利用NPP-VIIRS夜间灯光遥感数据分析城市蔓延对雾霾污染的影响

Analysis of the Impact of Urban Sprawl on Haze Pollution Based on the NPP-VIIRS Nighttime Light Remote Sensing Data

雾霾污染已经成为中国乃至全球重点关注的生态环境问题之一。与此同时,中国的雾霾污染与城市蔓延在某种程度上相伴而生。城市蔓延是否加剧了中国的雾霾污染目前还没有明确的答案。因此,利用美国国家极地轨道合作卫星搭载的可见光红外成像辐射仪(national polar-orbiting partnership.s visible infrared imaging radiometer suite,NPP-VIIRS)获取的夜间灯光数据,在量化城市蔓延的基础上构建面板数据模型,探究城市蔓延是否会对城市雾霾污染产生影响,并利用中介效应模型验证城市蔓延影响雾霾污染的驱动机制。研究结果表明,夜间灯光数据可以有效地量化与表征城市蔓延,且中国的城市蔓延在一定程度上加剧了雾霾污染。此外,城市蔓延主要通过集聚效应、土地城镇化效应、产业结构效应等途径影响雾霾污染。

Objectives:Since China.s haze pollution to some extent accompanies urban sprawl,whether urban sprawl has exacerbated China.s haze pollution is still unclear.Thus,exploring the effect of urban sprawl on haze pollution will provide a scientific reference for China to build a sustainable urban development path.Methods:Based on the NPP-VIIRS(national polar-orbiting partnership.s visible infrared imaging radiometer suite)nighttime light data,we first comprehensively calculate the index of urban sprawl.Then,through the construction of a panel data model for 204 sample cities in Chinse mainland at the prefectural level,the empirical analysis of the effect of urban sprawl on haze pollution is conducted.Also,the driving mechanism of urban sprawl.s effect on haze pollution is comprehensively identified by means of mediating effect method.Results:Compared with the original NPP-VIIRS data,the corrected NPP-VIIRS data performs better results which could more accurately reveal the gross domestic product,electric power consumption,and population in China.It.s verified that the nighttime light data can be a good substitute for statistical data to measure and quantify the urban sprawl index.Urban sprawl will aggravate smog pollution and this result has passed the robustness test after removing cities in the heating area.We find urban sprawl indirectly affected on haze pollution mainly through hag glomeration effects,land urbanization effects,and industrial structure effects.Specifically,in the process of urban sprawl in China,the increase of population size,the rapid expansion of construction land,and the high proportion of secondary industry value are the important key factors for the aggravation of haze pollution.Conclusions:We provide a new perspective to reveal the effect of urban sprawl on haze pollution from the nighttime light data.We suggest the control of haze pollution should be based on the actual situation of China and formulate a haze control policy suitable for the conditions of China.