山西省一次冬季强寒潮天气分析  

Weather analysis of a strong winter cold wave in Shanxi province

作　　者：李斯荣[1] 苗爱梅[1] 董文晓[1] 赵建峰[1] 

机构地区：[1]山西省气象台,山西太原030006

出　　处：《山西气象》2016年第1期1-4,8,共5页Shanxi Meteorological Quarterly

摘　　要：利用常规天气资料和数值预报产品，对2012年12月21—23日山西省出现的一次强寒潮天气的成因和物理量特征进行了天气分析和诊断，结果表明：此次寒潮过程属于“横槽转竖型”。乌山脊崩溃、横槽的转竖、地面冷高压的加强南下是寒潮爆发的原因。而叠加在长波槽上的短波槽在贝加尔湖西部强烈发展，形成了异常强的冷高压、锋区、冷温度中心和冷温度平流，对寒潮的爆发起到一定的促进作用。在此次寒潮过程中，涡度、温度平流等物理量特征也很明显。EC850hPa温度场的预报，对判断能否产生强寒潮天气有很好的指示作用。Using conventional observations and numerical analysis production, the causes and physical charact- eristics of a strong cold wave in 2012 December 21 to 23 over Shanxi Province were analyzed and diagnosised. The results indicated that this cold wave process bring with a transversal trough turning meridianal. Ural high pressure ridge crumbling, transversal trough turning meridianal, necessary conditions of the cold wave break. The physical surface cold high pressure moving southward were the characteristics were obvious in this strong winter cold wave such as vorticity and temperature advection. Temperature field prediction at 850 hPa of EC model could provide great information on whether or not a strong cold wave occur

关 键 词：寒潮 物理量特征 数值预报 山西 

分 类 号：P458.121.1[天文地球—大气科学及气象学]