The potential impacts of a sulfur- and halogen-rich supereruption such as Los Chocoyos on the atmosphere and climate

Brenna, Hans; Kutterolf, Steffen; Mills, Michael J.; Krüger, Kirstin

doi:https://doi.org/10.5194/acp-20-6521-2020

Articles | Volume 20, issue 11

https://doi.org/10.5194/acp-20-6521-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

The Model Intercomparison Project on the climatic response...

https://doi.org/10.5194/acp-20-6521-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 20, issue 11

Research article

|

05 Jun 2020

Research article |

| 05 Jun 2020

The potential impacts of a sulfur- and halogen-rich supereruption such as Los Chocoyos on the atmosphere and climate

Hans Brenna, Steffen Kutterolf, Michael J. Mills, and Kirstin Krüger

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Final revised paper (published on 05 Jun 2020)
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Preprint (discussion started on 24 Sep 2019)
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Interactive discussion

Status: closed

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

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RC1: 'Review of Brenna et al.', Alan Robock, 27 Oct 2019
RC2: 'Review', Anonymous Referee #2, 04 Nov 2019
RC3: '?', Anonymous Referee #3, 10 Nov 2019
AC1: 'Author response to reviewer comments', Hans Brenna, 17 Feb 2020

Peer-review completion

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

AR by Hans Brenna on behalf of the Authors (10 Mar 2020) Author's response Manuscript

ED: Publish subject to minor revisions (review by editor) (31 Mar 2020) by Slimane Bekki

AR by Hans Brenna on behalf of the Authors (07 Apr 2020) Author's response Manuscript

ED: Publish as is (09 Apr 2020) by Slimane Bekki

AR by Hans Brenna on behalf of the Authors (16 Apr 2020) Manuscript

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Short summary

The Los Chocoyos supereruption (84 000 years ago) in Guatemala was one of the largest volcanic events of the last 100 000 years. This eruption released enormous amounts of sulfur, which cooled the climate, as well as chlorine and bromine, which destroyed the ozone in the stratosphere. We have simulated this eruption by using an advanced chemistry–climate model. We found a collapse in the ozone layer lasting more than 10 years, increased surface–UV radiation, and a 30-year climate-cooling period.