Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 17, issue 11
Articles | Volume 17, issue 11
https://doi.org/10.5194/acp-17-6865-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/acp-17-6865-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 17, issue 11
Research article
 | 
12 Jun 2017
Research article |  | 12 Jun 2017

Disk and circumsolar radiances in the presence of ice clouds

Päivi Haapanala, Petri Räisänen, Greg M. McFarquhar, Jussi Tiira, Andreas Macke, Michael Kahnert, John DeVore, and Timo Nousiainen

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Short summary
The dependence of solar-disk and circumsolar radiances on ice cloud properties is studied with a Monte Carlo radiative transfer model. Ice crystal roughness (or more generally, non-ideality) is found to be the most important parameter influencing the circumsolar radiance, and ice crystal sizes and shapes also play significant roles. When comparing with radiances measured with the SAM instrument, rough ice crystals reproduce the measurements better than idealized smooth ice crystals do.
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