globalchange  > 气候变化与战略
DOI: 10.5194/tc-15-793-2021
论文题名:
Effect of small-scale snow surface roughness on snow albedo and reflectance
作者: Manninen T.; Anttila K.; Jääskeläinen E.; Riihelä A.; Peltoniemi J.; Räisänen P.; Lahtinen P.; Siljamo N.; Thölix L.; Meinander O.; Kontu A.; Suokanerva H.; Pirazzini R.; Suomalainen J.; Hakala T.; Kaasalainen S.; Kaartinen H.; Kukko A.; Hautecoeur O.; Roujean J.-L.
刊名: Cryosphere
ISSN: 19940416
出版年: 2021
卷: 15, 期:2
起始页码: 793
结束页码: 820
语种: 英语
英文关键词: albedo ; backscatter ; bidirectional reflectance ; in situ measurement ; seasonal variation ; snow cover ; surface roughness
英文摘要: 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. © Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164751
Appears in Collections:气候变化与战略

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作者单位: Finnish Meteorological Institute, Helsinki, P.O. Box 50300101, Finland; Finnish Geospatial Research Institute, National Land Survey, Geodeetinrinne 2, Masala, 02430, Finland; Department of Geography and Geology, University of Turku, Turku, 20500, Finland; Department of Built Environment, Aalto University, Espoo, 02150, Finland; Météo-France, Toulouse, France; Centre d'Etudes Spatiales de la BIOsphère (CESBIO)-UMR 5126, Toulouse, 31401, France; Exostaff GmbH/EUMETSAT, Darmstadt, Germany

Recommended Citation:
Manninen T.,Anttila K.,Jääskeläinen E.,et al. Effect of small-scale snow surface roughness on snow albedo and reflectance[J]. Cryosphere,2021-01-01,15(2)
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