辽宁强对流天气物理量阈值探索统计分析

A Statistic Analysis of the Threshold Value of Strong Convection Weather Physical Quantity in Liaoning

通过对2003—2011年辽宁省强对流天气探空曲线数据文件进行空间及时间构建,使用MICAPS软件计算统计各物理量参数值,总结了这些物理量参数值在各类强对流天气的分布区间,确定了强对流天气类型判断阈值,其中短时暴雨和冰雹天气的A指数(A)、整层比湿积分(IQ)、K指数(K)、沙氏指数(SI)、0℃高度(H0)和-20℃层高度(H-20)六种物理量参数值有明显的区别,雷雨大风天气介于短时暴雨和冰雹天气之间,且参数值与两种天气都有较大的交叉。对三类天气的A、IQ和K的对比分析表明,短时暴雨天气的水汽条件明显要高于冰雹天气,说明暴雨对水汽的依赖比冰雹天气较高。对比分析H0和H-20,发现冰雹天气的参数值明显低于暴雨天气。发生冰雹天气的SI高于暴雨天气。

Based on Liaoning Province from 2003 to 2011 in strong convective weather sounding curve data ifles for building space and time to get the sounding station sounding curve changes in sounding data ifle, using MICAPS software calculation for each physical quantity parameter values, the physical distribution range of parameter values in all kinds of strong convective weather is summed up, determining the threshold value based on strong convective weather patterns. In terms of short time of heavy rain and the hail weather index (A), Integral Q (IQ), K Index (K), Showalter Index (SI), zero layer height (H0), 20 degrees below zero height (H-20), the six kinds of physical quantity parameter values have obvious differences. Strong wind weather between short-term rainstorm and hail weather, and its parameter values with two kinds of weather have comparatively large cross connections: (1) analyzingA ,IQ,Kof three kinds of weather, it is shown that the water vapor of the short-time heavy rain conditions is signiifcantly higher than that of hail weather, and the heavy rain that depends on water vapor than the hail weather is higher; (2) from theH0,H-20 comparing and analyzing the two kinds of physical parameter values of hail weather, the parameter value was lower than that of heavy rain; (3) the hail weatherSI is higher than the stormy weather.