Analysis on the Characteristics and Pollution Process of a Severe Pollution in Xi'an
In order to understand the role of meteorological factors and pollution transmission in severely polluted weather in Xi'an,based on air quality data from monitoring stations in Xi'an and its surrounding areas,combined with meteorological observation data such as relative humidity,temperature,wind speed,and wind direction,a comprehensive analysis of the causes of pollution weather process characteristics was conducted using correlation analysis and cluster analysis from November to December 2022.The results showed that the pollution process was mainly caused by PM2.5,with its concentrations far exceeding the national second level standard value,and there was a high correlation between PM2.5 and CO,as well as NO2;high relative humidity and low wind speed were the main meteorological factors of this sever PM2.5 pollution;in addition to local pollution source emissions,Yuncheng and Weinan had the most significant contributions to the local transport of fine particle in Xi'an.
NETL
NSTL
万方数据
