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COVID‐19 Crisis Reduces Free Tropospheric Ozone Across the Northern Hemisphere

Steinbrecht, Wolfgang; Kubistin, Dagmar; Plass‐Dülmer, Christian; Davies, Jonathan; Tarasick, David W.; Gathen, Peter von der; Deckelmann, Holger; Jepsen, Nis; Kivi, Rigel; Lyall, Norrie; Palm, Matthias; Notholt, Justus; Kois, Bogumil; Oelsner, Peter; Allaart, Marc; Piters, Ankie; Gill, Michael; Van Malderen, Roeland; Delcloo, Andy W.; Sussmann, Ralf; ... mehr

Throughout spring and summer 2020, ozone stations in the northern extratropics recorded unusually low ozone in the free troposphere. From April to August, and from 1 to 8 kilometers altitude, ozone was on average 7% (≈4 nmol/mol) below the 2000–2020 climatological mean. Such low ozone, over several months, and at so many stations, has not been observed in any previous year since at least 2000. Atmospheric composition analyses from the Copernicus Atmosphere Monitoring Service and simulations from the NASA GMI model indicate that the large 2020 springtime ozone depletion in the Arctic stratosphere contributed less than one‐quarter of the observed tropospheric anomaly. The observed anomaly is consistent with recent chemistry‐climate model simulations, which assume emissions reductions similar to those caused by the COVID‐19 crisis. COVID‐19 related emissions reductions appear to be the major cause for the observed reduced free tropospheric ozone in 2020.

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Verlagsausgabe §
DOI: 10.5445/IR/1000130156
Veröffentlicht am 02.03.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
Institut für Meteorologie und Klimaforschung - Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 03.2021
Sprache Englisch
Identifikator ISSN: 0094-8276, 1944-8007
KITopen-ID: 1000130156
HGF-Programm 12.11.13 (POF IV, LK 01) Long-term trends of global atmospheric composition
Erschienen in Geophysical research letters
Verlag Wiley
Band 48
Heft 5
Seiten e2020GL091987
Vorab online veröffentlicht am 26.02.2021
Nachgewiesen in Dimensions
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