摘要
根据珠海市1978—2007年雷暴监测资料和广东省1999—2006年闪电定位资料,采用了数理统计、小波分析等方法,分析了珠海市雷暴的气候特征。结果表明,近30年来珠海雷暴日数呈波动下降趋势,平均每10年减少3.08 d,全年各月均可能发生雷暴,主要集中在4—9月,约占全年的90%以上,83%的雷暴发生在白天,以13:00—15:00最活跃,约占总雷暴日数的28.9%,雷暴日数存在13~19年的震荡周期,地闪主要分布在珠海的西北-西-西南部、东北部,高空槽和副热带高压形势下,雷暴天气出现最多。
Based on the data of thunderstorms detected in Zhuhai City from 1978 to 2007 and the data of lightning located in Guangdong province from 1999 to 2006 and with the methods of numerical statistics and wavelet analysis,this work studies the climatological characteristics of thunderstorms in Zhuhai city. As shown in the result,the number of days with thunderstorms shows a tendency of decreasing in cascade for the past 30 years,or by a rate of 3. 08 d every 10 years. It is also indicated that thunderstorms may happen in every month of the year but concentrate in April-September,which takes up more than 90% of the yearly total. 83% of the thunderstorms take place during the daytime and are most active at 13: 00—15: 00,or about28. 9% of the total number of the thunderstorms. An oscillatory period of 13 ~ 19 years is found in the number of thunderstorms. Ground lightning is mainly seen in the northwest-west-southwest and the northeast of the city. The thunderstorm weather occurs most under the joint effect of upper-level troughs and the subtropical high.
出处
《广东气象》
2014年第2期36-39,共4页
Guangdong Meteorology
关键词
气候学
雷暴
气候倾向率
小波分析
珠海市
climatology
thunderstorm
climate tendency rate
wavelet analysis
Zhuhai city