主办单位：中国气象局沈阳大气环境研究所
国际刊号：ISSN 1673-503X
国内刊号：CN 21-1531/P
气象与环境学报

气象与环境学报

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重庆市区大气能见度变化特征及其影响因素分析

叶堤;蒋昌潭;王飞   

  1. 重庆市环境科学研究院 重庆400020
  • 收稿日期:2006-05-17 修回日期:2006-10-25 出版日期:2006-12-01 发布日期:2006-12-01

Characteristics of atmospheric visibility and its controlling factors in Chongqing

YE Di JIANG Changtan WANG Fei   

  1. Chongqing Institute of Environmental Science;Chongqing 400020
  • Received:2006-05-17 Revised:2006-10-25 Online:2006-12-01 Published:2006-12-01

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摘要： 为研究重庆市区大气能见度变化特征,对2000～2005年的重庆能见度观测资料进行了统计分析。结果表明:市区能见度以差和较差为主,能见度的季节变化、日变化特征明显,且近年来日平均能见度有所下降。能见度与同期的地面气象条件、主要空气污染物的相关分析结果表明,在气象条件中,相对湿度和风速对能见度的影响最为明显,各季能见度均与相对湿度呈显著负相关,与地面风速呈正相关;在污染物因子中,PM10是能见度下降的最主要原因,且不同季节PM10对能见度的影响程度不同,其中以冬、夏季影响较强。

关键词: 能见度, 气象条件, PM污染, 影响因素

Abstract: Based on statistical analysis of atmospheric visibility observation data from 2000 to 2005 in Chongqing,the characteristics of atmospheric visibility were analyzed.The results showed that the visibility was mainly in poor condition and its seasonal and daily variations were obvious.Furthermore,the mean daily visibility declined with a little extent during recent years.Correlation analysis indicated that relative humidity and surface wind velocity were the main controlling factors to atmospheric visibility among meteorological factors.The visibility had significantly negative correlation with relative humidity in each season,while it had positive correlation with surface wind velocity.On the other hand,PM_(10) was the main cause of visibility degradation among pollution factors.Its influence on visibility degradation varied with the season and was relatively strong in winter and summer.