气候变化领域集成服务门户(CCPortal): Short-term reduction of regional enhancement of atmospheric CO2 in China during the first COVID-19 pandemic period

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DOI	10.1088/1748-9326/ac507d
	Short-term reduction of regional enhancement of atmospheric CO2 in China during the first COVID-19 pandemic period
	Sim, Sojung; Lee, Haeyoung; Oh, Eunsil; Kim, Sumin; Ciais, Philippe; Piao, Shilong; Lin, John C.; Mallia, Derek, V; Lee, Sepyo; Kim, Yeon-Hee; Park, Hoonyoung; Yun, Jeongmin; Jeong, Sujong
通讯作者	Jeong, S (通讯作者)
发表日期	2022
ISSN	1748-9326
卷号	17 期号:2
英文摘要	Recent studies have reported a 9% decrease in global carbon emissions during the COVID-19 lockdown period; however, its impact on the variation of atmospheric CO2 level remains under question. Using atmospheric CO2 observed at Anmyeondo station (AMY) in South Korea, downstream of China, this study examines whether the decrease in China's emissions due to COVID-19 can be detected from the enhancement of CO2 mole fraction (Delta CO2) relative to the background value. The Weather Research and Forecasting-Stochastic Time-Inverted Lagrangian Transport model was applied to determine when the observed mole fractions at AMY were affected by air parcels from China. Atmospheric observations at AMY showed up to a -20% (-1.92 ppm) decrease in Delta CO2 between February and March 2020 compared to the same period in 2018 and 2019, particularly with a -34% (-3.61 ppm) decrease in March. Delta CO, which was analyzed to explore the short-term effect of emission reductions, had a decrease of -43% (-80.66 ppb) during the lockdown in China. Particularly in East China, where emissions are more concentrated than in Northeast China, Delta CO2 and Delta CO decreased by -44% and -65%, respectively. The Delta CO/Delta CO2 ratio (24.8 ppb ppm(-1)), which is the indicator of emission characteristics, did not show a significant difference before and after the COVID-19 lockdown period (alpha = 0.05), suggesting that this decrease in Delta CO2 and Delta CO was associated with emission reductions rather than changes in emission sources or combustion efficiency in China. Reduced carbon emissions due to limited human activity resulted in a decrease in the short-term regional enhancement to the observed atmospheric CO2.
关键词	FOSSIL-FUEL CO2 WEATHER RESEARCH CARBON-DIOXIDE
英文关键词	COVID-19; lockdown; carbon dioxide; atmospheric reduction; WRF-STILT; China
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000754824300001
来源期刊	ENVIRONMENTAL RESEARCH LETTERS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260766
推荐引用方式 GB/T 7714	Sim, Sojung,Lee, Haeyoung,Oh, Eunsil,et al. Short-term reduction of regional enhancement of atmospheric CO2 in China during the first COVID-19 pandemic period[J]. 中国科学院青藏高原研究所,2022,17(2).
APA	Sim, Sojung.,Lee, Haeyoung.,Oh, Eunsil.,Kim, Sumin.,Ciais, Philippe.,...&Jeong, Sujong.(2022).Short-term reduction of regional enhancement of atmospheric CO2 in China during the first COVID-19 pandemic period.ENVIRONMENTAL RESEARCH LETTERS,17(2).
MLA	Sim, Sojung,et al."Short-term reduction of regional enhancement of atmospheric CO2 in China during the first COVID-19 pandemic period".ENVIRONMENTAL RESEARCH LETTERS 17.2(2022).