摘要
根据田阳1959—2008年雷暴资料回归统计,采用气候倾向率和气候趋势系数进行雷暴特征分析。结果表明:近50 a田阳年雷暴日呈增加趋势,初雷日明显提前,终雷日稍有后延。逐月平均雷暴分布与月平均气温、月降水量呈同相单峰形,8月雷暴出现高峰值,9月雷暴呈锐减。雷暴日夏季多于春季,秋冬季少于春季,汛期4—9月雷暴日占90%。雷暴时段分布,以14—20时出现频率为最高,20—08时出现频率次之,08—14时出现频率最低。研究结果可为国民经济建设和防雷工程设计、雷击风险评估及雷电灾害防御与管理工作提供科学参考。
Based on thunderstorm data from 1959 to 2008 in Tianyang,the characteristics of thunderstorm were analyzed by climate trend rate method and climate trend coefficient method.The results show that thunderstorm day increases in the recent 50 years in Tianyang.The first thunderstorm day is ahead and the last thunderstorm day delays.Monthly characteristics of thunderstorm day are similar to those of air temperature and precipitation.Thunderstorm day is the most in August,and then decreases obviously in September.Thunderstorm day is more in summer than in spring,and less in autumn and winter than in spring.Thunderstorm day during April to September（rainy period） accounts for 90% of the total.Thunderstorm often occurs during 14：00 to 20：00,then during 20：00 to 08：00,yet seldom during 08：00 to 14：00.This study can provide references for thunderstorm and lightning protection and so on.
出处
《气象与环境学报》
2010年第5期61-63,共3页
Journal of Meteorology and Environment
关键词
广西田阳
雷暴日
气候特征
Tianyang of Guangxi province
Thunderstorm day
Climate characteristics
