Research On The Development And Change Model Of Atmospheric Environment In Beijing-Tianjin-Hebei Region Based On WRF

The Beijing-Tianjin-Hebei region,as my country’s "capital economic circle",is actually an urban agglomeration.The city cluster is centered on Beijing and Tianjin,and Hebei Province surrounds the periphery of Beijing and Tianjin.The rapid development of my country’s economy is inseparable from the support of energy resources,but energy consumption will inevitably cause pollution.At present,most of the main pollutants in Chinese cities are PM10 and PM2.5.Moreover,greenhouse gas emissions,mainly carbon dioxide,are slowly changing our country’s climate.Therefore,it is necessary to study smog and carbon emissions in the Beijing-Tianjin-Hebei region.This article first analyzes the temperature and precipitation,and conducts trend analysis and mutation analysis of extreme precipitation changes based on the established extreme precipitation index system.After that,the air quality in the Beijing-Tianjin-Hebei region was discussed with sulfur dioxide,PM2.5,and PM 10 as representatives,and the LMDI method was used to decompose carbon dioxide emissions.Then use the WRF model to couple the chemistry module for numerical simulation and prediction,and finally display the experimental results visually and provide the download function of related data for the convenience of related researchers.The work done in this article is as follows:(1)Build a database,the data content includes daily meteorological station data of temperature and precipitation,and daily sulfur dioxide,PM2.5,PM 10 data,etc.(2)Define and construct an extreme precipitation index system,use mutation testing methods to find the year of sudden changes in temperature,precipitation,and extreme precipitation events,and use wavelet analysis to study the periodic law of extreme precipitation events.(3)The IPCC emission factor method is used to calculate the carbon emissions of Beijing,Tianjin,and Hebei Province,and the LMDI decomposition method is used to explore the impact of different factors on carbon dioxide emissions.(4)Study the inter-annual variation of pollution days in the Beijing-Tianjin-Hebei region based on the available data,and analyze the changes in the concentration of pollutants represented by sulfur dioxide,PM2.5,and PM10 in the atmospheric environment.And it analyzed the changes in pollutant concentration and the causes of the recent sand and dust weather.(5)The WRF model is used to simulate the temperature and precipitation in the Beijing-Tianjin-Hebei region,and the WRF-Chem model is used to simulate the pollutants in the atmospheric environment,and compared with the ground weather station data provided by the National Atmospheric Center.Among them,temperature and precipitation are divided into three angles:annual average,summer and winter,and according to the scattered distribution of meteorological stations in the Beijing-Tianjin-Hebei region,a scatter diagram is made for comparison,and the comparison is more accurate.(6)Relying on the database constructed in the early stage and the results of the experiment,the development and changes of the atmospheric environment in the Beijing-Tianjin-Hebei region were visually displayed,and the Beijing-Tianjin-Hebei atmospheric environment development and change research platform was designed and implemented,which provides relevant data downloads Service can be convenient for related researchers.