Articles | Volume 15, issue 2
The Cryosphere, 15, 793–820, 2021
https://doi.org/10.5194/tc-15-793-2021
The Cryosphere, 15, 793–820, 2021
https://doi.org/10.5194/tc-15-793-2021

Research article 17 Feb 2021

Research article | 17 Feb 2021

Effect of small-scale snow surface roughness on snow albedo and reflectance

Terhikki Manninen et al.

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Cited articles

Anttila, K., Manninen, T., Karjalainen, T., Lahtinen, P., Riihelä, A., and Siljamo, N.: The temporal and spatial variability in submeter scale surface roughness of seasonal snow in Sodankylä Finnish Lapland in 2009–2010, J. Geophys. Res.-Atmos., 119, 9236–9252, https://doi.org/10.1002/2014JD021597, 2014. 
Aoki, T., Kuchiki, K., Niwano, M., Kodama, Y., Hosaka, M., and Tanaka, T.: Physically based snow albedo model for calculating broadband albedos and the solar heating profile in snowpack for general circulation models, J. Geophys. Res., 116, D11114, https://doi.org/10.1029/2010JD015507, 2011. 
Armstrong, R. L. and Brun, E. (Eds.): Snow and climate, Cambridge University Press, New York, USA, 2008. 
Baldridge, A. M., Hook, S. J., Grove, C. I., and Rivera, G.: The ASTER Spectral Library Version 2.0, Remote Sens. Environ., 113, 711–715, https://doi.org/10.1016/j.rse.2008.11.007, 2009. 
Beckmann, P. and Spizzicchino, A.: The Scattering of Electromagnetic Waves from Rough Surfaces, Pergamon Press, Oxford, UK, 497 pp., 1963. 
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Short summary
The primary goal of this paper is to present a model of snow surface albedo (brightness) accounting for small-scale surface roughness effects. It can be combined with any volume scattering model. The results indicate that surface roughness may decrease the albedo by about 1–3 % in midwinter and even more than 10 % during the late melting season. The effect is largest for low solar zenith angle values and lower bulk snow albedo values.