Articles | Volume 22, issue 18
https://doi.org/10.5194/acp-22-12221-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-22-12221-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
21 Sep 2022
Research article |
| 21 Sep 2022
| 21 Sep 2022
Robust evidence for reversal of the trend in aerosol effective climate forcing
Johannes Quaas
CORRESPONDING AUTHOR
Institute for Meteorology, Universität Leipzig, Leipzig, Germany
Hailing Jia
Institute for Meteorology, Universität Leipzig, Leipzig, Germany
Chris Smith
School of Earth and Environment, University of Leeds, Leeds, UK
International Institute for Applied Systems Analysis, Laxenburg, Austria
Anna Lea Albright
Laboratoire de Météorologie Dynamique, Institut Pierre Simon Laplace, Sorbonne Université, Paris, France
Wenche Aas
Norwegian Institute for Air Research, Kjeller, Norway
Nicolas Bellouin
Institut Pierre-Simon Laplace, Sorbonne Université/CNRS, Paris, France
Department of Meteorology, University of Reading, Reading, UK
Olivier Boucher
Institut Pierre-Simon Laplace, Sorbonne Université/CNRS, Paris, France
Marie Doutriaux-Boucher
EUMETSAT, Darmstadt, Germany
Piers M. Forster
School of Earth and Environment, University of Leeds, Leeds, UK
Daniel Grosvenor
School of Earth and Environment, University of Leeds, Leeds, UK
Stuart Jenkins
Atmospheric, Oceanic and Planetary Physics, University of Oxford, Oxford, UK
Zbigniew Klimont
International Institute for Applied Systems Analysis, Laxenburg, Austria
Norman G. Loeb
NASA Langley Research Center, Hampton, USA
Xiaoyan Ma
School of Atmospheric Physics, Nanjing University of Information Science & Technology, Nanjing, China
Vaishali Naik
Geophysical Fluid Dynamics Laboratory, Princeton, USA
Fabien Paulot
Geophysical Fluid Dynamics Laboratory, Princeton, USA
Philip Stier
Atmospheric, Oceanic and Planetary Physics, University of Oxford, Oxford, UK
Martin Wild
Department of Environmental Systems Science, ETH Zürich, Zurich, Switzerland
Gunnar Myhre
CICERO, Oslo, Norway
Michael Schulz
Norwegian Meteorological Institute, Oslo, Norway
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Discussed (final revised paper)
Latest update: 29 May 2025
Short summary
Pollution particles cool climate and offset part of the global warming. However, they are washed out by rain and thus their effect responds quickly to changes in emissions. We show multiple datasets to demonstrate that aerosol emissions and their concentrations declined in many regions influenced by human emissions, as did the effects on clouds. Consequently, the cooling impact on the Earth energy budget became smaller. This change in trend implies a relative warming.
Pollution particles cool climate and offset part of the global warming. However, they are washed...
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