Effect of small-scale snow surface roughness on snow albedo and reflectance
<p>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 Sn...
| Main Authors: | , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2021-02-01
|
| Series: | The Cryosphere |
| Online Access: | https://tc.copernicus.org/articles/15/793/2021/tc-15-793-2021.pdf |
| _version_ | 1819054150915194880 |
|---|---|
| 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 H. Kaartinen A. Kukko A. Kukko O. Hautecoeur 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 H. Kaartinen A. Kukko A. Kukko O. Hautecoeur O. Hautecoeur J.-L. Roujean |
| author_sort | T. Manninen |
| collection | DOAJ |
| description | <p>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.</p> |
| first_indexed | 2024-12-21T12:47:03Z |
| format | Article |
| id | doaj.art-773767398c2a4896a43eed6edbaa3dac |
| institution | Directory Open Access Journal |
| issn | 1994-0416 1994-0424 |
| language | English |
| last_indexed | 2024-12-21T12:47:03Z |
| publishDate | 2021-02-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | The Cryosphere |
| spelling | doaj.art-773767398c2a4896a43eed6edbaa3dac2022-12-21T19:03:36ZengCopernicus PublicationsThe Cryosphere1994-04161994-04242021-02-011579382010.5194/tc-15-793-2021Effect of small-scale snow surface roughness on snow albedo and reflectanceT. Manninen0K. Anttila1E. Jääskeläinen2A. Riihelä3J. Peltoniemi4P. Räisänen5P. Lahtinen6N. Siljamo7L. Thölix8O. Meinander9A. Kontu10H. Suokanerva11R. Pirazzini12J. Suomalainen13T. Hakala14S. Kaasalainen15H. Kaartinen16H. Kaartinen17A. Kukko18A. Kukko19O. Hautecoeur20O. Hautecoeur21J.-L. Roujean22Finnish Meteorological Institute, Helsinki, P.O. Box 503, 00101, Finland Finnish Meteorological Institute, Helsinki, P.O. Box 503, 00101, Finland Finnish Meteorological Institute, Helsinki, P.O. Box 503, 00101, Finland Finnish Meteorological Institute, Helsinki, P.O. Box 503, 00101, Finland Finnish Geospatial Research Institute, National Land Survey, Geodeetinrinne 2, 02430 Masala, FinlandFinnish Meteorological Institute, Helsinki, P.O. Box 503, 00101, Finland Finnish Meteorological Institute, Helsinki, P.O. Box 503, 00101, Finland Finnish Meteorological Institute, Helsinki, P.O. Box 503, 00101, Finland Finnish Meteorological Institute, Helsinki, P.O. Box 503, 00101, Finland Finnish Meteorological Institute, Helsinki, P.O. Box 503, 00101, Finland Finnish Meteorological Institute, Helsinki, P.O. Box 503, 00101, Finland Finnish Meteorological Institute, Helsinki, P.O. Box 503, 00101, Finland Finnish Meteorological Institute, Helsinki, P.O. Box 503, 00101, Finland Finnish Geospatial Research Institute, National Land Survey, Geodeetinrinne 2, 02430 Masala, FinlandFinnish Geospatial Research Institute, National Land Survey, Geodeetinrinne 2, 02430 Masala, FinlandFinnish Geospatial Research Institute, National Land Survey, Geodeetinrinne 2, 02430 Masala, FinlandFinnish Geospatial Research Institute, National Land Survey, Geodeetinrinne 2, 02430 Masala, FinlandDepartment of Geography and Geology, University of Turku, 20500 Turku, FinlandFinnish Geospatial Research Institute, National Land Survey, Geodeetinrinne 2, 02430 Masala, FinlandDepartment of Built Environment, Aalto University, 02150 Espoo, FinlandMétéo-France, Toulouse, Francecurrently at: Exostaff GmbH/EUMETSAT, Darmstadt, GermanyCentre d'Etudes Spatiales de la BIOsphère (CESBIO) – UMR 5126 – 31401 Toulouse, France<p>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.</p>https://tc.copernicus.org/articles/15/793/2021/tc-15-793-2021.pdf |
| spellingShingle | 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 H. Kaartinen A. Kukko A. Kukko O. Hautecoeur O. Hautecoeur J.-L. Roujean Effect of small-scale snow surface roughness on snow albedo and reflectance The Cryosphere |
| title | 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_short | 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 |
| url | https://tc.copernicus.org/articles/15/793/2021/tc-15-793-2021.pdf |
| work_keys_str_mv | AT tmanninen effectofsmallscalesnowsurfaceroughnessonsnowalbedoandreflectance AT kanttila effectofsmallscalesnowsurfaceroughnessonsnowalbedoandreflectance AT ejaaskelainen effectofsmallscalesnowsurfaceroughnessonsnowalbedoandreflectance AT ariihela effectofsmallscalesnowsurfaceroughnessonsnowalbedoandreflectance AT jpeltoniemi effectofsmallscalesnowsurfaceroughnessonsnowalbedoandreflectance AT praisanen effectofsmallscalesnowsurfaceroughnessonsnowalbedoandreflectance AT plahtinen effectofsmallscalesnowsurfaceroughnessonsnowalbedoandreflectance AT nsiljamo effectofsmallscalesnowsurfaceroughnessonsnowalbedoandreflectance AT ltholix effectofsmallscalesnowsurfaceroughnessonsnowalbedoandreflectance AT omeinander effectofsmallscalesnowsurfaceroughnessonsnowalbedoandreflectance AT akontu effectofsmallscalesnowsurfaceroughnessonsnowalbedoandreflectance AT hsuokanerva effectofsmallscalesnowsurfaceroughnessonsnowalbedoandreflectance AT rpirazzini effectofsmallscalesnowsurfaceroughnessonsnowalbedoandreflectance AT jsuomalainen effectofsmallscalesnowsurfaceroughnessonsnowalbedoandreflectance AT thakala effectofsmallscalesnowsurfaceroughnessonsnowalbedoandreflectance AT skaasalainen effectofsmallscalesnowsurfaceroughnessonsnowalbedoandreflectance AT hkaartinen effectofsmallscalesnowsurfaceroughnessonsnowalbedoandreflectance AT hkaartinen effectofsmallscalesnowsurfaceroughnessonsnowalbedoandreflectance AT akukko effectofsmallscalesnowsurfaceroughnessonsnowalbedoandreflectance AT akukko effectofsmallscalesnowsurfaceroughnessonsnowalbedoandreflectance AT ohautecoeur effectofsmallscalesnowsurfaceroughnessonsnowalbedoandreflectance AT ohautecoeur effectofsmallscalesnowsurfaceroughnessonsnowalbedoandreflectance AT jlroujean effectofsmallscalesnowsurfaceroughnessonsnowalbedoandreflectance |