| The quality of the air has a great impact on our health and our lives.However,in recent years,the increasing air pollution has made us have to reunderstand the quality of the air.Firstly,this paper analyzes the spatial and temporal distribution of air quality in Beijing-Tianjin-Hebei region,and finds the spatial and temporal distribution difference of the 11 city in Beijing-Tianjin-Hebei region.Then,principal component regression analysis is used to elaborate the main reasons for the spatial and temporal distribution difference of air quality in Beijing-Tianjin-Hebei region(except Cangzhou and Handan).By constructing an empirical model of the factors affecting the temporal and spatial distribution difference of air quality in Beijing-Tianjin-Hebei region,find the differences between the main influencing factors of air quality in 11 cities.The results show that:(1)According to the air condition distribution,the Beijing-Tianjin-Hebei region can be divided into three categories,namely the northern region,the central region and the southern region;(2)the 11 cities shows the obvious cycle characteristics,and the best times are between June and September,but the worst air quality time is around December;(3)11 cities shows significant seasonal difference,but there is no obvious week feature.Saturday was slightly larger than that on the working day,but the difference is not obvious;(4)The influence factors of the air quality in Beijing-Tianjin-Hebei region are different.The emission factors and average wind speed are closely related to the air quality in 11 cities.Among them,the emission factor is positively correlated with the AQI,while the average wind speed is negatively correlated with the AQI.Finally,some suggestions are given according to the analysis results. |
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