摘要
Abstract
Based on the air pollution monitoring data of Urumqi from 2018 to 2022,the Spearman rank correlation coefficient method was used to analyze the air environment quality in Urumqi,the concentration changes of six air pollutants and the impact of the COVID-19 epidemic control period on air quality.The results showed that the annual variation rates of NO2,PM10,PM2.5 and CO concentrations of air pollutants in Urumqi city showed a downward trend.The main factors affecting urban air quality were PM10 and O3 in non-heating season,while the main factors affecting urban air quality in heating season were particulate matter PM1o and PM2.5.Therefore,the pollution control of particulate matter PM10,PM2.5 and O3 should be strengthened.The air quality during the first epidemic control period was significantly better than that during the same period,and the air quality improved during the second epidemic control period.Overall,the number of days with air quality up to the standard in Urumqi showed a fluctuating growth trend,while the proportion of heavy pollution days showed a fluctuating decline trend,indicating that the atmospheric environment quality was improved.关键词
大气环境质量/Spearman秩相关系数/重污染/乌鲁木齐市Key words
atmospheric environment quality/Spearman rank correlation coefficient/heavy pollution/Urumqi分类
资源环境
