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The Cryosphere An interactive open-access journal of the European Geosciences Union
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Short summary
The angular reflection of solar radiation by snow surfaces is particularly anisotropic and highly variable. We measured the angular reflection from an aircraft using a digital camera in Antarctica in 2013/14 and studied its variability: the anisotropy increases with a lower Sun but decreases for rougher surfaces and larger snow grains. The applied methodology allows for a direct comparison with satellite observations, which generally underestimated the anisotropy measured within this study.
TC | Articles | Volume 14, issue 11
The Cryosphere, 14, 3959–3978, 2020
https://doi.org/10.5194/tc-14-3959-2020
The Cryosphere, 14, 3959–3978, 2020
https://doi.org/10.5194/tc-14-3959-2020

Research article 12 Nov 2020

Research article | 12 Nov 2020

Parameterizing anisotropic reflectance of snow surfaces from airborne digital camera observations in Antarctica

Tim Carlsen et al.

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Cited articles

Aoki, T., Aoki, T., Fukabori, M., Hachikubo, A., Tachibana, Y., and Nishio, F.: Effects of snow physical parameters on spectral albedo and bidirectional reflectance of snow surface, J. Geophys. Res., 105, 10.219–10.236, https://doi.org/10.1029/1999JD901122, 2000. a
Bourgeois, C., Ohmura, A., Schroff, K., Frei, H.-J., and Calanca, P.: IAC ETH goniospectrometer: A tool for hyperspectral HDRF measurements, J. Atmos. Ocean. Tech., 23, 573–584, https://doi.org/10.1175/JTECH1870.1, 2006a. a
Bourgeois, C. S., Calanca, P., and Ohmura, A.: A field study of the hemispherical directional reflectance factor and spectral albedo of dry snow, J. Geophys. Res., 111, D20108, https://doi.org/10.1029/2006JD007296, 2006b. a
Brest, C. and Goward, S.: Deriving surface albedo measurements from narrow-band satellite data, Int. J. Remote Sens., 8, 351–367, https://doi.org/10.1080/01431168708948646, 1987. a
Carlsen, T.: Influence of snow properties on directional surface reflectance in Antarctica, PhD thesis, Faculty of Physics and Earth Sciences, Leipzig University, available at: https://nbn-resolving.org/urn:nbn:de:bsz:15-qucosa2-319046 (last access: 8 November 2020), 2018. a, b
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Short summary
The angular reflection of solar radiation by snow surfaces is particularly anisotropic and highly variable. We measured the angular reflection from an aircraft using a digital camera in Antarctica in 2013/14 and studied its variability: the anisotropy increases with a lower Sun but decreases for rougher surfaces and larger snow grains. The applied methodology allows for a direct comparison with satellite observations, which generally underestimated the anisotropy measured within this study.
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