Anthropogenic CO<sub>2</sub> Emissions Changes in An Urban Area of Tokyo, Japan, Due to the COVID-19 Pandemic: A Case Study during the State of Emergency in April–May 2020

doi:10.1029/2021GL092600

The influence of the COVID-19 pandemic on urban CO₂ emissions was investigated using atmospheric observations in the residential area (approximately 4×10⁵ m²) in Tokyo, Japan. The measured CO₂ flux decreased by 20 ± 3% in April–May 2020 compared to the same period during the past few years. The exchange ratio of O₂ and CO₂ revealed the breakdown of emission sources; the decrease of flux was due to the decrease in liquid fuel consumption, while household gas fuel consumption was slightly increased; this was also supported by the simultaneously measured CO:CO₂ concentration ratio. A human-activity analysis in the flux footprint area supported the observations results; car traffic decreased and household gas consumption increased.

DOI	10.1029/2021GL092600
	Anthropogenic CO₂ Emissions Changes in An Urban Area of Tokyo, Japan, Due to the COVID-19 Pandemic: A Case Study during the State of Emergency in April–May 2020
	H. Sugawara; S. Ishidoya; Y. Terao; Y. Takane; Y. Kikegawa; K. Nakajima
	2021-07-30
发表期刊	Geophysical Research Letters
出版年	2021
英文摘要	The influence of the COVID-19 pandemic on urban CO₂ emissions was investigated using atmospheric observations in the residential area (approximately 4×10⁵ m²) in Tokyo, Japan. The measured CO₂ flux decreased by 20 ± 3% in April–May 2020 compared to the same period during the past few years. The exchange ratio of O₂ and CO₂ revealed the breakdown of emission sources; the decrease of flux was due to the decrease in liquid fuel consumption, while household gas fuel consumption was slightly increased; this was also supported by the simultaneously measured CO:CO₂ concentration ratio. A human-activity analysis in the flux footprint area supported the observations results; car traffic decreased and household gas consumption increased.
领域	气候变化
URL	查看原文
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/335366
专题	气候变化
推荐引用方式 GB/T 7714	H. Sugawara,S. Ishidoya,Y. Terao,等. Anthropogenic CO₂ Emissions Changes in An Urban Area of Tokyo, Japan, Due to the COVID-19 Pandemic: A Case Study during the State of Emergency in April–May 2020[J]. Geophysical Research Letters,2021.
APA	H. Sugawara,S. Ishidoya,Y. Terao,Y. Takane,Y. Kikegawa,&K. Nakajima.(2021).Anthropogenic CO₂ Emissions Changes in An Urban Area of Tokyo, Japan, Due to the COVID-19 Pandemic: A Case Study during the State of Emergency in April–May 2020.Geophysical Research Letters.
MLA	H. Sugawara,et al."Anthropogenic CO₂ Emissions Changes in An Urban Area of Tokyo, Japan, Due to the COVID-19 Pandemic: A Case Study during the State of Emergency in April–May 2020".Geophysical Research Letters (2021).

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