东北冷涡影响下呼伦贝尔市一次强降雨天气过程成因浅析

Causes Analysis on a Strong Precipitation Weather Process Affected by Northeast Cold Vortex in Hulun Buir

文章通过对2011年6月2日16—22时呼伦贝尔市岭东地区一次强降雨天气过程的分析,揭示了该过程发生发展的成因。研究表明,东北冷涡是造成本次强降雨天气的主要影响系统,大兴安岭对来自东部、东南部暖湿气流的阻挡,在岭东地区产生大雨或暴雨天气。低空急流以及风场上切变的存在对南部水汽向我市源源不断地输送起重要作用。高低层温度平流的差异以及湿度平流的差异使得大气层结变得不稳定,有利于强对流天气的发生、发展。同时大致指出了短时强降雨天气预报的普遍思路,对今后的预报预测工作具有一定的指导意义。

This article revealed the occurrence and development causes of a severe rainfall weather process that happened in Lingdong region of Hulun Beier from 16：00 to 22：00 on June 02, 2011 by analysis. The results showed that the northeast cold vortex was the main influence system for this weather process. The barrier of the Greater Khingan Mountains to the warm and wet flow from eastern and southeast China more easily produced heavy rain or rainstorm weather. Low-level jet and existence of wind shear played important role for transporting southern vapor to Hu]unBuir city continuously. The differences of temperature and humidity advection in high-low layer made the atmospheric stratification becoming unstable, it was benifit to the occurrence and development of severe convective weather. This article also approximately point out some general ideas about short-time strong rainfall weather forecast, there are some guiding significances for forecast in future.