Articles | Volume 18, issue 22
https://doi.org/10.5194/acp-18-16809-2018
https://doi.org/10.5194/acp-18-16809-2018
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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Latest update: 10 Dec 2024
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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.
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