J4 ›› 2007, Vol. 25 ›› Issue (4): 36-40.

• 论文 • 上一篇    下一篇

宁夏一次大暴雪天气过程的物理成因

贾宏元1, 2, 3 ,赵光平2, 3 ,沈跃琴3 ,纪晓玲2, 3   

  1. 1. 兰州大学大气科学学院,甘肃 兰州 730000; 2. 宁夏气象防灾减灾重点实验室,宁夏 银川 750002;3. 宁夏气象台,宁夏 银川 750002
  • 收稿日期:2006-12-28 修回日期:2007-09-29 出版日期:2007-12-31 发布日期:2007-12-31
  • 作者简介:贾宏元(1968 - ) ,男,高级工程师,主要从事短期天气预报及灾害性天气预报方法研究. E-mail: jhy806@163. com
  • 基金资助:

    宁夏科技攻关项目“宁夏新一代灾害性天气事件联防联报监测预警体系研究”资助

Ana lysis on Causes of a Heavy Snowstorm in Ningx ia

J IA Hongyuan1,2,3 , ZHAO Guangp ing 2,3, SHEN Yueqing3 , J IXiaoling2,3   

  1. 1. College of A tm ospheric Sciences, Lanzhou University, Lanzhou 730000, China; 2. N ingx ia Key Laboratory forM eteorological D isaster Prevention and Reduction, Yinchuan 750002, China;3. N ingx ia M eteorological Observatory, Yinchuan 750002, China)
  • Received:2006-12-28 Revised:2007-09-29 Online:2007-12-31 Published:2007-12-31

摘要:

在分析大气环流及其诸层物理量场特征基础上,结合逐时卫星云图资料对2002年10月17~18日宁夏南部山区一次大暴雪天气过程成因进行了探讨,发现此次暴雪中低层存在着较明显的3股气流的共同作用,指出低涡及暖式切变线是本次过程重要的天气影响系统,降水水汽主要来自于低层输入,同时分析还表明宁夏强降雪也具有中小尺度特征。

关键词: 暴雪, 成因, 宁夏

Abstract:

Based on analysis of characteristics of atmospheric circulation and physical quantity fields on each layer, aswell as hourly satellite images, the causes of a heavy snowstorm p rocess in mountainous region of south Ningxia from 17 to 18 October in 2002 was studied. Results show that three air currents on middle and low layers p lay an important role in this p rocess, and low vortex and warm shear line are key influencing systems, and vapour transport comes p rimarily from the low layer. The study also reveals the fact that meso -microscale system is active in the heavy snowstorm p- rocess.

Key words: heavy snowstorm, cause, Ningxia

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