Spatiotemporal changes in global nitrogen dioxide emission due to COVID-19 mitigation policies
Spatiotemporal changes in global nitrogen dioxide emission due to COVID-19 mitigation policies
复制标题
DOI:
10.1016/j.scitotenv.2021.146027
复制
发表时间:
2021-02-22
期刊:
影响因子:
--
通讯作者:
Yang C
中科院分区:
文献类型:
--
作者:
Liu Q;Malarvizhi AS;Liu W;Xu H;Harris JT;Yang J;Duffy DQ;Little MM;Sha D;Lan H;Yang C
This paper investigates spatiotemporal changes of nitrogen dioxide (NO2) tropospheric vertical column density due to the COVID-19 pandemic using satellite observations before, during and after the lockdown (hereafter referred as the pre-, peri- and post-periods) in six different countries: China, South Africa, Brazil, India, the UK and the US, and compare these periods with 2019 as well as mean climatology from 2010 to 2019. We observe significant declines in relative differences (RDs) from the pre- to peri-period (as compared with the 10-year climatology) in most study countries including China, South Africa, India, and the UK by 15, 17, 8 and 7% respectively. The US does not demonstrate significant decline with RD difference relatively small at just 2%. Meanwhile, although the 2020 RD of Brazil is 7% lower than 2010–2019, this trend is quite similar to that of 2019 (20% vs 23%). In the post-period of 2020, the NO2 columns rebound in most target countries: China, US, South Africa, Brazil and UK, with similar RDs relative to the corresponding pre-period as compared with 2019 and 2010–2019. In contrast, NO in India continues to be influenced by the ongoing COVID-19 crisis with pre-to-post RD 8% lower than the average of previous 10 years.
登录
查看更多内容
影响因子:
10.4
作者:
Lee K;Xue J;Geyh AS;Ozkaynak H;Leaderer BP;Weschler CJ;Spengler JD
通讯作者:
Spengler JD
影响因子:
11.4
作者:
Lee, Hyung Joo;Koutrakis, Petros
通讯作者:
Koutrakis, Petros
影响因子:
5
作者:
Liu, Qian;Sha, Dexuan;Yang, Chaowei
通讯作者:
Yang, Chaowei
影响因子:
4.4
作者:
Ionov, D. V.;Timofeyev, Y. M.;Kroon, M.
通讯作者:
Kroon, M.
影响因子:
6.3
作者:
Li, Jianfeng;Wang, Yuhang
通讯作者:
Wang, Yuhang