首页|近二十年南海表层海水的盐度淡化及其机制

近二十年南海表层海水的盐度淡化及其机制

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  • NETL
  • NSTL
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南海北部航次观测资料显示南海北部表层盐度在2004—2012年期间缓慢降低,2012年盐度达到最低.客观分析数据EN4(the UK Met Office EN.4.0.2 objective analyses)以及OFES(ocean general circulation model for the Earth Simulator)模式结果都显示南海表层海水盐度在1993—2014年有淡化趋势,最显著区域位于吕宋岛以西和南海南部.盐度收支分析表明淡水强迫在吕宋岛以西海域起主要贡献,而水平平流输运主导南海西部的表层盐度变化.吕宋岛以西表层盐度的降低与近年来沃克环流加强引起的夏季强降雨增加有关.
The freshening trend of surface salinity in the South China Sea in recent two decades and its mechanism
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.

South China Seasea surface salinity variabilityfresheningprecipitationhorizontal salinity advectionair-sea interaction

傅圆圆、程旭华、张玉红、严幼芳、杜岩

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热带海洋环境国家重点实验室(中国科学院南海海洋研究所),广东广州 510301

中国科学院大学,北京 100049

南海 表层盐度 淡化 降雨 水平平流 海气相互作用

国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金热带海洋环境国家重点实验室自主项目广州市珠江科技新星项目

41522601412309624127602541506019LTOZZ1501201506010036

2017

10.11978/2016101

热带海洋学报
中国科学院南海海洋研究所

热带海洋学报

CSTPCDCSCD北大核心
影响因子：0.513
ISSN：1009-5470
年,卷(期)：2017.36(4)
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