辽宁中部地区持续性污染的天气分型
投稿时间: 2018-01-02  最后修改时间: 2018-02-05  点此下载全文
引用本文:
摘要点击次数: 12
全文下载次数: 
作者单位E-mail
刘宁微 中国气象局沈阳大气环境研究所 ningweiliu@126.com 
基金项目:气象关键技术集成与应用(面上)项目(CMAGJ2014M12)
中文摘要:利用NCEP全球再分析资料和地面大气成分观测资料,根据大尺度天气背景,将2010-2012年出现在辽宁中部地区的持续性大气污染过程划分为5种类型:蒙古高压型、变性高压型、蒙古气旋型、弱低压型和江淮气旋型。进一步的边界层物理机制研究表明:江淮气旋型与蒙古高压型污染的区域水平气流辐合、垂直的气流输送、大气层结稳定度都比较相近,只是前者的逆温强度更大。相比以上两种类型,其他三种类型的水平辐合程度相当,但下沉气流、大气层结稳定度和逆温现象要明显偏弱甚至未出现。
中文关键词:持续性污染天气  污染天气分型  水平辐合  逆温
 
Characteristic analysis of pollution weather types in central area of Liaoning Province
Abstract:According to the large scale weather backgrounds, NCEP Renalysis data and surface atmospheric composition observation data were used to divide the persistent air pollution processes over central Liaoning province during 2010 and 2012 into five types. They are Type Mongolia High, Type Denatured High, Type Mongolian Cyclone, Type Weak Depression and Type Jiang-huai Cyclone. Furthermore physical characteristic study shows that the horizontal convergence, vertical transport and atmospheric stratification stability of Type Mongolia High and Type Jiang-huai Cyclone are similar, whereas the inversion of the former are stronger. Compared to the two types, the horizontal convergence of the other three is similar, but the downwind, atmospheric stratification stability and inversion are significantly weaker, even scarecely appear.
keywords:Persistent pollution process  pullution weather types  horizoantal convergence  inversion
查看全文  查看/发表评论  下载PDF阅读器