【摘要】 利用常规观测资料及NCEP/GFS再分析资料,对2010年1月5—6日发生在湖北东部的暴雪过程进行中尺度分析。结果表明:500hPa北支槽后干冷空气配合南支槽前西南暖湿气流形成的冷暖交汇以及850hPa低涡北抬发展是产生暴雪的主要天气背景;200hPa高空急流、700 hPa西南急流、925hPa东北气流、850hPa气流汇合区、700hPa及850hPa露点锋、锋生次级环流、风向随高度强烈顺转的垂直风切变以及地面中尺度辐合区的有利空间配置,对暴雪预报具有重要指示意义。此外,在上述研究的基础上对此次暴雪过程的三维物理模型进行了总结。更多还原

【Abstract】 Based on conventional surface and upper data and reanalysis data from NCEP/GFS,a meso-scale analysis of a snowstorm occurred in the eastern Hubei province from January 5 to 6 in 2010 was made.The results show the following.It is the main synoptic background to generate the snowstorm that dry and cold air behind northern branch trough joins southwest warm and wet airflow in front of southern branch trough at 500 hPa and low vortex at 850 hPa moves eastward and develops.The favorable spatial configuration of synoptic systems has a significant prediction indication for snowstorm forecast including upper jet at 200 hPa,southwest jet at 700 hPa,the Northeast China jet at 925 hPa,convergence zone at 850 hPa,dew-point front at 700 hPa and 850 hPa,secondary circulation caused by frontogenesis,vertical wind shear that the wind rotated clockwise strongly with altitude and mesoscale convergence zone in ground layer.In addition,three-dimensional physical model of the snowstorm event is summarized based on the above researches.更多还原