South China Sea,GLOBAL AND PLANETARY CHANGE,2005,47(40578):301-316
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