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Position: Home > Articles > A Spring Soaker Process Analysis of Liaoyang City Modern Agricultural Science and Technology 2013 (20) 231-234

辽阳市一场春季透雨过程分析

作  者:
董平;刘锋
单  位:
辽宁省气象信息中心;辽宁省气象局
关键词:
透雨;冷涡;环流特征;数值预报;切变
摘  要:
2011年4月17—18日,辽阳地区出现了一次天气过程。该文利用常规气象观测资料、加密自动站逐小时降水观测资料、ECMWF及日本数值预报产品、卫星云图等资料,对此次暴雨过程的成因进行分析。通过对环流背景、探空资料、物理量诊断量以及中尺度形势等的分析发现:受北部高空冷槽(后发展成东北冷涡)和西南暖湿气流的共同影响,在动力、水汽、热力条件对降水有利的情况下,辽阳地区产生了此次极具代表性的明显透雨过程。研究发现,850 hPa的风向、风速切变对此次透雨过程有较好的指示意义;高空槽线落后于地面槽线也是产生此次降水过程的有利条件。通过对此次透雨过程的深入、透彻分析,掌握了受东北冷涡影响使得辽阳地区产生透雨性降水的一般特点,为以后春季强降水预报和透雨预报提供参考。
译  名:
A Spring Soaker Process Analysis of Liaoyang City
作  者:
DONG Ping;LIU Feng;Liaoning Provincial Meteorological Information Center;Liaoning Provincial Meteorological Bureau;
关键词:
saturating rain;;cool vortex;;circulation;;forecast;;values
摘  要:
April 17,2011 to 18,a soaking rain weather process emerged in Liaoyang City.In this paper,conventional meteorological data,encryption automatic station-by-hour precipitation observations,ECMWF and Japan NWP products,satellite imagery and other informations were used to analyze the causes of heavy rainfall. Through analyzing the circulation background,sounding data,the amount of physical diagnosis and situation in the scale,we found that by the effect of the northern high-altitude cold trough(later developed into the northeast cold vortex)and the southwest warm and humid air,the power,water vapor and heat conditions were favorable for the precipitation,Liaoyang region had a significant soaking rain.The Study found,the wind direction of 850 hPa and the wind speed had a good sense of direction of the sdaker;upper trough line on the ground behind the tank line produced favorable conditions for the precipitation process. Through analyzing the process of soaking rain,we mastered the general characteristics of precipitation soaking rain in Liaoyang area which was impacted by the northeast cold vortex,and could for heavy rain forecast in the spring and soaking rain forecast.

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