2012年包头地区2次暴雨天气过程对比分析

通过对包头地区2次暴雨发生时主要影响系统、各种物理量场、地形特征等综合对比分析得出,2次暴雨都发生在500h Pa高空槽前西南气流里,并且在850h Pa切变线附近。2012年6月27日暴雨是高空槽前的正涡度平流与低层切变辐合上升气流叠加引发的。7月20日暴雨是由地面冷锋触发高能区内的不稳定能量释放产生的夜间强对流暴雨。地形强迫抬升对暴雨的发生也起了重要作用。

Contrastive Analysis of Two Rainstorm Weather Process in Baotou in 2012

Based on the Baotou two event occurred when the main influencing system, all kinds of physical quantity field characteristics, terrain features such as the comprehensive comparative analysis, the two of rainstorm occurred in 500 hPa SW in upper air, and in the 850 hPa shear line. June 27 th rain is still before the DES Voeux updraft and low level shear line and upper and lower stacking and increased flow caused by rainstorm. July 20 th rain is ground by cold front trigger energy instability within the energy generated by the release of strong convection storm at night. Topographic forcing uplifting was beneficial to the occurrence of heavy rain.