Global tropospheric ozone responses to reduced NOxemissions linked to the COVID-19 worldwide lockdowns
| Autor: | Henk Eskes, Jessica L. Neu, Takashi Sekiya, Kengo Sudo, Greg Osterman, Masayuki Takigawa, Kevin W. Bowman, Kazuyuki Miyazaki |
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| Rok vydání: | 2021 |
| Předmět: |
Multidisciplinary
010504 meteorology & atmospheric sciences Coronavirus disease 2019 (COVID-19) Pollutant emissions 010501 environmental sciences Radiative forcing Atmospheric sciences High ozone 01 natural sciences chemistry.chemical_compound chemistry Environmental science Oxidative capacity Tropospheric ozone Air quality index NOx 0105 earth and related environmental sciences |
| Zdroj: | Science Advances. 7 |
| ISSN: | 2375-2548 |
| DOI: | 10.1126/sciadv.abf7460 |
| Popis: | Efforts to stem the transmission of coronavirus disease 2019 (COVID-19) led to rapid, global ancillary reductions in air pollutant emissions. Here, we quantify the impact on tropospheric ozone using a multiconstituent chemical data assimilation system. Anthropogenic NOGlobal Tropospheric Ozone Responses to Reduced Noₓ Emissions Linked to the COVID-19 Worldwide Lockdowns emissions dropped by at least 15% globally and 18 to 25% regionally in April and May 2020, which decreased free tropospheric ozone by up to 5 parts per billion, consistent with independent satellite observations. The global total tropospheric ozone burden declined by 6TgO₃ (∼2%) in May and June 2020, largely due to emission reductions in Asia and the Americas that were amplified by regionally high ozone production efficiencies (up to 4 TgO₃/TgN). Our results show that COVID-19 mitigation left a global atmospheric imprint that altered atmospheric oxidative capacity and climate radiative forcing, providing a test of the efficacy of NOₓ emissions controls for co-benefiting air quality and climate. |
| Databáze: | OpenAIRE |
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