Mechanisms of Arctic amplification and Arctic climate change are difficult to pinpoint, and current climate models do not represent the complex local processes and feedbacks at play, in particular for aerosol–climate interactions. This Perspective highlights the role of aerosols in contemporary Arctic climate change and stresses that the Arctic natural aerosol baseline is changing fast and its regional characteristics are very diverse. We argue that to improve understanding of present day and future Arctic, more detailed knowledge is needed on natural Arctic aerosol emissions, their evolution and transport, and the effects on cloud microphysics. In particular, observation and modelling work should focus on the sensitivity of aerosol–climate interactions to the rapidly evolving base state of the Arctic.
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Increased aerosol concentrations in the High Arctic attributable to changing atmospheric transport patterns
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J.S. is the Ingvar Kamprad Chair for Extreme Environment Research, sponsored by Ferring Pharmaceuticals, and acknowledges funding from the Swiss National Science Foundation (projects 200021_188478 and 200021_169090). A.E. would like to acknowledge the Swedish Research Council (Vetenskapsrådet), DNR2015-05318 and the European Union’s Horizon 2020 programme, grant agreement no. 821205. P.Z. was supported by the Swedish Research Council (Vetenskapsrådet starting grant, project no. 2018-05045). P.Z. and A.E. also acknowledge support from the Knut and Alice Wallenberg Foundation, project Arctic Climate Across Scales (ACAS, project no. 2016.0024).
The authors declare no competing interests.
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Schmale, J., Zieger, P. & Ekman, A.M.L. Aerosols in current and future Arctic climate. Nat. Clim. Chang. 11, 95–105 (2021). https://doi.org/10.1038/s41558-020-00969-5
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