气象2012，Vol.38Issue(8)：921-931,11.
“2010．1．6”新疆北部特大暴雪过程中的锋面结构及降水机制
The Frontal Structure and Precipitation Mechanism in the 6 January 2010 Heavy Snowfall Event Happening in North Xinjiang
摘要
Abstract
Numerical simulation and diagnosis are applied to the heavy snow event happening during 6--7 January 2010 in North Xinjiang by using WRF model. The combination of the cold vortex near Balkhash Lake and the south moving trough from North Xinjiang, as well as the propagationand developing of the upper-air jet was the key process connected with this serious blizzard. The synoptical conceptual xnodel is set up for this heavy snow event. It is revealed through the diagnosis of temperature advection and fronto- genesis function that, the mesoscale convergence in front of the topography led to the active contribution to the frontogenesis, and the vertical motion term in the frontogenesis function explained the most part of the active frontogenesis. The vertical movement due to the secondary circulation forced by the frontogenesis is the most importrant component through the frontogenesis secondary ciruculation diagnosis. Due to the to- pography effect the cold air was depositing before the mountain, and the front split into upper level part and lower part, and the change in the structure of front has obvious impact on the microphYsical process of precipitation. The relative light precipitation happening in the daytime of 6 January 2010 is closely connect-ed with the warm flow ascending along the topography and the stratus cloud in the upper level. After 20..00 BT 6 January, the warm advection was strengthened with distinct frontogenesis, the seeder feeder mechanism was formed by the split front structure, and the snowfall intensified clearly due to this more ef- ficient microphysical process.关键词
暴雪/锋生/地形作用/云微物理过程Key words
snow/frontogenesis/orographic effect/cloud microphysical process分类
天文与地球科学引用本文复制引用
陈涛,崔彩霞..“2010．1．6”新疆北部特大暴雪过程中的锋面结构及降水机制[J].气象,2012,38(8):921-931,11.基金项目
公益性行业（气象）科研专项（GYHY201106007）资助 （）
