Anthropogenic CO 2 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
Anthropogenic CO 2 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
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由于 COVID-19 大流行，日本东京市区人为 CO 2 排放量变化：2020 年 4 月至 5 月紧急状态期间的案例研究
DOI：
10.1029/2021gl092600
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发表时间：
2021
影响因子：
5.2
通讯作者：
K.
中科院分区：
文献类型：
--
作者：
Sugawara;H.;Ishidoya;S.;Terao;Y.;Takane;Y.;Kikegawa;Y. and Nakajima;K.
利用日本东京居民区(约4×105平方米)的大气观测资料，研究了新冠肺炎疫情对城市二氧化碳排放的影响。与过去几年同期相比，2020年4-5月测得的CO2通量下降了20%±13.3%。O2和CO2的交换率反映了排放源的分解；通量的减少是由于液体燃料消耗的减少，而家用气体燃料消耗略有增加；这也得到了同时测量的CO/CO2浓度比的支持。流量足迹区域的人类活动分析支持了观察结果；汽车流量减少，家庭汽油消耗量增加。
The influence of the COVID‐19 pandemic on urban CO2emissions was investigated using atmospheric observations in the residential area (approximately 4 × 105m2) in Tokyo, Japan. The measured CO2flux decreased by 20% ± 3% in April–May 2020 compared to the same period during the past few years. The exchange ratio of O2and CO2revealed 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:CO2concentration ratio. A human‐activity analysis in the flux footprint area supported the results of the observation; car traffic decreased and household gas consumption increased.