主办单位：中国气象局沈阳大气环境研究所
国际刊号：ISSN 1673-503X
国内刊号：CN 21-1531/P
气象与环境学报

气象与环境学报 ›› 2012, Vol. 28 ›› Issue (1): 38-42.doi:

• 论文 • 上一篇    下一篇

汕头雷暴日异常的环流背景分析

甘庆辉  许薇  汤强   

  1. 汕头市气象局，广东 汕头 515041
  • 出版日期:2012-02-28 发布日期:2012-02-28

Circulation background of thunderstorm day anomaly in Shantou, Guangdong province

GAN Qing-hui XU Wei TANG Qiang   

  1. Shantou Meteorological Service, Shantou 515041, China
  • Online:2012-02-28 Published:2012-02-28

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摘要： 利用1951—2010年汕头气候观象台逐日雷暴资料和NCEP/NCAR月平均再分析资料，分析了汕头雷暴日的气候特征及雷暴日异常的环流背景。结果表明：汕头雷暴主要集中在4—9月，6月雷暴最多。近60a，汕头雷暴日呈显著的下降趋势，在1978年发生突变；汕头雷暴日存在多尺度振荡，主周期为25a；500 hPa上贝加尔湖高脊、北方槽、南支槽和副热带高压的异常变化，是导致汕头雷暴日异常的环流系统,并且这些系统在雷暴日偏多、偏少年具有相反的变化特征。850hPa上，在雷暴日偏多年，副热带西太平洋和孟加拉湾向汕头水汽输送明显增加；偏少年基本相反。

关键词: 汕头雷暴日, 气候特征, 环流背景, 汕头, 雷暴日, 气候特征, 环流背景

Abstract: Based on the daily thunderstorm data and the monthly NCEP/NCAR reanalysis data from 1951 to 2010 in Shantou, the climate characteristics of thunderstorm day and circulation background of thunderstorm day anomaly were analyzed. The results indicate that the thunderstorm day mainly appears from April to September, especially in June. It is in a decreasing trend in recent 60 years, and there is an abrupt change in 1978. The thunderstorm day has multi-scale oscillations, and the main cycle is 25 years. The anomalies of ridge at the Baikal Lake, northern trough, southern trough and subtropical high at 500 hPa result in the abnormal circulation systems of thunderstorm day, and the changes of these systems are contrary in more and fewer years of thunderstorm days. The vapor transportation to Shantou from the subtropical western Pacific and the Bay of Bengal is strong at 850 hPa in more years of thunderstorm days, while it is contrary in fewer years of thunderstorm days.

Key words: thunderstorm days of Shantou, circulation background, Shantou, Thunderstorm day, Climate characteristics, Circulation background