Steinbrecht Wolfgang, Kubistin Dagmar, Plass-Dülmer Christian, Davies Jonathan, Tarasick David W, von der Gathen Peter, 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, Mahieu Emmanuel, Servais Christian, Romanens Gonzague, Stübi Rene, Ancellet Gerard, Godin-Beekmann Sophie, Yamanouchi Shoma, Strong Kimberly, Johnson Bryan, Cullis Patrick, Petropavlovskikh Irina, Hannigan James W, Hernandez Jose-Luis, Diaz Rodriguez Ana, Nakano Tatsumi, Chouza Fernando, Leblanc Thierry, Torres Carlos, Garcia Omaira, Röhling Amelie N, Schneider Matthias, Blumenstock Thomas, Tully Matt, Paton-Walsh Clare, Jones Nicholas, Querel Richard, Strahan Susan, Stauffer Ryan M, Thompson Anne M, Inness Antje, Engelen Richard, Chang Kai-Lan, Cooper Owen R
Deutscher Wetterdienst Hohenpeißenberg Germany.
Environment and Climate Change Canada Toronto ONT Canada.
Geophys Res Lett. 2021 Mar 16;48(5):e2020GL091987. doi: 10.1029/2020GL091987. Epub 2021 Feb 26.
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.
在2020年整个春季和夏季，北温带的臭氧监测站记录到对流层自由大气中的臭氧含量异常低。从4月到8月，在海拔1至8公里的高度，臭氧平均比2000 - 2020年的气候平均值低7%（约4纳摩尔/摩尔）。自至少2000年以来，此前任何一年都未曾观测到如此低的臭氧水平持续数月且涉及如此多监测站的情况。哥白尼大气监测服务中心的大气成分分析以及美国国家航空航天局（NASA）GMI模型的模拟结果表明，2020年春季北极平流层臭氧的大幅损耗对观测到的对流层异常的贡献不到四分之一。观测到的异常与近期的化学 - 气候模型模拟结果一致，这些模拟假设了与新冠疫情危机导致的类似的排放减少情况。与新冠疫情相关的排放减少似乎是2020年观测到的对流层自由大气中臭氧减少的主要原因。
