Abrupt declines in tropospheric nitrogen dioxide over China after the outbreak of COVID-19

• Tác giả: Sungyeon Choi, Henk Eskes, Oliver P Hauser, Joanna Joiner, Nickolay A Krotkov, Lok N Lamsal, Pieternel Levelt, Can Li, Fei Liu, Aaron Page, Sarah A Strode, Ronald van der A, Pepijn Veefkind, Yasuko Yoshida, Bo Zheng
• Ngôn ngữ: eng
• Ký hiệu phân loại: 614.71 Forensic medicine; incidence of injuries, wounds, disease; public preventive medicine
• Thông tin xuất bản: 2020
• Bộ sưu tập: Metadata
• ID: 164218

Tóm tắt

China's policy interventions to reduce the spread of the coronavirus disease 2019 have environmental and economic impacts. Tropospheric nitrogen dioxide indicates economic activities, as nitrogen dioxide is primarily emitted from fossil fuel consumption. Satellite measurements show a 48% drop in tropospheric nitrogen dioxide vertical column densities from the 20 days averaged before the 2020 Lunar New Year to the 20 days averaged after. This is 20% larger than that from recent years. We relate to this reduction to two of the government's actions: the announcement of the first report in each province and the date of a province's lockdown. Both actions are associated with nearly the same magnitude of reductions. Our analysis offers insights into the unintended environmental and economic consequences through reduced economic activities.Comment: 29 pages, 11 figures