Analysis of Ozone Pollution Variations Characteristic and Its Meteorological Influences and Transport Source in Chenzhou City from 2015 to 2021
Based on analysis of ozone(O3)pollution characteristics of different time scales from 2015 to 2021 of Chenzhou City,the influence of meteorological factors on ozone pollution were further studied,ozone pollution transmission path and potential pollution sources in Chenzhou City were investigated by using the potential source contribution function(PSCF).Results indicated that the quality level of O3 is mainly excellent and good in Chenzhou City from 2015 to 2021,proportion reached 98.9％,the days in which O3 was the primary pollutant showed a fluctuating upward trend.Overall,the annual average concentration of MDA8 presented an upward trend,exhibiting a 6.0％increase from 2015 to 2021,monthly variations of each year featured with an"M"-type double peak,the diurnal variation showed a discernible single-peak and single-valley distribution with a peak between 14:00 and 15:00.The O3 concentration demonstrated a significant linear positive correlation with hours of sunshine and air temperature,and demonstrated a significant linear negative correlation with the relative humidity,O3 concentration rises first and then decreases with the increase of wind speed.The transmission mainly relied on short-distance airflow from northeast and south during over-standard days of O3 pollution in Chenzhou City,accounting for 89.7％.Based on the high contribution of local southwest pollution,the pollution from southwest and northwest of Guangdong province,northwest of Jiangxi province,middle part of Hubei province were obvious,in order to control the O3 pollution in Chenzhou City,it is necessary to further strengthen regional joint prevention and control on the basis of strict control of local pollution discharge.
NETL
NSTL
万方数据
