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山东半岛低空冷流降雪分析研究
引用本文:李建华,崔宜少,单宝臣.山东半岛低空冷流降雪分析研究[J].气象,2007,33(5):49-55.
作者姓名:李建华  崔宜少  单宝臣
作者单位:1. 山东省威海市气象局,264200
2. 山东省威海市气象局,264200;兰州大学
摘    要:山东半岛的冷流天气和其他降水过程有不同的特征,对2005年12月山东半岛北部地区的连续2场暴雪天气过程进行了分析。常规的雷达资料表明回波顶最高高度为3km,体现了冷流过程的低空性。WRF中尺度数值模式的模拟结果表明:冷流过程与低层大气层结的结构特征有着密切的关系;850hPa冷平流与地面降水量有着较好的正相关关系;云水含量、云中霰含量和上升速度的垂直分布进一步证实了冷流降水的低空性。

关 键 词:冷流天气  低层  中尺度数值模拟
收稿时间:2006/10/30 0:00:00
修稿时间:2006-10-302007-01-10

Characteristics of Low Level Cold Airstream Snowfall in Shandong Peninsula
Li Jianhu,Cui Yishao and Shan Baochen.Characteristics of Low Level Cold Airstream Snowfall in Shandong Peninsula[J].Meteorological Monthly,2007,33(5):49-55.
Authors:Li Jianhu  Cui Yishao and Shan Baochen
Institution:1. Weihai Meteorological Bureau, Shandong Province, 264200; 2. Lanzhou University
Abstract:The cold airstream snowfall weather events occurring in Shandong Peninsula have different characteristics from other precipitation processes. Two continuous heavy snowfall courses in northern Shandong Peninsula in December 2005 were analyzed. It can be seen from the conventional radar data that the top layer of echo is 3 km, which reflects the low level characteristics of cold airstream courses. The simulation results by WRF meso-scale numerical model show that the cold airstream weather has a close relationship with the structure of low level atmosphere. The cold airstream of 850hPa layer has a positive correlation with ground precipitation. Vertical distributions of cloud water, cloud graupel water and vertical velocity further approved the low level characteristics of cold airstream precipatition.
Keywords:WRF
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