The Response in Air Quality to the Reduction of Chinese Economic Activities During the COVID-19 Outbreak
The Response in Air Quality to the Reduction of Chinese Economic Activities During the COVID-19 Outbreak
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DOI：
10.1029/2020gl088070
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发表时间：
2020-06-16
影响因子：
5.2
通讯作者：
Brasseur, Guy P.
中科院分区：
文献类型：
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作者：
Shi, Xiaoqin;Brasseur, Guy P.
在2020年初发生的新冠肺炎疫情中，中国的经济活动大幅减少，并伴随着主要空气污染物排放的强劲减少。根据中国国家环境监测中心监测站的监测结果，我们量化了2020年1月23日开始的封锁期间中国北部地表PM2.5、NO2、CO和SO2浓度的下降。我们发现，在2020年1月1日至22日和2020年1月23日至2月29日期间，表层PM(2.5)和NO(2)的平均水平分别下降了约35%和60%。与此同时，臭氧平均浓度增加了1.5-2倍。在采取了严厉措施限制冠状病毒传播的武汉市区，PM2.5、NO2和臭氧的浓度也出现了类似的变化。
During the COVID-19 outbreak that took place in early 2020, the economic activities in China were drastically reduced and accompanied by a strong reduction in the emission of primary air pollutants. On the basis of measurements made at the monitoring stations operated by the China National Environmental Monitoring Center, we quantify the reduction in surface PM2.5, NO2, CO, and SO(2)concentrations in northern China during the lockdown, which started on 23 January 2020. We find that, on the average, the levels of surface PM(2.5)and NO(2)have decreased by approximately 35% and 60%, respectively, between the period 1 and 22 January 2020 and the period 23 January and 29 February 2020. At the same time, the mean ozone concentration has increased by a factor 1.5-2. In urban area of Wuhan, where drastic measures were adopted to limit the spread of the coronavirus, similar changes in the concentrations of PM2.5, NO2, and ozone are found.