气候变化领域集成服务门户(CCPortal): Effect of small-scale snow surface roughness on snow albedo and reflectance

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DOI	10.5194/tc-15-793-2021
	Effect of small-scale snow surface roughness on snow albedo and reflectance
	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.
发表日期	2021
ISSN	19940416
起始页码	793
结束页码	820
卷号	15 期号:2
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.
英文关键词	albedo; backscatter; bidirectional reflectance; in situ measurement; seasonal variation; snow cover; surface roughness
语种	英语
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202373
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
推荐引用方式 GB/T 7714	Manninen T.,Anttila K.,Jääskeläinen E.,et al. Effect of small-scale snow surface roughness on snow albedo and reflectance[J],2021,15(2).
APA	Manninen T..,Anttila K..,Jääskeläinen E..,Riihelä A..,Peltoniemi J..,...&Roujean J.-L..(2021).Effect of small-scale snow surface roughness on snow albedo and reflectance.Cryosphere,15(2).
MLA	Manninen T.,et al."Effect of small-scale snow surface roughness on snow albedo and reflectance".Cryosphere 15.2(2021).