摘要
采用2013年株洲市大气污染物逐时监测资料及同时段的气象观测资料,分析了株洲市空气污染的时间变化特征及其与气象条件的关系.结果表明,2013年株洲市首要污染物为PM2.5,全年有158 d空气质量达到优、良,其中5～9月空气质量较好,其余时段空气质量较差;总的看来夏半年AQI小于冬半年,除03污染物外,其余污染物较大浓度值主要出现在冬季,夏半年污染物浓度明显小于冬半年;除O3污染物外,其余污染物均为白天浓度小于夜晚,下午为一日中浓度最低时段.风速、降水量、能见度与AQI均呈反相关关系,即风速越大越有利于污染物的扩散、降水对污染物有冲刷作用、能见度越高扩散条件越好;混合层高度越高、逆温出现概率越小,污染物被稀释、扩散的范围越广,对应污染物浓度越低,空气质量较好.
Based on the data of atmospheric pollutants and the corresponding meteorological observation data in 2013 at Zhuzhou, the temporal distributions of air pollution and its relationship with meteorological conditions were analyzed. The result showed that the primary pollutant was PM25 at Zhuzhou in 2013. There were 158 days which air quality reached at compliance. During the year air quality is the best from May to September, whereas the remaining periods were of poor air quality. The AQI index in summer months was less than that in the winter months, and pollutant concentrations were significantly lower than in winter months. Pollutant concentrations during the days were lower than during the night, and pollutant concentrations in afternoon were the lowest session of day. Wind speed, precipitation, visibility and AQI index showed a negative correlation, the greater the wind speed that is conducive to the spread of pollutants, pollutants are scouring effect of precipitation on the higher visibility diffusion conditions better. The higher mixing layer height, the smaller the probability of occurrence of inversion, pollutant diluted, the wider the range of diffusion of the corresponding lower pollutant concentration, better air quality.
出处
《安徽农业科学》
CAS
2015年第29期215-218,共4页
Journal of Anhui Agricultural Sciences
关键词
污染物
变化特征
气象条件
关系
Pollutant
AQI index
Variation characteristics
Meteorological conditions
Relationship
