Articles | Volume 14, issue 5
The Cryosphere, 14, 1651–1672, 2020
https://doi.org/10.5194/tc-14-1651-2020
The Cryosphere, 14, 1651–1672, 2020
https://doi.org/10.5194/tc-14-1651-2020

Research article 27 May 2020

Research article | 27 May 2020

Snow albedo sensitivity to macroscopic surface roughness using a new ray-tracing model

Fanny Larue et al.

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ED: Publish subject to minor revisions (review by editor) (17 Mar 2020) by Mark Flanner
AR by Fanny Larue on behalf of the Authors (23 Mar 2020)  Author's response    Manuscript
ED: Publish as is (31 Mar 2020) by Mark Flanner
AR by Fanny Larue on behalf of the Authors (08 Apr 2020)  Author's response
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Short summary
The effect of surface roughness on snow albedo is often overlooked, although a small change in albedo may strongly affect the surface energy budget. By carving artificial roughness in an initially smooth snowpack, we highlight albedo reductions of 0.03–0.04 at 700 nm and 0.06–0.10 at 1000 nm. A model using photon transport is developed to compute albedo considering roughness and applied to understand the impact of roughness as a function of snow properties and illumination conditions.