云南雷暴的时空分布特征分析  

A Study on Characteristics of Spatio-Temporal Distribution of Thunderstorm in Yunnan

作　　者：尹丽云[1] 许迎杰[2] 张腾飞[2] 刘雪涛[2] 谢屹然[2] 徐开[2] 

机构地区：[1]南京大学大气科学系,江苏南京210093 [2]云南省气象局雷电中心,云南昆明650034

出　　处：《灾害学》2007年第2期87-92,共6页Journal of Catastrophology

基　　金：2006年中国气象局多轨道研究型业务<云南省雷电监测预警系统的研究开发>专项;2006年云南省气象局业务研究<低纬高原雷电探测资料应用和预报方法研究>专项资助

摘　　要：利用1971-2005年云南132个气象站的逐日气象观测资料,对云南雷暴的时间、空间分布特点和变化特征进行分析研究,运用保证率公式计算了云南不同地区的雷暴可能初终日时空分布。分析结果表明：云南雷暴天气35年来在波动中呈减少趋势,年平均雷暴日滇西北最少,滇西南最多。滇东北、滇西北雷暴初日开始较晚,雷暴终日结束较早。全省雷暴集中发生在4-9月。全省雷暴日变化基本相同,呈两峰一谷的变化趋势,最大峰值发生在午后14-22时。Based on daily weather data recorded at 132 weather stations from 1971 to 2005 in Yunnan, the characteristics of spatio-temporal distribution of thunderstorm are analyzed. The spatio-temporal distribution of initial and ending days of thunderstorm in each district are calculated by assurance formula The results indicate that the thunderstorms have decreased with fluctuation since 1971. The annual-average thunderstorm days are the least in north-east region of Yunnan province and the most in the south-east region. The initial days of thunderstorm in north-east region and north-west region of Yunnan province are later than that in the other regions and ending days of thunderstorm in both regions are earlier. The thunderstorm days mainly occur from April to September. The diurnal variation of thunderstorms in Yunnan is almost same. It shows a two-peak-one-valley trend. The peaks are in the time period from 14：00 to 22：00PM .

关 键 词：雷暴 分布特征 云南 

分 类 号：P446[天文地球—大气科学及气象学]