On the phenomenon of the blue sun

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

doi:https://doi.org/10.5194/cp-17-969-2021

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:

Interdisciplinary studies of volcanic impacts on climate and...

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

| Highlight paper

|

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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Final revised paper (published on 30 Apr 2021)
Preprint (discussion started on 22 Sep 2020)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

RC1: 'Review of "On the phenomenon of the blue Sun"', Anonymous Referee #1, 28 Oct 2020
- AC1: 'Reply on RC1', Christian von Savigny, 09 Feb 2021
RC2: 'referee report', Anonymous Referee #2, 16 Dec 2020
- AC2: 'Reply on RC2', Christian von Savigny, 09 Feb 2021

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

ED: Publish subject to minor revisions (review by editor) (21 Feb 2021) by Matthew Toohey

AR by Christian von Savigny on behalf of the Authors (01 Mar 2021) Author's response Author's tracked changes Manuscript

ED: Publish subject to technical corrections (18 Mar 2021) by Matthew Toohey

AR by Christian von Savigny on behalf of the Authors (18 Mar 2021) Manuscript

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.