长三角地区大气NO<sub>2</sub>和CO<sub>2</sub>浓度的时空变化及驱动因子分析

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Abstract In this paper, with the Yangtze River Delta urban agglomerations as the study area, the satellite remote sensing data were used to carry out collaborative analysis on the temporal and spatial variations of atmospheric NO₂ and CO₂ concentrations and the driving factors, which revealed the areas with high concentrations of air pollution and CO₂. The results indicated that the spatio-temporal distributions of NO₂ and CO₂ and its changing characteristics in the Yangtze River Delta urban agglomeration areas were subjected to the combined effects of human activities such as fossil fuel combustion and vehicle emissions, as well as natural conditions such as regional topography, regional topography, surface coverage and climate. The areas with high concentrations of atmospheric NO₂ and CO₂ were in an U-shaped distribution towards the southwest direction around Taihu Lake, which was consistent with the distribution of the surrounding large urban areas and the industrial emission areas. Featured with seasonal distribution characteristics, the atmospheric NO₂ concentrations were higher in autumn and winter, and the lowest in summer. Affected by vegetation CO₂ uptake and CO₂ emission accumulation, atmospheric CO₂ concentrations were the lowest in August-September and the highest in April-May. In addition, with the sharp reduction in anthropogenic emission activities from January to March 2020, NO₂ concentrations were reduced by more than 50% compared with the same period in 2019 and dropped the most in cities with large-scale ferrous-metal and coal-processing industrial heat sources.

Key words： air pollution anthropogenic emission NO₂ CO₂ collaborative analysis the Yangtze River Delta spatial distribution

Received: 27 December 2021

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	HE Yue
	SHENG Meng-ya
	LEI Li-ping
	GUO Kai-yuan
	HE Zhong-hua
	CAI Ju-zhen
	FANG He
	ZHANG Xiao-wei
	LIU Ying
	ZHANG Yu-hui

Cite this article:

HE Yue,SHENG Meng-ya,LEI Li-ping等. Driving factors and spatio-temporal distribution on NO₂ and CO₂ in the Yangtze River Delta[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(8): 3544-3553.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I8/3544

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