广州市雷暴日异常的基本气候特征及其与近海海温关系初探  

ON BASIC CLIMATE CHARACTERISTICS OF THUNDERSTORM DAYS ANOMALIES OF GUANGZHOU CITY AND PRELIMINARY DISCUSSION OF ITS RELATIONSHIP WITH SST OVER OFFSHORE WATERS IN

作　　者：陈绍东[1] 林奕峰[1] 区永平[1] 

机构地区：[1]广东省防雷中心,广东广州510080

出　　处：《热带气象学报》2004年第1期106-112,共7页Journal of Tropical Meteorology

摘　　要：分析了广州市雷暴日变化的基本气候特征。结果表明:广州市雷暴日主要集中在5～8月,占全年雷暴日总量的71.38%,雷暴日的季节分布具有双峰型的特征。近48年以来广州市雷暴日呈明显的下降趋势。广州市5～8月的雷暴日与同期850hPa大气环流的关系:多雷暴年整个亚洲中纬地区(35N)有明显的偏西风距平,南海及广东以及向北延伸的广大地区的西南及偏南气流盛行,少雷暴年则刚好相反。与近海海温做了简单的相关分析,得出:广州市雷暴日与前期4～6月印尼附近西太平洋海温呈负相关的变化趋势。The basic climate characteristics of Guangzhou抯 thunderstorm diurnal change are analyzed. The conclusions are as follows: Guangzhou抯 thunderstorm mainly occurs from May to August, with the its proportion to annual thunderstorm being 71.38 % and having the characteristics of two peaks of its seasonal distribution. The trend of total thunderstorm in Guangzhou city is descending. The relationship between thunderstorm days from May to August and corresponding 850 hPa atmospheric circulation is that: In more thunderstorm years obvious westerly exists in the middle latitude of Asia, southwesterly and southerly wind in the area of South China Sea and Guangdong and their extended northward region; in less thunderstorm years things are just the opposite. A simple correlative analysis of SST over offshore waters in China points out that negative correlation between thunderstorm and April～June SST over western Pacific near Indonesia is found.

关 键 词：广州市雷暴日 距平流场 相关分析 

分 类 号：P461.2[天文地球—大气科学及气象学]