The impact of COVID-19 lockdown on atmospheric CO(2) in Xi'an, China.
The impact of COVID-19 lockdown on atmospheric CO(2) in Xi'an, China.
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COVID-19 封锁对中国西安大气二氧化碳的影响
DOI：
10.1016/j.envres.2021.111208
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发表时间：
2021-06
影响因子：
8.3
通讯作者：
Hou Y
中科院分区：
文献类型：
--
作者：
Wu S;Zhou W;Xiong X;Burr GS;Cheng P;Wang P;Niu Z;Hou Y
为控制新型冠状病毒病（COVID-19）传播而采取的封锁措施极大地限制了能源消耗和碳排放。许多研究人员使用统计方法研究了封锁对碳排放的影响。然而，封锁对城市范围内大气二氧化碳（CO2）的影响仍不清楚。在这里，我们提供二氧化碳浓度和碳同位素 (δ13C) 测量结果，以评估 COVID-19 控制措施对中国西安大气二氧化碳的影响。我们发现，封锁期间的二氧化碳浓度比正常时期（春节前，2020年1月25日至2月4日）低7.5%。封锁期间观察到的二氧化碳过量（总二氧化碳减去背景二氧化碳）比正常期间低52.3%，比排除天气影响后估计的二氧化碳过量低35.7%。基林图显示，相比之下，封锁期间二氧化碳浓度和 δ13C 相关性较弱 (R2 = 0.18)，反映了交通和工业排放减少所带来的二氧化碳来源的变化。我们的研究还表明，封锁期间大气二氧化碳浓度的急剧减少是短暂的，并在解除封锁措施后的几个月内恢复到正常水平。
Lockdown measures to control the spread of the novel coronavirus disease (COVID-19) sharply limited energy consumption and carbon emissions. The lockdown effect on carbon emissions has been studied by many researchers using statistical approaches. However, the lockdown effect on atmospheric carbon dioxide (CO2) on an urban scale remains unclear. Here we present CO2 concentration and carbon isotopic (δ13C) measurements to assess the impact of COVID-19 control measures on atmospheric CO2 in Xi'an, China. We find that CO2 concentrations during the lockdown period were 7.5% lower than during the normal period (prior to the Spring Festival, Jan 25 to Feb 4, 2020). The observed CO2excess (total CO2 minus background CO2) during the lockdown period was 52.3% lower than that during the normal period, and 35.7% lower than the estimated CO2excess with the effect of weather removed. A Keeling plot shows that in contrast CO2 concentrations and δ13C were weakly correlated (R2 = 0.18) during the lockdown period, reflecting a change in CO2 sources imposed by the curtailment of traffic and industrial emissions. Our study also show that the sharp reduction in atmospheric CO2 during lockdown were short-lived, and returned to normal levels within months after lockdown measures were lifted.
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影响因子：
8.2
作者：
Gielen, Dolf;Boshell, Francisco;Gorini, Ricardo
通讯作者：
Gorini, Ricardo
影响因子：
5.2
作者：
Shi, Xiaoqin;Brasseur, Guy P.
通讯作者：
Brasseur, Guy P.
影响因子：
7.4
作者：
Sher, Farooq;Iqbal, Sania Zafar;Rashid, Tazien
通讯作者：
Rashid, Tazien
影响因子：
3.9
作者：
Pigliautile, Ilaria;Marseglia, Guido;Pisello, Anna Laura
通讯作者：
Pisello, Anna Laura
影响因子：
30.7
作者：
Le Quere, Corinne;Jackson, Robert B.;Peters, Glen P.
通讯作者：
Peters, Glen P.