【作者】 张佳欣； 康娜； 程宇飞； 张朝； 卢士庆； 戚跃； 谷雨；

【Author】 ZHANG Jia-xin;KANG Na;CHENG Yu-fei;ZHANG Chao;LU Shi-qing;QI Yue;GU Yu;Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration,Nanjing University of Information Science and Technology;Inner Mongolia Environmental Monitoring Station;Inner Mongolia Meteorological Bureau;Gengdan Institute of Beijing University of Technology;

【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； 内蒙古气象局； 北京工业大学耿丹学院；

【摘要】 明确大气污染物的时空分布特征及其影响因素,对大气污染防控治理有重要理论价值.利用2015～2019年内蒙古空气质量逐日监测资料对12个盟市的空气质量指数和PM_2.5、PM₁₀、SO₂、NO₂、CO和O₃ 6种大气污染物逐日监测资料及同期气象要素观测资料,分析了内蒙古各市年、季、月大气污染的分布特征,以及各污染物间和气象要素的关系,结果表明:在时间分布上,5年中,除O₃浓度呈增长趋势外,其他5种污染物浓度均表现出下降趋势,在季节变化方面,表现为"夏低冬高"的季节变化特征;污染日主要集中在春冬季;在空间分布上,AQI呈现"西南高,东北低,中间过渡"的特征,其中乌海、包头、呼和浩特空气质量较差;各项污染物间存在相关性,空气质量指数受PM_2.5、PM₁₀影响较大,相关系数分别达到0.7、0.784,CO与SO₂、NO₂存在相关性,相关系数分别为0.665、0.734,温度、相对湿度、风速对各项污染物存在影响.呼和浩特和包头受来自阿拉善的气流影响,而通辽受其他地区影响更多.更多还原

【Abstract】 To clarify the spatial and temporal distribution characteristics of air pollutants and their influencing factors,which are of great theoretical value for air pollution prevention and control management.The air quality index and daily monitoring data of PM_2.5,PM₁₀,SO₂,NO₂,CO and O₃ in 12 league cities from 2015 to 2019 and the observation data of meteorological elements in the same period were used to analyze the distribution characteristics of annual,seasonal and monthly air pollution and the relationship between each pollutant and meteorological elements in each city of Inner Mongolia.The results showed that:in terms of time distribution,except for O₃,which showed an increasing trend,the concentrations of the other five pollutants showed a decreasing trend;in terms of seasonal changes,the seasonal changes were "low in summer and high in winter";the polluted days were mainly concentrated in spring and winter;in terms of spatial distribution,the AQI showed In terms of spatial distribution,the AQI shows the characteristics of "high in the southwest,low in the northeast and transitional in the middle",among which the air quality in Wuhai,Baotou and Hohhot is worse;there are correlations among various pollutants,the AQI is influenced by PM_2.5 and PM₁₀,with correlation coefficients reaching 0.7 and 0.784 respectively,and CO is correlated with SO₂ and NO₂.The correlation coefficients were 0.665 and 0.734 respectively,while temperature,relative humidity and wind speed had an influence on each pollutant.Hohhot and Baotou are influenced by the airflow from Alashan,while Tongliao is more influenced by other regions.更多还原