干旱区研究2024，Vol.41Issue(3)：375-386,12.DOI:10.13866/j.azr.2024.03.03
2013-2023年兰州山谷持续性冷池空气污染特征
Characteristics and pollutant concentrations of persistent cold air pools in Lanzhou from 2013 to 2023
摘要
Abstract
Persistent cold air pools(PCAPs)in valley cities lead to the prolonged accumulation of air pollutants,thereby affecting the lives and health of residents.In this study,sounding data and daily air quality data from Jan-uary 2013 to November 2023 were used to calculate and statistically analyze the characteristics of PCAPs occur-rences in the Lanzhou Valley.In addition,the impact of PCAPs intensity on changes in pollutant concentrations was explored,and variations in pollutant concentrations during PCAPs were analyzed and compared with concur-rent dust aerosol pollution.Results indicate that from 2013 to 2023,59 PCAPs occurred,lasting cumulative 197 days.During PCAPs,valley heat deficit and PM2.5 concentrations were 4.4 J·m-2 and 52.59 μg·m-3 higher,respec-tively,compared with non-PCAPs.The air quality index(AQI),SO2 concentration,NO2 concentration,CO concen-tration,and PM10 concentration increased by 70.37%,144.3%,84.3%,156%,and 73.15%,respectively,whereas O3 concentration decreased by 60.89%during PCAPs.In PCAPs without dust aerosols,the average PM2.5:PM10 ratio was 0.58,whereas in PCAPs with dust aerosols,the average ratio was 0.31.During PCAPs with concurrent dust aerosols,PM2.5 concentration,PM10 concentration,AQI,and O3 concentration increased by 18.33%,133.03%,84.44%,and 8.5%,respectively.However,SO2 and CO concentrations decreased by 17.54%and 17.88%,respec-tively.These findings can serve as a reference for atmospheric pollution prevention and management strategies in the Lanzhou region.关键词
持续性冷池/沙尘气溶胶/山谷城市/山谷热亏缺/空气污染Key words
persistent cold air pools/dust aerosol/valley cities/valley heat deficit/air pollution引用本文复制引用
康国强,马敏劲,曹译丹,陈然..2013-2023年兰州山谷持续性冷池空气污染特征[J].干旱区研究,2024,41(3):375-386,12.基金项目
干旱气象科学研究基金项目面上项目(IAM202002) （IAM202002）
