The"14th Five-Year Plan"further clarifies the new concept and trend of urban development,pro-posing the construction of low-carbon cities,and the rational urban development mode is the inevitable choice for the construction of low-carbon cities.Based on multi-source data such as NPP-VIIRS-like nighttime light,Land-scan population distribution,and land use,this paper calculates the carbon emissions and urban sprawl index of 278 Chinese cities,and then uses fixed-effects and spatial lag model to empirically investigate the effects of urban sprawl on carbon emissions.This study finds that urban sprawl has enhancement effect on carbon emissions,and the spatial spillover of carbon emissions further enhances the enhancement effect.The enhancement effect of urban sprawl on carbon emissions is mainly achieved by increasing commuting distance and changing land use structure.This paper also examines the effects of heterogeneity arising from geographic location and city size.When cities are small in size with low density of economic activities,the enhancement effect of urban sprawl on carbon emissions is relatively large;for larger cities with higher economic density,decentralized urban development patterns are more likely to reduce urban carbon emission levels.
关键词
城市空间结构/碳排放/城市蔓延/多源数据/影响机制
Key words
Urban spatial structure/Carbon emissions/Urban sprawl/Multi-source data/Mechanism of influ-ence
万方数据