东海黑潮温、盐度与中国东部气温和降水的相互关系  

Relationship Between the Kuroshio Temperature and Salinity in the East China Sea and the Air Temperature and Precipitation in the East China

作　　者：吴志彦[1] 闵锦忠[1] 陈红霞[2] 刘娜[2] 

机构地区：[1]南京信息工程大学江苏省气象灾害重点实验室,江苏南京210044 [2]国家海洋局第一海洋研究所

出　　处：《海洋科学进展》2008年第2期156-162,共7页Advances in Marine Science

基　　金：国家自然科学基金项目--南极绕极流多核结构及其时空变化的动力机制研究(40506011);国家自然科学基金重点项目--东亚夏季风与我国东部夏季降水年代变化的诊断与模拟(40331010);江苏省高校自然科学重大基础研究项目--长江中下游旱涝灾害演变规律及其预测理论研究(05KJA17002)

摘　　要：采用东海黑潮主流段长时间序列的实测温盐资料,研究了东海黑潮上层温度、上层盐度的变化及其与中国东部降水和地面气温的关系。结果表明,在过去50 a内,东海黑潮上层海温呈上升趋势,而上层盐度略呈下降趋势。东海黑潮上层海温和我国东部地面气温的关系在冬季十分密切,呈现出大面积显著的正相关,这与冬季南下冷空气的整体降温作用有关。夏季,长江中下游江水的增多致使大量长江冲淡水入海,可能是导致黑潮上层水盐度下降的一个原因,此时东海黑潮上层盐度与我国大陆东部降水呈负相关。In this paper, the observed Kuroshio temperature and salinity data in the East China Sea are used to study the relationship between the Kuroshio upper layer temperature and Salinity in the East China Sea and the precipitation and ground air temperature in the East China. It is shown from the study results that in the past 50 years, the Kuroshio upper layer temperature in the East China Sea showed an increasing trend, and the Kuroshio upper layer salinity showed a decreasing trend. In winter, the Kuroshio upper layer temperature in the East China Sea is closely related with the ground air temperature in the East China, which is related to the cooling effect of cold air going down to the south in winter. In summer, the Kuroshio upper layer salinity is negatively correlated with the precipitation in the East China, and the cause for this may be that the massive Changjiang River diluted water in summer flows into the sea to result in the decrease in the Kuroshio upper layer salinity.

关 键 词：东海 黑潮 气候 中国东部 

分 类 号：P731.27[天文地球—海洋科学]