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.
出处
《热带气象学报》
CSCD
北大核心
2004年第1期106-112,共7页
Journal of Tropical Meteorology
关键词
广州市雷暴日
距平流场
相关分析
thunderstorm days of Guangzhou city
anomalous stream field
correlative analysis
