大连地区一次寒潮天气分析

Analysis of Cold Wave in Dalian Area

利用常规天气资料,应用天气分析方法,对大连北部地区2013年11月9—10日寒潮天气进行分析,结果表明:此次寒潮天气过程的环流形势为"一槽一脊"型,促使寒潮暴发的流场为横槽转竖型。高空500 hPa天气图上-44℃冷中心位于120°E;55°N^60°N;对应高空700 hPa天气图上冷中心为-32℃;而地面天气图上冷高压中心强度达到1 060 hPa,标志着冷空气的堆积达到了可产生寒潮的强度。由贝加尔湖暴发南下的冷空气偏北、偏东,大连地区只有最北部庄河站达到了寒潮标准,24 h内最低温度下降9.1℃。在此基础上进行分析,总结出大连地区寒潮天气预报着眼点。

Based on conventional weather data and synoptic analyses,cold wave weather in the northern part of Dalian on November 9~10,2013 were analyzed. The results showed that the circulation of the cold wave weather process were a trough and a ridge,and turning of transverse trough to be vertical caused the outbreak of cold flow field. 500 hPa high on the weather map -44 ℃ cold center located at 120oE;Between 55 to 60o N. Corresponding to high altitude 700 hPa center cold weather map-32℃;And the intensity of cold high pressure center on surface weather chart for 1 060 hPa,marked the accumulation of the cold air could produce cold wave intensity. The outbreak of cold air from the Lake Baikal to south area which location was usually to the north and east,only Zhuanghe which the most northern area of Dalian reached the cold wave standard,the minimum temperature dropped 9.1℃within 24 hours. The main forecast factors of cold wave in Dalian were put forward based on the above analyses.