The decline of winter monsoon velocity in the South China Sea through the 20th century: Evidence from the Sr/Ca records in corals

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	The decline of winter monsoon velocity in the South China Sea through the 20th century: Evidence from the Sr/Ca records in corals
	Liu, Y ; Peng, ZC ; Chen, TG ; Wei, GJ ; Sun, WD ; Sun, RY ; He, JF ; Liu, GJ ; Chou, CL ; Zartman, RE
刊名	GLOBAL AND PLANETARY CHANGE
	2008
卷号	63 期号:1 页码:79-85
关键词	coral Sr/Ca ratio East Asian monsoon South China Sea globe warming Kuroshio Current
ISSN号	0921-8181
通讯作者	gee@mail.ustc.edu.cn
中文摘要	A modern massive Porites coral was collected from the Longwan Bay (19 degrees 20'N, 110 degrees 39'E) on the east coast of the Hainan Island, China. The coral was sectioned vertical to the growth axis into discs of double density-bands representing annual growth. The samples were analyzed for the Sr/Ca ratio by inductively coupled plasma atomic emission spectrometry. The history of winter sea-surface temperature (SST) is reconstructed using the Sr/Ca ratio in winter bands of corals. The winter SST at Xisha in the middle of the South China Sea (SCS) is weakly correlated with the instrument-measured winter monsoon velocity (WMV) with a correlation coefficient of 0.19. The winter SST data from corals at Longwan Bay, Hainan, in the northern SCS are moderately correlated with the WMV (r=0.40). Interestingly we found that the difference of winter SSTs between the two sites (Xisha and Longwan Bay, Hainan) (the X-H index) is significantly negatively correlated with the WMV (r=-0.73). This negative correlation may be related to the intrusion of the warm Kuroshio Current into the SCS through the Luzon Strait promoted by the strong northeastern monsoon winds in the winter. Using the relationship between our coralline data and observed WMV, the calculated winter monsoon velocity (WMVc) was obtained for 87 years. This data set in combination with the instrument-measured data between 1993 and 1998 generate a record of WMVc for a period of 93 years from 1906 to 1998. The WMVc in the 20th century shows significant interannual and decadal variability with a trend of persistent decline in the whole 20th century at the rate of decrease of -0.02 (m/s)/a. The lowest wind velocity occurred during the last two decades of the 20th century. The WMVc has decreased significantly by about 30% from the early to the late of 20th century. The 20th century decline of winter monsoon velocity evidenced from the SCS coral records is consistent with the atmosphere-ocean general circulation models (AOGCMs) simulations for monsoon response to increasing temperatures. In addition, an obvious decline shift of WMV around 1976 can be seen in both instrumental and proxy records and it coincides with many other Pacific records. This shift is likely to correspond to a Pacific-wide change in the Pacific Decadal Oscillation occurring at the same time. (C) 2008 Elsevier B.V. All rights reserved.
学科主题	Geography, Physical; Geosciences, Multidisciplinary
收录类别	SCI
原文出处	AUG
WOS记录号	WOS:000259429300008
公开日期	2011-07-03
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/4530]
专题	南海海洋研究所_中科院边缘海地质重点实验室
推荐引用方式 GB/T 7714	Liu, Y,Peng, ZC,Chen, TG,et al. The decline of winter monsoon velocity in the South China Sea through the 20th century: Evidence from the Sr/Ca records in corals[J]. GLOBAL AND PLANETARY CHANGE,2008,63(1):79-85.
APA	Liu, Y.,Peng, ZC.,Chen, TG.,Wei, GJ.,Sun, WD.,...&Zartman, RE.(2008).The decline of winter monsoon velocity in the South China Sea through the 20th century: Evidence from the Sr/Ca records in corals.GLOBAL AND PLANETARY CHANGE,63(1),79-85.
MLA	Liu, Y,et al."The decline of winter monsoon velocity in the South China Sea through the 20th century: Evidence from the Sr/Ca records in corals".GLOBAL AND PLANETARY CHANGE 63.1(2008):79-85.