Details

Autor(en) / Beteiligte

• Laughner, Joshua L
• Neu, Jessica L
• Schimel, David
• Wennberg, Paul O
• Barsanti, Kelley
• Bowman, Kevin W
• Chatterjee, Abhishek
• Croes, Bart E
• Fitzmaurice, Helen L
• Henze, Daven K
• Kim, Jinsol
• Kort, Eric A
• Liu, Zhu
• Miyazaki, Kazuyuki
• Turner, Alexander J
• Anenberg, Susan
• Avise, Jeremy
• Cao, Hansen
• Crisp, David
• de Gouw, Joost
• Eldering, Annmarie
• Fyfe, John C
• Goldberg, Daniel L
• Gurney, Kevin R
• Hasheminassab, Sina
• Hopkins, Francesca
• Ivey, Cesunica E
• Jones, Dylan B A
• Liu, Junjie
• Lovenduski, Nicole S
• Martin, Randall V
• McKinley, Galen A
• Ott, Lesley
• Poulter, Benjamin
• Ru, Muye
• Sander, Stanley P
• Swart, Neil
• Yung, Yuk L
• Zeng, Zhao-Cheng

Titel

Societal shifts due to COVID-19 reveal large-scale complexities and feedbacks between atmospheric chemistry and climate change

Ist Teil von

• Proceedings of the National Academy of Sciences - PNAS, 2021-11, Vol.118 (46), p.1

Ort / Verlag

United States: National Academy of Sciences

Erscheinungsjahr

2021

Link zum Volltext

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• The COVID-19 global pandemic and associated government lockdowns dramatically altered human activity, providing a window into how changes in individual behavior, enacted en masse, impact atmospheric composition. The resulting reductions in anthropogenic activity represent an unprecedented event that yields a glimpse into a future where emissions to the atmosphere are reduced. Furthermore, the abrupt reduction in emissions during the lockdown periods led to clearly observable changes in atmospheric composition, which provide direct insight into feedbacks between the Earth system and human activity. While air pollutants and greenhouse gases share many common anthropogenic sources, there is a sharp difference in the response of their atmospheric concentrations to COVID-19 emissions changes, due in large part to their different lifetimes. Here, we discuss several key takeaways from modeling and observational studies. First, despite dramatic declines in mobility and associated vehicular emissions, the atmospheric growth rates of greenhouse gases were not slowed, in part due to decreased ocean uptake of CO and a likely increase in CH lifetime from reduced NO emissions. Second, the response of O to decreased NO emissions showed significant spatial and temporal variability, due to differing chemical regimes around the world. Finally, the overall response of atmospheric composition to emissions changes is heavily modulated by factors including carbon-cycle feedbacks to CH and CO , background pollutant levels, the timing and location of emissions changes, and climate feedbacks on air quality, such as wildfires and the ozone climate penalty.