中国二氧化硫的时空分布及主要排放来源研究

Spatial and temporal distribution of sulfur dioxide and main emission sources in China

随着城市化进程的加快和经济的快速发展,中国已成为世界第三大二氧化硫(SO_(2))排放国,人类健康和社会经济的可持续发展面临着严峻的挑战.基于OMSO_(2)e产品分析了2005~2020年中国区域大气SO_(2)柱浓度的时空格局变化,并利用MEIC排放数据和社会经济数据探讨影响中国10大经济分区SO_(2)变化的主要因素.结果表明:16年间SO_(2)呈现波动下降的趋势,新疆和青藏高原地区略微增长,其余地区均呈现显著降低的趋势.SO_(2)年际变化较大,整体呈现东高西低的空间分布格局,北部沿海和黄河中游地区年均值和变异系数最高.SO_(2)与工业源、居民源、电力源、交通源及第二产业占GRP比重呈现正相关,与人口密度、工业废气治理设施和工业废气治理费用呈现负相关.排放源的变化直接影响了SO_(2)的变化.本研究为各地区制定相关的减排政策和生态环境保护提供了理论依据和参考.

s:With the rapid development of urbanization and economy,China has become the world's third largest emitter of sulfur dioxide(SO_(2)),posing severe challenges to human health and the sustainable development of social and economic.Based on OMSO_(2)e products,this paper analyzed the spatial and temporal changes of atmospheric SO_(2) column concentrations in China from 2005 to 2020 and used MEIC emission data and socio-economic data to explore the main factors affecting SO_(2) changes in China's 10 economic regions.The results show that:(1)Over the past 16 years,SO_(2) 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)SO_(2) 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)SO_(2) 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 SO_(2).This paper provides a theoretical basis and reference for formulating relevant emission reduction policies and ecological environmental protection in China.