首页 | 本学科首页   官方微博 | 高级检索  
     检索      

2000年4月12日特强沙尘暴天气分析
引用本文:徐建芬,陶健红,杨民,杨建才.2000年4月12日特强沙尘暴天气分析[J].气象,2001,27(6):22-26.
作者姓名:徐建芬  陶健红  杨民  杨建才
作者单位:兰州中心气象台,
摘    要:对2000年4月12日归生在甘肃,青海,宁夏的一次强沙尘暴天气进行了天气成因分析,分析指出:“4.12”沙尘暴是西北路径强冷空气引发的锋后西大风沙尘暴天气过程,前期持续增温为沙尘暴的发生提供了有利的热力条件,河西气旋性涡旋的生成,发展是激发沙尘暴的中尺度天气系统,西北地区干暖舌的形成和维持对沙尘暴的发生以及落区有很好的指示性,高空急流发生异变时的非平衡状态变化导致对流层中下部锋区加强和大气层结不稳定,为中小尺度系统和沙尘暴的产生提供了有昨的大尺度环流背景,河西狭管地表和特殊的流沙,尾矿矿地表为沙尘暴形成提供了有利的地理环境。

关 键 词:沙尘暴  环流  天气分析  成因  2000年  干暖区  冷空气

An Analysis of Strong Sandstorm on 12th April
Xu Jianfen\ Tao Jianhong\ Yang Min\ Yang Jiancai.An Analysis of Strong Sandstorm on 12th April[J].Meteorological Monthly,2001,27(6):22-26.
Authors:Xu Jianfen\ Tao Jianhong\ Yang Min\ Yang Jiancai
Abstract:A strong sandstorm weather process occurred on the 12th April 2000 in Gansu,Shanxi and Ningxia provinces is analyzed.The results show that the event was caused by the northwest strong cold air.Before the occurrence of sandstorm,continual temperature rising was the favorable thermal condition,and the development of Hexi cyclonic eddy was meso scale system which stimulated the sandstorm.The development and persistence of dry warmer sector in northwest is the index of its occurrence.Unbalanced state of the abnormal jet intensified the front over middle and lower troposphere and the unsteady atmospheric level which provided a favorable large scale circulation environment.Moreover,the long and narrow terrain and special quicksand,quick ore sand over the ground surface also provided a favorable condition geographically.
Keywords:sandstorm\ meso  low\ dry  warm sector\ abnormal jet
本文献已被 CNKI 维普 万方数据 等数据库收录!
点击此处可从《气象》浏览原始摘要信息
点击此处可从《气象》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号