中国XCO<sub>2</sub>时空分布与影响因素分析

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Abstract We comprehensively analysed the spatio-temporal changes and seasonal patterns in the CO₂ concentrations in China from 2014 to 2018 using OCO-2XCO₂ data. Moreover, influencing factors of XCO₂ were evaluated. Regarding the temporal distribution, the CO₂ concentration in China increased at an average rate of 2.56×10^-6/a, with significant annual seasonal variations of 6.78×10^-6. A significant increasement of vegetations was observed in China between 2014 and 2018, especially in the northwest and southeast coastal, which was mainly related to the returning farmland to forest program. Seasonal variations of XCO₂ in China were generally controlled by vegetation activities, and a significant negative correlation between XCO₂ and NDVI was observed, especially in northeast China (r=-0.58). Anthropogenic emissions were identified as the dominant contributor of XCO₂ distributions, and the spatial correlation were quantified (r=0.397, P<0.05), especially for those regions with larger emissions (emissions>10³t,r=0.714). Finally, the socio-economic factors such as population, electricity consumption and road network density were found to affect XCO₂ by region, and the results of the correlation analysis were 0.78, 0.69 and 0.34, respectively.

Key words： XCO₂ concentration spatial and temporal distribution seasonal patterns analysis of influencing factors

Received: 15 December 2020

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X511

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	MO Lu
	WU Zhao-cong
	ZHANG Yi

Cite this article:

MO Lu,WU Zhao-cong,ZHANG Yi. Spatial and temporal variations of XCO₂ in China and its influencing factors analysis[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(6): 2562-2570.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I6/2562

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