丽江机场雷暴天气特征分析

Analysis of Characteristics of Lijiang Airport Thunderstorm Weather

本文基于丽江机场最近9年(2007~2015年)的观测资料,总结了丽江机场雷暴发生、变化的特征和规律。结果表明:丽江机场近年来年雷暴日数稳定在60d左右,多发生在6~9月,总概率密度达到了82.3%,峰值出现在8月。平均雷暴初终日在4月13日和10月20日,平均间隔190d。从日变化看,雷暴多发生在15~19时,总概率密度达到了48.7%,峰值出现在16时,持续时间在0~1h内的最多,占总数的58.7%。雷暴发生规律除日变化外与水汽(相对湿度)基本一致,雨季午后53%~57%的相对湿度对雷暴的发生有一定的指示意义。雷暴发生次数波动较大的时段为午后到深夜,打夜雷的情况有所增多,夜雷多为系统性雷暴,对丽江机场的航班影响较大。

Based on the observations of lijiang airport in recent nine years （2007 -2015 ） ,this paper summarizes the characteristics and patterns of thunderstorms and changes in lijiang airport. The results showed that the number of thunder-storms in lijiang airport in recent years was stable at around 60d, and the total probability density reached 82. 3% in June and September, and the peak occurred in August. The average thunderstorm was on April 13th and October 20th, with an average of 190d. Look from daily variation, thunderstorms tend to occur in the 15 to 19, reached 48. 7% , total probability density peak appeared in the 16th, duration within 0 ？l h , 58. 7% of the total. Thunderstorm outside change regularity ChuRi with water vapor （relative humidity） , 53% ~57% relative humidity on rainy afternoon thunderstorm has the certain instruction signifi-cance. Thunderstorms in the number of volatile session for the afternoon late into the night, a night of ray conditions have in-creased ,night Laredo for systemic thunderstorms, larger influence on lijiang airport flight.