中国二氧化硫的时空分布及主要排放来源研究

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Abstract With the rapid development of urbanization and economy, China has become the world's third largest emitter of sulfur dioxide (SO₂), posing severe challenges to human health and the sustainable development of social and economic. Based on OMSO₂e products, this paper analyzed the spatial and temporal changes of atmospheric SO₂ column concentrations in China from 2005 to 2020 and used MEIC emission data and socio-economic data to explore the main factors affecting SO₂ changes in China's 10 economic regions. The results show that:(1) Over the past 16 years, SO₂ has decreased in a fluctuation way, with a slight increase in Xinjiang and the Qinghai-Tibet Plateau, while other regions showed a significant decreasing trend. (2) SO₂ exhibited large inter-annual variation and displayed a spatial distribution pattern of high levels in the east and low levels in the west. The northern coastal areas (NC) and the middle reaches of the Yellow River (MYR) had the highest annual average concentrations and coefficients of variation. (3) SO₂ was positively correlated with the proportion of industrial sources, residential sources, power sources, transportation sources and secondary industries in GRP while it was negatively correlated with population density, industrial emission gas treatment facilities and associated expenses. (4) Changes in emission sources were the main factors influencing variations in SO₂. This paper provides a theoretical basis and reference for formulating relevant emission reduction policies and ecological environmental protection in China.

Key words： sulfur dioxide column concentration (SO₂) spatial-temporal distribution sources of emissions Random forest influencing factors

Received: 25 April 2023

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	WEI Ye-xiang
	ZHANG Xiao-yu
	ZHANG Hong

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WEI Ye-xiang,ZHANG Xiao-yu,ZHANG Hong. Spatial and temporal distribution of sulfur dioxide and main emission sources in China[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(11): 5678-5686.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I11/5678

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