Cloud impacts on photochemistry: building a climatology of photolysis rates from the Atmospheric Tomography mission

Hall, Samuel R.; Ullmann, Kirk; Prather, Michael J.; Flynn, Clare M.; Murray, Lee T.; Fiore, Arlene M.; Correa, Gustavo; Strode, Sarah A.; Steenrod, Stephen D.; Lamarque, Jean-Francois; Guth, Jonathan; Josse, Béatrice; Flemming, Johannes; Huijnen, Vincent; Abraham, N. Luke; Archibald, Alex T.

doi:https://doi.org/10.5194/acp-18-16809-2018

Articles | Volume 18, issue 22

https://doi.org/10.5194/acp-18-16809-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-18-16809-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 22

Research article

|

28 Nov 2018

Research article |

| 28 Nov 2018

Cloud impacts on photochemistry: building a climatology of photolysis rates from the Atmospheric Tomography mission

Samuel R. Hall, Kirk Ullmann, Michael J. Prather, Clare M. Flynn, Lee T. Murray, Arlene M. Fiore, Gustavo Correa, Sarah A. Strode, Stephen D. Steenrod, Jean-Francois Lamarque, Jonathan Guth, Béatrice Josse, Johannes Flemming, Vincent Huijnen, N. Luke Abraham, and Alex T. Archibald

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Final revised paper (published on 28 Nov 2018)
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Preprint (discussion started on 24 Aug 2018)
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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', Anonymous Referee #3, 14 Oct 2018
RC2: 'Review of Hall et al.', William Collins, 17 Oct 2018
RC3: 'Comments on Hall et al. ACPD 2018', Anonymous Referee #2, 19 Oct 2018
AC1: 'Authors' response to the three Reviews', Michael Prather, 01 Nov 2018

Peer-review completion

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

AR by Michael Prather on behalf of the Authors (01 Nov 2018) Author's response Manuscript

ED: Publish as is (17 Nov 2018) by Yves Balkanski

AR by Michael Prather on behalf of the Authors (17 Nov 2018) Author's response Manuscript

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Short summary

Photolysis (J rates) initiates and drives atmospheric chemistry, and Js are perturbed by factors of 2 by clouds. The NASA Atmospheric Tomography (ATom) Mission provides the first comprehensive observations on how clouds perturb Js through the remote Pacific and Atlantic basins. We compare these cloud-perturbation J statistics with those from nine global chemistry models. While basic patterns agree, there is a large spread across models, and all lack some basic features of the observations.