Study On The Influencing Factors Of Air Quality In Yangtze River Delta Urban Agglomeration

Since the 21st century,in addition to the rapid development of global economy,the development of science and technology has entered a new stage.Behind all this progress is the cost of consuming a lot of resources,which eventually turns into the burden of the environment.In order to alleviate the pressure of the environment,this paper takes air quality as the starting point of research,and is committed to finding the direction of coordinated development of air quality and society.In this study,the Yangtze River Delta region,which has an important strategic position in the domestic economic development,is taken as the research area,and the method research and empirical analysis are carried out around the impact mechanism of air pollutant concentration change.Firstly,by analyzing the annual change characteristics and compliance of pollutants,combined with the importance ranking of pollutants to air quality,two pollutants with more obvious impact on air quality are selected:NO₂ and PM_2.5.Then,the influencing factors and mechanism of air quality are discussed from the current situation and source of air pollutants.The specific performance is to analyze the impact of meteorological factors on pollutants and economic factors on pollutants.The results show that:（1）The distribution of pollutants in the atmosphere has a certain spatial correlation,and there are obvious high concentration and low concentration.According to the Moran scatter diagram,the air quality in Zhejiang is the best among the Yangtze River Delta urban agglomerations.（2）Among the meteorological factors,cloud cover,rainfall,temperature,wind speed and pollutant concentration are negatively correlated.Cloud cover and wind speed have more obvious changes for NO₂.For the solid pollutant PM_2.5,rainfall is an important factor affecting its concentration.The higher the temperature,the faster the small molecules move,so it has an important impact on both pollutants.（3）Based on the non-linear influence of population agglomeration on air quality change,taking population density as a threshold variable,it is analyzed that population scale,economic development level,transportation,industrial structure,technology level and urbanization have positive influence on the concentration of air pollutants,and only urban greening construction has positive influence on the concentration of air pollutants It has a certain inhibitory effect.Finally,combined with the research conclusions,this paper puts forward some suggestions on the coordinated development of air quality and society from the source of pollutants and the existence of pollutants in the atmosphere.The main contribution of this thesis is based on the actual point of view to analyze the two cases of pollutants have been produced and will be produced,specifically in the analysis of the relationship between pollutants and meteorological factors and economic factors,more comprehensive to find the factors affecting air quality,has good practical significance.