气象Issue(12)：1446-1454,9.DOI:10.7519/j.issn.1000-0526.2014.12.003
一次暴雨与特大暴雪并存的华北强降水过程分析
Analysis on Severe Heavy Precipitation Event with Rainstorm and Large Blizzard in North China
摘要
Abstract
Based on conventional observations and NCEP 1°×1°reanalysis data,causes and precipitation type of the rain and snow weather process in North China during 3-4 November 2012 are analyzed.The results show that the deep low vortex and surface cyclone are the systems that directly impact the process. The southeast low-level j et transporting the abundant moisture from the eastern sea leads to the atmos-pheric precipitable water over the entire rain and snow storm area,exceeding the average of the month. The high-level divergence systems superimposed on the low-level convergence systems of the vortex and the cyclone provide a strong and lasting upward movement for the severe rain and snow storm.The heavy rain area and the blizzard region respectively stand for the convection instability stratification and the con-ditional symmetric instability stratification,and the frontogenesis favours the heavy snow storm.The en-vironmental conditions of the snowflake formation and growth,and the melting of the snowflakes falling are equally important in determining the precipitation type.The combinations of the two reasons men-tioned above ensure the emergence of snow on the ground surface.关键词
暴雨雪/降水相态/条件性对称不稳定Key words
rain and snow storm/precipitation type/conditional symmetric instability分类
天文与地球科学引用本文复制引用
杨晓亮,王咏青,杨敏,李江波,张叶,田雨润..一次暴雨与特大暴雪并存的华北强降水过程分析[J].气象,2014,(12):1446-1454,9.基金项目
公益性行业（气象）科研专项（GYHY201206004）、河北省气象局重点项目（12ky34）和河北省气象局“强对流创新团队”共同资助 （）
