【作者】 张嘉月； 康娜； 于学普； 卢士庆； 程昊； 祝颖； 戚跃； 谷雨；

【Author】 ZHANG Jia-yue;KANG Na;YU Xuepu;LU Shiqing;CHENG Hao;ZHU Ying;QI Yue;GU Yu;Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration,Nanjing University of Information Science and Technology;Environmental Monitoring Station of Chifeng,Inner Mongolia Autonomous Region;Inner Mongolia Ecological and Agrometeorological Center;Gengdan Institute of Beijing University of Technology;Inner Mongolia Environmental Monitoring Station;

【机构】 南京信息工程大学中国气象局气溶胶-云-降水重点开放实验室； 内蒙古自治区环境监测总站赤峰分站； 内蒙古自治区生态与农业气象中心； 北京工业大学耿丹学院； 内蒙古自治区环境监测总站；

【摘要】 本文选取呼和浩特市2014-2019年的主要大气污染物、气象要素数据,对污染物浓度的年、月变化,污染物浓度比值、相关性进行分析.分析结果表明:呼和浩特市2014-2019年空气质量为优、良的天数呈上升趋势.各污染物浓度年变化特征明显,除O₃其他污染物浓度均明显下降,各污染物的浓度变化趋势除O₃均呈"U"形分布.PM_2.5、PM₁₀污染是呼和浩特市大气污染主要研究对象.PM_2.5/PM₁₀的比值有明显的月变化特征,5月份为全年最低值.由于沙尘对呼和浩特地区的影响,春季为沙尘暴的多发期,沙尘导致空气中PM₁₀浓度急剧上升.PM_2.5和PM₁₀污染物浓度变化趋势为夏低冬高,这与当地的气象要素相关,7、8月份为呼和浩特市雨季,降雨量大,降雨量增有利于空气质量改善,降水可带走、稀释更多的污染物.且夏季高温,高温条件下,空气对流活动增加,空气净化能力越强.更多还原

【Abstract】 In this paper,the annual and monthly changes of pollutant concentrations,the ratio of pollutant concentrations and correlation were analyzed by selecting the data of major air pollutants and meteorological elements in Hohhot city from 2014 to 2019.The analysis results show that the number of days with excellent and good air quality in Hohhot City from 2014 to 2019 is on the rise.The annual variation of pollutant concentrations is obvious,except for O₃,all other pollutant concentrations decreased significantly,and the concentration trend of all pollutants except O₃ showed a "U" shaped distribution.The lowest value of PM_2.5/PM₁₀ ratio in the year is in May.Due to the influence of sand and dust on the Hohhot area,spring is the period of frequent sand and dust storms,and sand and dust lead to a sharp increase in PM₁₀ concentration in the air.The trend of PM_2.5 and PM₁₀ pollutant concentrations is low in summer and high in winter,which is related to the local meteorological elements.And the high temperature in summer,the high temperature conditions,air convection activity increases,the stronger the air purification ability.更多还原