Statistical Measurement Of The Relationship Between Urban Haze And Other Air Pollutants In Hebei Province

With the rapid development of our country's economy,the acceleration of the process of urbanization and industrialization is accompanied by more environmental problems,such as people's over-exploitation and utilization of natural resources,increased coal combustion,and automobile exhaust emissions.Among them,air pollution is one of the most important problems,and the harm to people is increasing day by day.As a result,it has attracted widespread attention and great attention from the country.Hebei Province has become a severely affected area due to haze pollution due to heavy industrial production such as steel and coal.Based on the understanding of haze,air pollutants,and the relationship between the two,this article uses cities in Hebei Province from January 1,2013 to May 31,2013,and from January 11,2017 to May 17,2017.PM_2.5,PM₁₀,SO₂,NO₂,O₃ hourly concentration data,the city of Hebei Province is divided into different time periods and different regions according to the haze pollution status;and based on different periods and different regions,regression analysis and causality tests are used to explore the relationship between haze and other air pollutants.It can be seen that the urban haze pollution in Hebei Province has improved,but the time characteristics are still obvious.The haze concentrations in January and February were significantly higher than those in March,April and May.The distribution characteristics of haze areas are obvious.According to cluster analysis,cities can be divided into three categories:ShiXingHan;CangHengTangLangBao;and ZhangChengQin in 2013.In 2017,the city was divided into three categories:ShiXingHanBaoCangHeng;QinTangLang and ZhangCheng.The specific research results show that:First,the relationship between each pollutant and PM_2.5 increases with the increase of PM_2.5 concentration?from January to February is higher than from March to May?,of which PM₁₀,NO₂,CO have a positive effect on PM_2.5;O₃ It has a negative impact on PM_2.5 as a whole?except January-February 2017?,and the impact of SO₂on PM_2.5 will vary with the concentration of PM_2.5.Secondly,in 2017,the compound characteristics of smog pollution are obvious.Under the joint action of other air pollutants,SO₂ and O₃ have a more obvious impact on PM_2.5.Third,the relationship between PM_2.5 and PM₁₀ is the closest,followed by CO,NO₂ and O₃,and the causal relationship between PM_2.5and SO₂ is the least obvious.When PM_2.5 concentration is higher,the dynamic relationship between PM_2.5 and other air pollutants is also stronger.Compared with other types of cities,the dynamic relationship between PM_2.5 and other air pollutants in areas with severe haze pollution is relatively strong.