The Temporal And Spatial Distribution Of PM_2.5 And O₃ In China In 2030

Fine Particulate Matter(PM2.5)and Ozone(O3)are important atmospheric pollutants,which not only affect human health,but also have a very negative impact on the ecological environment.Observation can be found by the history,current PM2.5 and O3 concentration to maintain at a high level in China,so the forecast China's surface PM2.5 and O3 space-time distribution characteristics,and the study of climate change and the change of discharge and the change of both their impact,help to understand the future regional air pollution situation in China,and for countries to develop atmospheric pollution and pollutants emission reduction measures,provide the necessary reference basis has important practical significance and application value.Respectively based on the numerical simulation model for the four groups of sensitivity experiments,PM2.5 and O3 concentration changes in climate change,emissions,and both the variation characteristics of the main conclusions are as follows:(1)in the numerical simulation,the future China surface temperature wiln increase 1?5?,the temperature of the western region to increase higher than the east.In the future,precipitation will decrease in the south and increase in the northeast.The boundry layer height will decrease.The surface shortwave radiation also increases primarily;(2)the climate change will lead to the concentration of PM2.5 in southern China region increased,while lower in north China region,(BTH)in beijing-tianjin-hebei region,Yangtze river delta(YRD)and the pearl river delta(PRD),and the sichuan basin area(SCB)heavy pollution days can reduce PM2.5,O3 heavy pollution days of beijing-tianjin-hebei region will reduce in the summer,in other parts of the number of days on the rise.(3)in the case of emission changes,PM2.5 concentration decreases in the eastern part of the winter and increases in other seasons.O3 has increased in the eastern part of the four seasons.The number of PM2.5 pollution days in four areas decreased in winter,and the number of O3 heavy pollution days in four areas increased by two to eight days in summer.(4)emissions and climate change,the spatial distribution of PM2.5 concentrations and discharge change are similar,the concentration of the eastern region has reduced during the winter,climate change could offset emissions increased to some extent influence on PM2.5 concentrations;O3 increased in summer except in the northeast and BTH.The number of days of PM2.5 pollution in four areas decreased during the winter,and the number of pollution days in O3 increased in the summer.