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| NOx Emission Reduction and Recovery during COVID-19 in East China | |
| Zhang, Ruixiong1,2; Wang, Yuhang1; Zhang, Yuzhong3,4; Lin, Haipeng5; Feng, Xu6; Fu, Tzung-May7 | |
| 2020-04 | |
| 发表期刊 | ATMOSPHERE
 |
| EISSN | 2073-4433 |
| 摘要 | Since its first confirmed case at the end of 2019, COVID-19 has become a global pandemic in three months with more than 1.4 million confirmed cases worldwide, as of early April 2020. Quantifying the changes of pollutant emissions due to COVID-19 and associated governmental control measures is crucial to understand its impacts on economy, air pollution, and society. We used the WRF-GC model and the tropospheric NO2 column observations retrieved by the TROPOMI instrument to derive the top-down NOx emission change estimation between the three periods: P1 (January 1st to January 22nd, 2020), P2 (January 23rd, Wuhan lockdown, to February 9th, 2020), and P3 (February 10th, back-to-work day, to March 12th, 2020). We found that NOx emissions in East China averaged during P2 decreased by 50% compared to those averaged during P1. The NOx emissions averaged during P3 increased by 26% compared to those during P2. Most provinces in East China gradually regained some of their NOx emissions after February 10, the official back-to-work day, but NOx emissions in most provinces have not yet to return to their previous levels in early January. NOx emissions in Wuhan, the first epicenter of COVID-19, had no sign of emission recovering by March 12. A few provinces, such as Zhejiang and Shanxi, have recovered fast, with their averaged NOx emissions during P3 almost back to pre-lockdown levels. |
| 关键词 | COVID-19 NOx emission air pollution satellite retrieval WRF-GC GEOS-Chem |
| DOI | 10.3390/atmos11040433 |
| WOS关键词 | ANTHROPOGENIC EMISSIONS ; UNCERTAINTIES ; FRAMEWORK ; POLLUTION ; CLIMATE ; QUALITY ; TROPOMI ; TRENDS ; SPACE ; MODEL |
| WOS研究方向 | Meteorology & Atmospheric Sciences |
| WOS类目 | Meteorology & Atmospheric Sciences |
| 出版者 | MDPI |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 专题 | 新冠肺炎 循证社会科学证据集成 |
| 作者单位 | 1.Georgia Inst Technol; 2.ClimaCell Inc; 3.Westlake Univ; 4.Westlake Inst Adv Study; 5.Harvard Univ; 6.Peking Univ; 7.Southern Univ Sci & Technol |
| 推荐引用方式 GB/T 7714 | Zhang, Ruixiong,Wang, Yuhang,Zhang, Yuzhong,et al. NOx Emission Reduction and Recovery during COVID-19 in East China[J]. ATMOSPHERE,2020. |
| APA | Zhang, Ruixiong,Wang, Yuhang,Zhang, Yuzhong,Lin, Haipeng,Feng, Xu,&Fu, Tzung-May.(2020).NOx Emission Reduction and Recovery during COVID-19 in East China.ATMOSPHERE. |
| MLA | Zhang, Ruixiong,et al."NOx Emission Reduction and Recovery during COVID-19 in East China".ATMOSPHERE (2020). |
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| Zhang-2020-NOx Emiss（5930KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 下载 | |
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