In situ continuous visible and near-infrared spectroscopy of an alpine snowpack
Snow spectral albedo in the visible/near-infrared range has been continuously measured during a winter season at Col de Porte alpine site (French Alps; 45.30° N, 5.77° E; 1325 m a.s.l.). The evolution of such alpine snowpack is complex due to intensive precipitation, rapid melt events and Saharan du...
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Copernicus Publications
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00010257 2023-05-15T18:32:32+02:00 In situ continuous visible and near-infrared spectroscopy of an alpine snowpack Dumont, Marie Arnaud, Laurent Picard, Ghislain Libois, Quentin Lejeune, Yves Nabat, Pierre Voisin, Didier Morin, Samuel 2017-05 electronic https://doi.org/10.5194/tc-11-1091-2017 https://noa.gwlb.de/receive/cop_mods_00010257 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00010214/tc-11-1091-2017.pdf https://tc.copernicus.org/articles/11/1091/2017/tc-11-1091-2017.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-11-1091-2017 https://noa.gwlb.de/receive/cop_mods_00010257 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00010214/tc-11-1091-2017.pdf https://tc.copernicus.org/articles/11/1091/2017/tc-11-1091-2017.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2017 ftnonlinearchiv https://doi.org/10.5194/tc-11-1091-2017 2022-02-08T22:57:09Z Snow spectral albedo in the visible/near-infrared range has been continuously measured during a winter season at Col de Porte alpine site (French Alps; 45.30° N, 5.77° E; 1325 m a.s.l.). The evolution of such alpine snowpack is complex due to intensive precipitation, rapid melt events and Saharan dust deposition outbreaks. This study highlights that the resulting intricate variations of spectral albedo can be successfully explained by variations of the following snow surface variables: specific surface area (SSA) of snow, effective light-absorbing impurities content, presence of liquid water and slope. The methodology developed in this study disentangles the effect of these variables on snow spectral albedo. The presence of liquid water at the snow surface results in a spectral shift of the albedo from which melt events can be identified with an occurrence of false detection rate lower than 3.5 %. Snow SSA mostly impacts spectral albedo in the near-infrared range. Impurity deposition mostly impacts the albedo in the visible range but this impact is very dependent on snow SSA and surface slope. Our work thus demonstrates that the SSA estimation from spectral albedo is affected by large uncertainties for a tilted snow surface and medium to high impurity contents and that the estimation of impurity content is also affected by large uncertainties, especially for low values below 50 ng g−1 black carbon equivalent. The proposed methodology opens routes for retrieval of SSA, impurity content, melt events and surface slope from spectral albedo. However, an exhaustive accuracy assessment of the snow black properties retrieval would require more independent in situ measurements and is beyond the scope of the present study. This time series of snow spectral albedo nevertheless already provides a new insight into our understanding of the evolution of snow surface properties. Article in Journal/Newspaper The Cryosphere Niedersächsisches Online-Archiv NOA The Cryosphere 11 3 1091 1110 |
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English |
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article Verlagsveröffentlichung Dumont, Marie Arnaud, Laurent Picard, Ghislain Libois, Quentin Lejeune, Yves Nabat, Pierre Voisin, Didier Morin, Samuel In situ continuous visible and near-infrared spectroscopy of an alpine snowpack |
topic_facet |
article Verlagsveröffentlichung |
description |
Snow spectral albedo in the visible/near-infrared range has been continuously measured during a winter season at Col de Porte alpine site (French Alps; 45.30° N, 5.77° E; 1325 m a.s.l.). The evolution of such alpine snowpack is complex due to intensive precipitation, rapid melt events and Saharan dust deposition outbreaks. This study highlights that the resulting intricate variations of spectral albedo can be successfully explained by variations of the following snow surface variables: specific surface area (SSA) of snow, effective light-absorbing impurities content, presence of liquid water and slope. The methodology developed in this study disentangles the effect of these variables on snow spectral albedo. The presence of liquid water at the snow surface results in a spectral shift of the albedo from which melt events can be identified with an occurrence of false detection rate lower than 3.5 %. Snow SSA mostly impacts spectral albedo in the near-infrared range. Impurity deposition mostly impacts the albedo in the visible range but this impact is very dependent on snow SSA and surface slope. Our work thus demonstrates that the SSA estimation from spectral albedo is affected by large uncertainties for a tilted snow surface and medium to high impurity contents and that the estimation of impurity content is also affected by large uncertainties, especially for low values below 50 ng g−1 black carbon equivalent. The proposed methodology opens routes for retrieval of SSA, impurity content, melt events and surface slope from spectral albedo. However, an exhaustive accuracy assessment of the snow black properties retrieval would require more independent in situ measurements and is beyond the scope of the present study. This time series of snow spectral albedo nevertheless already provides a new insight into our understanding of the evolution of snow surface properties. |
format |
Article in Journal/Newspaper |
author |
Dumont, Marie Arnaud, Laurent Picard, Ghislain Libois, Quentin Lejeune, Yves Nabat, Pierre Voisin, Didier Morin, Samuel |
author_facet |
Dumont, Marie Arnaud, Laurent Picard, Ghislain Libois, Quentin Lejeune, Yves Nabat, Pierre Voisin, Didier Morin, Samuel |
author_sort |
Dumont, Marie |
title |
In situ continuous visible and near-infrared spectroscopy of an alpine snowpack |
title_short |
In situ continuous visible and near-infrared spectroscopy of an alpine snowpack |
title_full |
In situ continuous visible and near-infrared spectroscopy of an alpine snowpack |
title_fullStr |
In situ continuous visible and near-infrared spectroscopy of an alpine snowpack |
title_full_unstemmed |
In situ continuous visible and near-infrared spectroscopy of an alpine snowpack |
title_sort |
in situ continuous visible and near-infrared spectroscopy of an alpine snowpack |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/tc-11-1091-2017 https://noa.gwlb.de/receive/cop_mods_00010257 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00010214/tc-11-1091-2017.pdf https://tc.copernicus.org/articles/11/1091/2017/tc-11-1091-2017.pdf |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-11-1091-2017 https://noa.gwlb.de/receive/cop_mods_00010257 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00010214/tc-11-1091-2017.pdf https://tc.copernicus.org/articles/11/1091/2017/tc-11-1091-2017.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-11-1091-2017 |
container_title |
The Cryosphere |
container_volume |
11 |
container_issue |
3 |
container_start_page |
1091 |
op_container_end_page |
1110 |
_version_ |
1766216650599694336 |