Climate of the Past
Climate of the Past
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Articles | Volume 17, issue 2
Articles | Volume 17, issue 2
https://doi.org/10.5194/cp-17-969-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/cp-17-969-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 17, issue 2
Research article
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30 Apr 2021
Research article | Highlight paper |  | 30 Apr 2021

On the phenomenon of the blue sun

Nellie Wullenweber, Anna Lange, Alexei Rozanov, and Christian von Savigny

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Short summary
This study investigates the physical processes leading to the rare phenomenon of the sun appearing blue or green. The phenomenon is caused by anomalous scattering by, e.g., volcanic or forest fire aerosols. Unlike most other studies, our study includes a full treatment of the effect of Rayleigh scattering on the colour of the sun. We investigate different factors and revisit a historic example, i.e. the Canadian forest fires in 1950, that led to blue sun events in different European countries.
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Special issue
Interdisciplinary studies of volcanic impacts on climate and...