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利用2009年8月15—22日各层(500hPa、700hPa、850hPa)天气图资料及有关物理量资料,采取天气诊断分析方法,对汉中市2009年8月16—22日的连阴雨、暴雨天气过程进行分析。结果表明:此次过程主要影响系统为副高、高空冷涡、低涡、切变和700hPa低空急流,700hPa低空急流为暴雨区源源不断地输送了水汽和不稳定能量;物理量场对降水,尤其是对大降水落区及量级的预报具有很好的指示作用。
Based on weather data of all layers (500hPa, 700hPa, 850hPa) and related physical quantities from August 15 to August 22, 2009, a weather diagnosis and analysis method was used to analyze the heavy rainy weather in Hanzhong from August 16 to August 22, 2009 analysis. The results show that this process mainly affects the subsurface, upper-level cold vortex, low vortex, shear and low-level jet stream at 700 hPa. The low-level jet stream at 700 hPa conveys water vapor and unsteady energy into the rainstorm area continually. It has a good indication of the prediction of heavy rainfall areas and magnitude.