Investigating the influence of urban land use and landscape pattern on PM2.5 spatial variation using mobile monitoring and WUDAPT

《Investigating the influence of urban land use and landscape pattern on PM2.5 spatial variation using mobile monitoring and WUDAPT》

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作者单位: School of Architecture, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong Special Administrative Region;The Institute of Environment, Energy and Sustainability (IEES), The Chinese University of Hong Kong, Shatin, N.T., Hong Kong Special Administrative Region;Institute of Future Cities (IOFC), The Chinese University of Hong Kong, Shatin, N.T., Hong Kong Special Administrative Region;CUHK Jockey Club Institute of Ageing, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong Special Administrative Region;Faculty of Architecture, The University of Hong Kong, Hong Kong Special Administrative Region;School of Architecture, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong Special Administrative Region;The Institute of Environment, Energy and Sustainability (IEES), The Chinese University of Hong Kong, Shatin, N.T., Hong Kong Special Administrative Region;Institute of Future Cities (IOFC), The Chinese University of Hong Kong, Shatin, N.T., Hong Kong Special Administrative Region;CUHK Jockey Club Institute of Ageing, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong Special Administrative Region;Faculty of Architecture, The University of Hong Kong, Hong Kong Special Administrative Region;Research Paper"}]},{"#name":"title","$":{"xmlns:ce":true,"id":"tm005"},"$$":[{"#name":"__text__","_":"Investigating the influence of urban land use and landscape pattern on PM

摘要: Particulate matter that <2.5 µm in aerodynamic diameter (PM2.5) has been recognized as one of the principal pollutants that degrades air quality and increases health burdens. In this study, we employ the MLR and GWR modelling method to obtain estimation models for PM2.5 with a set of land use/landscape metrics as predictor variables. The study focused on investigating the influence of urban land use and landscape pattern on PM2.5 spatial variation, specifically, on identification of influential landscape classes/types that regulate PM2.5 concentration levels. The spatial PM2.5 concentration in the compact urban scenario of Hong Kong was sampled by conducting a series of mobile monitoring campaigns. The Local Climate Zone (LCZ) Scheme and World Urban Database and Portal Tools (WUDAPT) level 0 database were adopted as the basis of the calculation of land use/landscape metrics. These metrics were then adopted as the predictors to explain the spatial variations in PM2.5. 62% of the variance in PM2.5 can be explained by the resultant GWR model using only five land use/landscape classes, and without using any traffic-related variables or data from emission inventory. The findings can inform the urban planning strategies for mitigating air pollution and also indicate the usefulness of LCZ and WUDAPT in estimating the spatial variation of urban air quality.