沙漠与绿洲气象2012，Vol.6Issue(5)：7-11,5.
湿位涡在一次北疆暴雪天气中的应用
Application of Moist Potential Vorticity for a Snowstorm Forecast in Northern Xinjiang
摘要
Abstract
Based on the observed data and the reanalysis dataset from the NCEP/NCAR reanalysis project, the mechanism of a snowstorm happened on February 22-24, 2010 in Northern Xinjiang was studied. The circulation,low-level wind,pseudo-equivalent potential temperature and moist potential vorticity. Were andyzed the results showed that the synodic motion of polar front zone and subtropical front zone in Xinjiang is the main reason of the snow storm.The convergence in the low layer provided enough dynamic conditions for the blizzard.The cold air from the polar front zone and the vertical wind shear over the Xinjiang region provided unstable conditions for the blizzard. Blizzards often occur with big energy frontal zone in low-level atmosphere and near the negative center of the moist potential vorticity in 700 hPa, the area of blizzard. which can be a reference designator to forcasting关键词
暴雪/假相当位温/能量锋区/湿位涡Key words
snowstorm/pseudo-equivalent potential temperature/energy fi'ontal zone/moist potentialvorticity分类
天文与地球科学引用本文复制引用
吕新生,王莹,李圆圆,唐冶,杨霞..湿位涡在一次北疆暴雪天气中的应用[J].沙漠与绿洲气象,2012,6(5):7-11,5.基金项目
公益性行业（气象）科研专项（GYHY201106007）. （）
