Effect of small-scale snow surface roughness on snow albedo and reflectance
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 (TARTE...
Published in: | The Cryosphere |
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Format: | Article in Journal/Newspaper |
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Copernicus Publications
2021
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Online Access: | https://doi.org/10.5194/tc-15-793-2021 https://tc.copernicus.org/articles/15/793/2021/tc-15-793-2021.pdf https://doaj.org/article/773767398c2a4896a43eed6edbaa3dac |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:773767398c2a4896a43eed6edbaa3dac 2023-05-15T18:32:18+02:00 Effect of small-scale snow surface roughness on snow albedo and reflectance T. Manninen K. Anttila E. Jääskeläinen A. Riihelä J. Peltoniemi P. Räisänen P. Lahtinen N. Siljamo L. Thölix O. Meinander A. Kontu H. Suokanerva R. Pirazzini J. Suomalainen T. Hakala S. Kaasalainen H. Kaartinen A. Kukko O. Hautecoeur J.-L. Roujean 2021-02-01 https://doi.org/10.5194/tc-15-793-2021 https://tc.copernicus.org/articles/15/793/2021/tc-15-793-2021.pdf https://doaj.org/article/773767398c2a4896a43eed6edbaa3dac en eng Copernicus Publications doi:10.5194/tc-15-793-2021 1994-0416 1994-0424 https://tc.copernicus.org/articles/15/793/2021/tc-15-793-2021.pdf https://doaj.org/article/773767398c2a4896a43eed6edbaa3dac undefined The Cryosphere, Vol 15, Pp 793-820 (2021) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2021 fttriple https://doi.org/10.5194/tc-15-793-2021 2023-01-22T17:32:51Z 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. Article in Journal/Newspaper The Cryosphere Unknown The Cryosphere 15 2 793 820 |
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language |
English |
topic |
geo envir |
spellingShingle |
geo envir T. Manninen K. Anttila E. Jääskeläinen A. Riihelä J. Peltoniemi P. Räisänen P. Lahtinen N. Siljamo L. Thölix O. Meinander A. Kontu H. Suokanerva R. Pirazzini J. Suomalainen T. Hakala S. Kaasalainen H. Kaartinen A. Kukko O. Hautecoeur J.-L. Roujean Effect of small-scale snow surface roughness on snow albedo and reflectance |
topic_facet |
geo envir |
description |
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. |
format |
Article in Journal/Newspaper |
author |
T. Manninen K. Anttila E. Jääskeläinen A. Riihelä J. Peltoniemi P. Räisänen P. Lahtinen N. Siljamo L. Thölix O. Meinander A. Kontu H. Suokanerva R. Pirazzini J. Suomalainen T. Hakala S. Kaasalainen H. Kaartinen A. Kukko O. Hautecoeur J.-L. Roujean |
author_facet |
T. Manninen K. Anttila E. Jääskeläinen A. Riihelä J. Peltoniemi P. Räisänen P. Lahtinen N. Siljamo L. Thölix O. Meinander A. Kontu H. Suokanerva R. Pirazzini J. Suomalainen T. Hakala S. Kaasalainen H. Kaartinen A. Kukko O. Hautecoeur J.-L. Roujean |
author_sort |
T. Manninen |
title |
Effect of small-scale snow surface roughness on snow albedo and reflectance |
title_short |
Effect of small-scale snow surface roughness on snow albedo and reflectance |
title_full |
Effect of small-scale snow surface roughness on snow albedo and reflectance |
title_fullStr |
Effect of small-scale snow surface roughness on snow albedo and reflectance |
title_full_unstemmed |
Effect of small-scale snow surface roughness on snow albedo and reflectance |
title_sort |
effect of small-scale snow surface roughness on snow albedo and reflectance |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/tc-15-793-2021 https://tc.copernicus.org/articles/15/793/2021/tc-15-793-2021.pdf https://doaj.org/article/773767398c2a4896a43eed6edbaa3dac |
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The Cryosphere |
genre_facet |
The Cryosphere |
op_source |
The Cryosphere, Vol 15, Pp 793-820 (2021) |
op_relation |
doi:10.5194/tc-15-793-2021 1994-0416 1994-0424 https://tc.copernicus.org/articles/15/793/2021/tc-15-793-2021.pdf https://doaj.org/article/773767398c2a4896a43eed6edbaa3dac |
op_rights |
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op_doi |
https://doi.org/10.5194/tc-15-793-2021 |
container_title |
The Cryosphere |
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15 |
container_issue |
2 |
container_start_page |
793 |
op_container_end_page |
820 |
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