辽宁中部地区持续性污染的天气分型
投稿时间: 2017-02-21  最后修改时间: 2017-06-10  点此下载全文
引用本文:
摘要点击次数: 156
全文下载次数: 178
作者单位E-mail
王若男 辽宁省气象装备保障中心, 辽宁 沈阳 110166  
刘宁微 中国气象局 沈阳大气环境研究所, 辽宁 沈阳 110166 ningweiliu@126.com 
马林 辽宁省气象装备保障中心, 辽宁 沈阳 110166  
郭宗凯 辽宁省气象装备保障中心, 辽宁 沈阳 110166  
刘振宏 辽宁省气象装备保障中心, 辽宁 沈阳 110166  
李东宇 辽宁省气象装备保障中心, 辽宁 沈阳 110166  
于文博 辽宁省气象装备保障中心, 辽宁 沈阳 110166  
王一 辽宁省气象装备保障中心, 辽宁 沈阳 110166  
郭海 辽宁省气象装备保障中心, 辽宁 沈阳 110166  
基金项目:中国气象局大气化学重点开放实验室开放课题(2017B02);辽宁省气象局科学技术研究项目博士科研专项(D201603);城市扩展的大气环境效应与景观格局优化项目(41730647)
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全部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
 
Analysis of pollution weather types in central Liaoning Province
Abstract:In order to reveal the meteorological reasons for the formation and development of regional atmospheric pollution,according to the large-scale weather background,NCEP reanalysis data and surface atmospheric composition observation data were used to divide the persistent air pollution processes over central Liaoning Province during 2010-2012 into five types,namely,Mongolia High Type,Denatured High Type,Mongolian Cyclone Type,Weak Depression Type and Jiang-huai Cyclone Type.Further physical characteristic study shows that the pollution events caused by Mongolian Cyclone account for the highest ratio of 32.7% whereas those caused by Jiang-huai Cyclone account for the lowest ratio of 6.1%.All the eleven events caused by Mongolia High appear in winter while all the four events caused by Weak Depression appear in summer.The fifteen events caused by Denatured High appear in winter,autumn and spring,whereas the three events caused by Jiang-huai Cyclone appear in summer,autumn and winter.The sixteen events caused by Mongolian Cyclone appear in all the seasons.All the above show that autumn and winter are the high-occurrence seasons for Mongolia High Type,Denatured High Type and Mongolian Cyclone Type,and summer is the high-occurrence season for Weak Depression Type and Mongolian Cyclone Type.Boundary layer physical mechanism study shows that the horizontal convergence,vertical transport and atmospheric stratification stability of Jiang-huai Cyclone Type and Mongolia High Type are similar,whereas the inversion of the former is stronger.As for Jiang-huai Cyclone Type,the relative humidity is as high as over 95% and the downward flow is as strong as 0.2-0.4 Pa/s,along with the inversion strength at 0.7℃/hm and inversion height at 925 hPa.Compared with these two types,the horizontal convergence of the other three is similar,but the downwind,atmospheric stratification stability and inversion are significantly weaker,even rarely appear.
keywords:persistent pollution process  pollution weather types  horizontal convergence  inversion
查看全文  查看/发表评论  下载PDF阅读器