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成都市大气能见度变化特征及影响因子研究
引用本文:白爱娟,钟文婷,华兰,张舒杼.成都市大气能见度变化特征及影响因子研究[J].中国环境监测,2014,30(2):21-25.
作者姓名:白爱娟  钟文婷  华兰  张舒杼
作者单位:成都信息工程学院大气科学学院, 四川 成都 610225;成都信息工程学院大气科学学院, 四川 成都 610225;成都市气象局环境气象服务中心, 四川 成都 610072;成都信息工程学院大气科学学院, 四川 成都 610225
基金项目:财政部、科技部公益性行业(气象)科研专项(GYHY201206042)
摘    要:利用MICAPS 2008—2011年地面观测资料,分析了成都市区大气能见度的变化特征。以2009年成都地区一次低能见度天气过程为例,分析大气能见度与各气象要素的变化关系,讨论影响成都市大气能见度变化的主要因素。结果表明:近年来伴随着霾天数的逐年下降,成都市区年平均大气能见度呈上升趋势,夏季平均值最高,春季次之,冬季最低。高湿和低风速是造成成都市低能见度现象的主要气象条件。PM2.5的浓度与成都市大气能见度呈显著负相关,PM2.5浓度的快速增长是造成大气能见度急剧降低的重要原因。有效降低PM2.5浓度,减少大气污染物排放,是改善成都市区大气能见度的有效途径。

关 键 词:大气能见度  气象因子  PM2.5

Analysis on the Variation of Visibility in Chengdu and its Factors of Low Visibility
BAI Ai-juan,ZHONG Wen-ting,HUA Lan and ZHANG Shu-zhu.Analysis on the Variation of Visibility in Chengdu and its Factors of Low Visibility[J].Environmental Monitoring in China,2014,30(2):21-25.
Authors:BAI Ai-juan  ZHONG Wen-ting  HUA Lan and ZHANG Shu-zhu
Institution:Chengdu University of Information Technology, Chengdu 610225, China;Chengdu University of Information Technology, Chengdu 610225, China;Environmental Meteorology Service Centre of Chengdu Meteorological Bureau, Chengdu 610072, China;Chengdu University of Information Technology, Chengdu 610225, China
Abstract:The variation characteristics of visibility in Chengdu was studied by using the MICAPS data from 2008 to 2011.The correlation of visibility and some meteorological factors and the main influence factors of the variation of visibility in Chengdu were studied and discussed through analyzing a case which the visibility rapidly changed to a low stage in Chengdu. The results showed that the averaged visibility in Chengdu increase by years while the haze days decreased rapidly in the past four years. Summer performs the best in the seasonal visibility change of Chengdu, followed by spring, and winter is the worst. High humidity and low wind speed resulted in the low visibility in Chengdu.The atmospheric visibility in Chengdu was significantly negatively correlated with PM2.5 concentration.The rapid growth of particle concentration caused a sharp reduction of atmospheric visibility in Chengdu.It is an effective way to improve the visibility in Chengdu by reducing PM2.5 concentration and atmospheric emission.
Keywords:visibility  meteorological factor  PM2  5
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