scholarly journals Modeling optical properties of particles with small-scale surface roughness: combination of group theory with a perturbation approach

2011 ◽  
Vol 19 (12) ◽  
pp. 11138 ◽  
Author(s):  
Michael Kahnert ◽  
Tom Rother
Keyword(s):  
Surface Roughness ◽  
Optical Properties ◽  
Group Theory ◽  
Small Scale ◽  
Perturbation Approach ◽  
Scale Surface

Sea ice small-scale surface roughness estimation based on AMSR-E observations

2013 ◽  
Vol 34 (12) ◽  
pp. 4425-4448 ◽  
Author(s):  
Haibo Bi ◽  
Xiaofeng Yang ◽  
Ziwei Li ◽  
Xuan Zhou
Keyword(s):  
Surface Roughness ◽  
Sea Ice ◽  
Small Scale ◽  
Surface Roughness Estimation ◽  
Scale Surface

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

2021 ◽  
Vol 15 (2) ◽  
pp. 793-820
Author(s):  
Terhikki Manninen ◽  
Kati Anttila ◽  
Emmihenna Jääskeläinen ◽  
Aku Riihelä ◽  
Jouni Peltoniemi ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Laser Scanner ◽  
Small Scale ◽  
Snow Surface ◽  
Roughness Effects ◽  
Bidirectional Reflectance Factor ◽  
Reflectance Factor ◽  
Bulk Volume ◽  
The Impact ◽  
Scale Surface

Abstract. The primary goal of this paper is to present a model of snow surface albedo accounting for small-scale surface roughness effects. The model is based on photon recollision probability, and it can be combined with existing bulk volume albedo models, such as Two-streAm Radiative TransfEr in Snow (TARTES). The model is fed with in situ measurements of surface roughness from plate profile and laser scanner data, and it is evaluated by comparing the computed albedos with observations. It provides closer results to empirical values than volume-scattering-based albedo simulations alone. The impact of surface roughness on albedo increases with the progress of the melting season and is larger for larger solar zenith angles. In absolute terms, small-scale surface roughness can decrease the total albedo by up to about 0.1. As regards the bidirectional reflectance factor (BRF), it is found that surface roughness increases backward scattering especially for large solar zenith angle values.

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