2017年贵州中西部冰雹流型识别和物理量特征检验

Hail flow pattern identification and physical characteristics test in midwest of Guizhou in 2017

该文对2017年贵州中西部发生的7次冰雹天气过程进行了环流划分和特征物理量分析,并与文献[1]的环流划分方法和物理量指标做了比较,结果表明环流分型方法基本适用于贵州中西部的冰雹天气,大气层结背景如0℃层、-20℃层高度,层结温差,CAPE等与标准有一致的地方,也有不一致的地方,说明原有的物理量阈值有可改进的地方。采用NCEP1°×1°再分析资料,对冰雹发生最近时刻的环境潜势物理量特征的分析发现,各型对流性天气物理量有着共同的特征,且物理量的强度、配置等对于产生对流性天气的强度、种类有一定的指示作用。

In this paper,the circulation and physical characteristics of 7 Hail Events in Midwest of Guizhou in2017 were analyzed. The results show that the method of circulation type partitioning method from Wan Xueli et.are suitable for hail weather in Mid-Western Guizhou. The analysis of atmosphere background and physical quantities showed that such as 0 ℃ layer,-20 ℃ layer,temperature difference between upper and lower layers,CAPE,etc,where there is agreement with the standard,also there are inconsistencies. This indicates that the original physical quantity threshold should be improved. Using NCEP1° × 1° re-analysis data,several other physical characteristics of environmental potential in the recent time of hail occurrence was analyzed. The result show that the characteristics of the physical quantity of convective weather were basically common,the intensity and disposition of physical quantity have certain indication effect on the intensity and type of convective weather.