成都双流机场近5年短时强降水特征分析

Characteristics of Flash Heavy Rain in Chengdu Shuangliu Airport in Recent 5 Years

利用2015至2019年双流机场的例行天气报告(METAR)、特殊天气报告(SPECI)、民航气象地面观测薄纪要栏资料以及温江站探空资料,结合民航气象地面观测规则对双流机场短时强降水进行统计分析,采用分类散点图,对发生在双流机场的短时强降水过程的临近时次探空物理量(整层垂直比湿积分IQ、K指数、SI指数、CAPE、θse850 hPa、θse850 hPa − 500 hPa、850 hPa比湿q、850 hPa气温T等)进行分析,得到了不同季节短时强降水过程临近时次探空物理量的参数阈值,在临近预报中为预报员分析判断降水强度提供参考依据。

Based on the routine weather report (METAR), special weather report (SPECI), the summary column of the civil aviation meteorological ground observation book of Shuangliu Airport from 2015 to 2019, and sounding data of Wenjiang station, combined with the civil aviation meteorological ground observation rules, makes a statistical analysis on the flash heavy rain of Shuangliu Airport, and uses the classified scatter diagram to analyze the near time sounding physical quantities of flash heavy rain processes in Shuangliu Airport (vertical specific humidity integral IQ, K index, SI index, Cape, θse850 hPa, θse850 hPa − 500 hPa, 850 hPa specific humidity q, 850 hPa temperature T, etc.) are analyzed, and the parameter thresholds of radiosonde physical quantities in the near time of flash heavy rain process with different intensities in different seasons are obtained, which provides a reference basis for forecasters to analyze and judge the precipitation intensity.