近二十年南海表层海水的盐度淡化及其机制*

doi:10.11978/2016101

Abstract

Abstract:

In situ hydrographic data of sea surface salinity (SSS) revealed a freshening trend in the northern South China Sea (SCS) during 2004—2012, which was the freshest in 2012. Such freshening was also found in the UK Met Office EN4 objective analysis product and the ocean general circulation model for the Earth Simulator (OFES) output during 1993-2014, particularly west of Luzon Island and in the southeastern SCS. The salinity budget analysis in the upper layer indicated that the fresh water forcing and horizontal salinity advection contributed to the trends of SSS west of Luzon Island and in the western SCS, respectively. The excessive precipitation in summer accounted for the decrease of SSS to a great extent west of Luzon Island, which was associated with the strengthening trend of the Walker Circulation.

Key words: South China Sea, sea surface salinity variability, freshening, precipitation, horizontal salinity advection, air-sea interaction

CLC Number:

P731.12

Yuanyuan FU, Xuhua CHENG, Yuhong ZHANG, Youfang YAN, Yan DU. The freshening trend of surface salinity in the South China Sea in recent two decades and its mechanism[J].Journal of Tropical Oceanography, 2017, 36(4): 18-24.

Figures/Tables 10

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References 21

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序号	资料	水平分辨率	变量
1	南海北部航次资料		盐度
2	EN4客观分析资料	1°×1°	盐度
3	Ishii资料	1°×1°	盐度
4	OFES资料	0.1°×0.1°	盐度、流速
5	GPCP资料	2.5°×2.5°	降雨量
6	ECMWF资料	1°×1°	蒸发
7	WOA13资料	1°×1°	盐度

The freshening trend of surface salinity in the South China Sea in recent two decades and its mechanism

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