Spatiotemporal distribution of ground-level ozone and its relationship with multi-scale landscape types
In recent years,ground-level ozone has been the primary atmospheric pollutant in China,especially in the big cities and their surrounding areas.The ground-level ozone concentration in these areas is closely related to local landscape type and configuration.In this paper,Shenzhen was taken as the study area.A generalized additive model was used to characterize the spatial and temporal distribution of ground-level ozone concentrations.The hourly ground-level ozone in situ observations obtained from the air quality monitoring stations and multiple source geospatial datasets were used as the input data to build the generalized additive model.By means of Pearson correlation analysis and significance test,as well as stepwise multiple regression model,the relationship between ground-level ozone concentrations and multi-scale landscape types were deeply analyzed.The research results can be concluded as:(1)The spatial distribution characteristics of the annual average concentration of ground-level ozone had obvious differences.The ground-level ozone concentration in the western region was higher than that in the eastern region.The annual average concentration was high in the northwestern part of the study area near the interior.The seasonal and monthly trends of ground-level ozone concentration were basically the same.The highest seasonal average concentration was observed in autumn,and the monthly average concentration peak in October,which was the key period for ground-level ozone pollution prevention and control.(2)The expansion of artificial surface had an obvious promotion effect on ground-level ozone concentration.The higher the degree of the dominance and aggregation,the more obvious the promotion effect of artificial surface patches on ground-level ozone concentration.In addition,the increase of the proportion of forest land is crucial to the reduction of ground-level ozone concentration.The higher the degree of the dominance and aggregation,the more obvious the inhibition effect of the forest land patches on ground-level ozone concentration.(3)The decrease of heterogeneity and the increase of dominance and aggregation degree of the overall landscape significantly inhibited the ground-level ozone concentration.The research results can provide scientific basis and important consults for promoting the prevention and control of ground-level ozone pollution and landscape optimization design.
万方数据
维普
