2008年初我国南方低温冻雨灾害的气候特征

2008年初我国南方低温冻雨灾害的气候特征
王启;吴方
【期刊名称】《中国海洋大学学报（自然科学版）》
【年(卷),期】2012(042)003
【摘要】根据2008年初中国南方低温冻雨灾害发生的时间和范围定义了中国南方地表气温异常指数(STAI).研究表明,STAI与欧亚大陆的中、高纬度系统和太平洋副热带高压都有很好的相关性,并且中纬度系统在中层占优,高纬度系统在低层占优.根据STAI合成的典型冷(暖)年850和500 hPa欧亚大陆位势高度异常场呈“北正南负”(“南正北负”)型,西太平洋副热带高压减弱(加强),我国南方水汽主要来源于孟加拉湾(南海).2008年STrAI的前期大气环流背景既具有典型冷年的特征:欧亚大陆位势高度异常呈“北正南负”型;又具有典型暖年的特征:西太平洋副热带高压显著增强,中国南方水汽同时来源于孟加拉湾和南海.%According to the time and region of the low temperature and freezing rain disaster happened in Southern China in early 2008, the surface temperature anomaly index (STAI) was defined. It was found that there were close correlations between STAI and hgt anomalies in Eurasia, as well as in the Western Pacific. In the middle layer the dominant correlation area happened at mid-latitude, while in the lower layer happened at high-latitude. In typical cold (warm) year: (1) the distribution of the hgt anomalies in Eurasia has a type of northern positive and southern negative' (' southern positive and northern negative') ; (2) the WPSH is weak (strong) ; (3) the vapor mainly comes from the Bay of Bengal (South China Sea). In early 2008, the background
general circulation of STAI has both character of typical cold year: hgt anomalies in Eurasia is northern positive and southern negative' , and character of typical warm year:the WPSH is significantly enhanced, and the vapor comes from both the Bay of Bengal and South China Sea.
【总页数】9页(P1-9)
【作者】王启;吴方
【作者单位】中国海洋大学物理海洋教育部重点实验室,山东省高校海洋-大气相互作用与气候重点实验室,山东青岛266100;中国海洋大学物理海洋教育部重点实验室,山东省高校海洋-大气相互作用与气候重点实验室,山东青岛266100
【正文语种】中文
【中图分类】P468.0+24
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