摘要
为了解呼和浩特大气污染防治效果,选取呼和浩特市2017—2022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、浓度比值、相关性进行分析,利用后向轨迹聚类对2020年3月进行分析。分析结果表明:呼和浩特市2017—2022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,各污染物的浓度变化趋势除O_(3)均呈“U”形分布。PM_(2.5)、PM_(10)污染是呼和浩特市大气污染主要研究对象,PM_(2.5)/PM_(10)的值有明显的月变化特征,5月份为全年最低值。PM_(2.5)和PM_(10)高度相关性,而NO_(2)和SO_(2)与PM_(2.5)、PM_(10)均呈现正相关性。受气象要素影响,PM_(2.5)和PM_(10)污染物浓度变化趋势为夏低冬高,7、8月降雨量大,有利于空气质量改善,降水可带走、稀释更多的污染物。而后向轨迹聚类分析得4条气团运输路径,主要气团来自东北方向,途经内蒙西部等地区,少部分来自中国内地地区。研究结果可以为呼和浩特大气污染防治提供依据。
In order to understand the effect of air pollution control in Hohhot,the main air pollutants and meteorological elements data of Hohhot from 2017 to 2022 was selected,the annual and monthly changes of pollutant concentrations,concentration ratios and correlations was analyzed,and the month of March 2020 using backward trajectory clustering was analyzed.The analysis results show these as follows.The number of days with excellent and good air quality in Hohhot City from 2017 to 2022 shows an upward trend.The annual variation of the concentration of each pollutant is obvious,and the trend of the concentration of each pollutant except O_(3) has a“U”shape distribution.PM_(2.5) and PM_(10) pollution are the main objects of the study of atmospheric pollution in Hohhot City,and the values of PM_(2.5)/PM_(10) have obvious monthly variation characteristics,with the lowest value of the whole year in May.PM_(2.5) and PM_(10) are highly correlated,while PM_(2.5) and PM_(10) are highly correlated,and PM_(2.5) and PM_(10) are highly correlated,and PM_(2.5) and PM_(10) are highly correlated.PM_(10) were highly correlated,while NO_(2) and SO_(2) showed positive correlation with both PM_(2.5) and PM_(10).Influenced by meteorological factors,the trend of PM_(2.5) and PM_(10) pollutant concentrations is low in summer and high in winter,and heavy rainfall in July and August is conducive to the improvement of air quality,and precipitation can carry away and dilute more pollutants.And the backward trajectory clustering analysis of four air mass transportation paths,the main air mass from the northeast,through the western Inner Mongolia and other regions,a small portion from the Chinese mainland.The results of the study can provide a basis for the prevention and control of air pollution in Hohhot.
作者
张嘉月
康娜
于学普
卢士庆
程昊
祝颖
戚跃
张佳欣
ZHANG Jia-yue;KANG Na;YU Xue-pu;LU Shi-qing;CHENG Hao;ZHU Ying;QI Yue;ZHANG Jia-xin(Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration,Nanjing University of Information Science and Technology,Nanjing 210044,China;Environmental Monitoring Station of Chifeng,Inner Mongolia Autonomous Region,Chifeng 024000,China;Inner Mongolia Ecological and Agrometeorological Center,Hohhot 010051,China;Gengdan Institute of Beijing University of Technology,Beijing 101301,China)
出处
《科学技术与工程》
北大核心
2024年第3期1292-1300,共9页
Science Technology and Engineering
基金
内蒙古自治区自然科学基金(2022MS04015)
国家自然科学基金(41805121,41775123)。
作者简介
第一作者:张嘉月(1999-),女,汉族,江苏淮安人,硕士研究生。研究方向:大气污染与大气环境。E-mail:1491246271@qq.com;通信作者:康娜(1980-),女,汉族,山西太原人,博士,副教授。研究方向:大气污染与大气环境。E-mail:kangna@nuist.edu.cn。
