Characteristics of spatial and temporal distribution of air pollution in the Lanzhou-Xining urban agglomera-tion and its response to land use
[Objective]To study the spatial and temporal variation of air pollutants in the Lanzhou-Xining urban agglomeration and to investigate the influence of land use patterns on air pollutants.[Method]Based on the air pollution data and land use data of Lanzhou-Xining urban agglomeration,the inverse dis-tance weight method and Tyson polygon method were used to analyze the spatial and temporal change char-acteristics of land use and air pollutants in Lanzhou-Xining urban agglomeration,and the correlation be-tween land use and air pollution was analyzed by Pearson correlation coefficient.[Result]The land use of the Lanzhou-Xining urban agglomeration changed relatively rapidly from 2015 to 2020,with the area of ar-able land,forest land,grassland and unused land decreasing and the area of built-up land and water increas-ing;the concentrations of air pollutants showed a general decreasing trend,except for O3,which first de-creased and then increased;the six air pollutants showed significant seasonality,monthly variability and spa-tial heterogeneity.There is a response relationship between land use change and air pollution,the proportion of built-up and arable land area is positively correlated with the pollution level of CO,NO2,PM2.5 and PM10,the proportion of water area and vacant land is negatively correlated with the pollution level of CO,NO2,PM2.5 and PM10,and the proportion of forest land area is negatively correlated with the concentration of SO2.[Conclusion]The spatial and temporal distribution of air pollution in the Lanzhou-Xining urban ag-glomeration responds positively responses to land use changes,and the corresponding relationships between different land use types and air pollutants are different.
air pollutionland useLanzhou-Xining urban agglomerationtemporal and spatial variationcorrelation analysis
NETL
NSTL
万方数据
