阿荣旗短时强降水的环流背景和物理量场特征分析

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作者简介 赵岳冀（1988—），女，黑龙江讷河人，工程师，主要从事生态气象服务工作。*通信作者：陈高娃（1983—），女，内蒙古阿荣旗人，工程师，主要从事预报预测工作，E-mail：282693821@qq.com。

收稿日期 2023-06-30

Analysis of Circulation Background and Physical Quantity Field Characteristics of Short-term Heavy Rainfall in Arong Banner

Zhao Yue-ji et al（ Hulunbuir Meteorological Bureau， Hulunbuir， Inner Mongolia 021000）

Abstract The main circulation background for generating short-term heavy precipitation is the high-altitude cold vortex and trough. Analyzing the physical quantity field of short-term heavy precipitation， it is found that the average specific humidity at 850 hPa and 700 hPa during the occurrence of short-term heavy precipitation was 6.00 and 9.50 g/kg， respectively. The average value of the entire layer of precipitable water was 20.50 mm， and the average value of the K index was 30.60 ℃. The coefficient of divergence was small and the degree of dispersion was small， which has a relatively good indicating significance for generating short-term heavy precipitation.

Key words Short-term heavy precipitation： Circulation background; Physical quantity field

摘要 产生短时强降水主要环流背景为高空冷涡和槽，分析短时强降水物理量场得出：发生短时强降水时850 hPa和700 hPa平均比湿分别6.00 和9.50 g/kg，平均整层可降水量为20.50 mm，K指数平均值为30.60 ℃，变异系数较小，离散程度小，对产生短时强降水有相对较好的指示意义。（剩余5532字）