深圳市宝安区臭氧污染特征分析

Study of Ozone Pollution Characteristics in Bao’an District of Shenzhen

利用2015~2018年宝安区监测数据,分析臭氧浓度时间变化特征;以2018年8月20~26日重污染过程为例,探究污染期间的气象特征。结果表明,2015~2018年宝安区O3(8h)浓度升高,超标天数增加;臭氧浓度呈现出夏季高、春季低的特点,日内变化呈单峰分布特征;重污染期间全区气温高、相对湿度低、风速低,不利的气象条件成为臭氧浓度超标的重要因素。

In order to evaluate the variations of ozone pollution in Bao'an district,analysis of temporal characteristics are carried out for 4-years(2015~2018).Meteorological characteristics are discussed during a period of ozone heavy pollution from August 20 to 26th,2018.The concentration of O3(8 h)and the number of days for ozone pollution are increased sharply in 2018.In general,the concentration of O3(8 h)is realtively higher in summer while lower in spring.The concentration of O3(1 h)presents unimodal distribution in daily variations.High temperature,low relative humidity and low wind speed are the dominating meteorological characters during the ozone heavy pollution.Unfavorable meteorological conditions have become an important factor which may cause excessive ozone concentration.