中国NO_(x)排放时空分布变化及其驱动因素分析

Spatial and temporal distribution and driving factors of NO_(x)emission in China

NO_(x)是一种主要的空气污染物。分析了中国NO_(x)排放量的时空分布特征,并利用地理探测器探析NO_(x)排放量空间分异驱动因素的交互作用。结果表明:(1)2011-2018年,中国NO_(x)排放量整体下降超过50%,呈中东部高、西部低的格局;NO_(x)排放强度整体降低71.29%,呈西北高、东南低的分布格局,且东西部差异明显。(2)2017年,经济发展与人口数量、汽车保有量、环境规制,汽车保有量与人口数量、环境规制之间的交互作用对NO_(x)排放量空间分异的解释力较强,且与2011年相比均有不同程度提高;产业结构与人口数量、经济发展、能源结构、环境规制,能源结构与人口数量、环境规制,人口数量与环境规制之间的交互作用对NO_(x)排放量空间分异的解释力较弱,且与2011年相比均有不同程度降低。

NO_(x) is a major air pollutant.Spatial and temporal distribution characteristics of NO_(x) emission in China were analyzed,and the interaction of driving factors of NO_(x) emission spatial differentiation was analyzed by the Geodetector.The results showed that:(1)in 2011-2018,the amount of NO_(x) emission in China generally decreased by more than 50%,showing a pattern of high in the central and eastern regions and low in the western regions.The overall NO_(x) emission intensity decreased by 71.29%,showing a distribution pattern of high in the northwest and low in the southeast,with obvious differences between the east and the west.(2)In 2017,the interaction between economic development and population,car ownership,environmental regulation,car ownership and population,environmental regulation had a strong explanatory power on the spatial differentiation of NO_(x) emissions,and had improved in varying degrees compared with 2011.The interaction between industrial structure and population,economic development,energy structure,environmental regulation,energy structure and population,environmental regulation,population and environmental regulation had weak explanatory power on the spatial differentiation of NO_(x) emissions,and had decreased to some extent compared with 2011.