Dynamics of the snow grain size in a windy coastal area of Antarctica from continuous in situ spectral-albedo measurements
International audience Abstract. The grain size of the superficial snow layer is a key determinant of the surface albedo in Antarctica. Its evolution is the result of multiple interacting processes, such as dry and wet metamorphism, melt, snow drift, and precipitation. Among them, snow drift has the...
Published in: | The Cryosphere |
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Online Access: | https://hal.science/hal-04389360 https://hal.science/hal-04389360/document https://hal.science/hal-04389360/file/arioli_2023_multiband.pdf https://doi.org/10.5194/tc-17-2323-2023 |
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ftunigrenoble:oai:HAL:hal-04389360v1 2024-06-23T07:47:24+00:00 Dynamics of the snow grain size in a windy coastal area of Antarctica from continuous in situ spectral-albedo measurements Arioli, Sara Picard, Ghislain Arnaud, Laurent Favier, Vincent Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) Université Joseph Fourier - Grenoble 1 (UJF) University of Sheffield Sheffield Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT) 2023-06-08 https://hal.science/hal-04389360 https://hal.science/hal-04389360/document https://hal.science/hal-04389360/file/arioli_2023_multiband.pdf https://doi.org/10.5194/tc-17-2323-2023 en eng HAL CCSD Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-17-2323-2023 hal-04389360 https://hal.science/hal-04389360 https://hal.science/hal-04389360/document https://hal.science/hal-04389360/file/arioli_2023_multiband.pdf doi:10.5194/tc-17-2323-2023 WOS: 001004348800001 info:eu-repo/semantics/OpenAccess ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal.science/hal-04389360 The Cryosphere, 2023, 17 (6), pp.2323-2342. ⟨10.5194/tc-17-2323-2023⟩ [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2023 ftunigrenoble https://doi.org/10.5194/tc-17-2323-2023 2024-06-04T00:01:42Z International audience Abstract. The grain size of the superficial snow layer is a key determinant of the surface albedo in Antarctica. Its evolution is the result of multiple interacting processes, such as dry and wet metamorphism, melt, snow drift, and precipitation. Among them, snow drift has the least known and least predictable impact. The goal of this study is to relate the variations in surface snow grain size to these processes in a windy location of the Antarctic coast. For this, we retrieved the daily grain size from 5-year-long in situ observations of the spectral albedo recorded by a new multi-band albedometer, unique in terms of autonomy and described here for the first time. An uncertainty assessment and a comparison with satellite-retrieved grain size were carried out to verify the reliability of the instrument, and an RMSE up to 0.16 mm in the observed grain size was found. By relating these in situ measurements to time series of snow drift, surface temperature, snow surface height and snowfall, we established that the evolution of the grain size in the presence of snow drift is complex and follows two possible pathways: (1) a decrease in the grain size (about half of our measurements) resulting from the deposition of small grains advected by the wind (surprisingly, this decrease is often – 2/3 of the cases– associated with a decrease in the surface height, i.e., a net erosion over the drift episode), (2) an increase in the grain size (the other half) due to either the removal of the surface layer or metamorphism. However, we note that this increase is often limited with respect to the increase predicted by a theoretical metamorphism model, suggesting that a concomitant deposition of small grains is likely. At last, we found that wind also completely impedes the deposition of snowfall during half of the observed precipitation events. When this happens, the grain size evolves as if precipitation were not occurring. As a result of all these processes, we conclude that the grain size in a windy ... Article in Journal/Newspaper Antarc* Antarctic Antarctica The Cryosphere Université Grenoble Alpes: HAL Antarctic The Antarctic The Cryosphere 17 6 2323 2342 |
institution |
Open Polar |
collection |
Université Grenoble Alpes: HAL |
op_collection_id |
ftunigrenoble |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Arioli, Sara Picard, Ghislain Arnaud, Laurent Favier, Vincent Dynamics of the snow grain size in a windy coastal area of Antarctica from continuous in situ spectral-albedo measurements |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience Abstract. The grain size of the superficial snow layer is a key determinant of the surface albedo in Antarctica. Its evolution is the result of multiple interacting processes, such as dry and wet metamorphism, melt, snow drift, and precipitation. Among them, snow drift has the least known and least predictable impact. The goal of this study is to relate the variations in surface snow grain size to these processes in a windy location of the Antarctic coast. For this, we retrieved the daily grain size from 5-year-long in situ observations of the spectral albedo recorded by a new multi-band albedometer, unique in terms of autonomy and described here for the first time. An uncertainty assessment and a comparison with satellite-retrieved grain size were carried out to verify the reliability of the instrument, and an RMSE up to 0.16 mm in the observed grain size was found. By relating these in situ measurements to time series of snow drift, surface temperature, snow surface height and snowfall, we established that the evolution of the grain size in the presence of snow drift is complex and follows two possible pathways: (1) a decrease in the grain size (about half of our measurements) resulting from the deposition of small grains advected by the wind (surprisingly, this decrease is often – 2/3 of the cases– associated with a decrease in the surface height, i.e., a net erosion over the drift episode), (2) an increase in the grain size (the other half) due to either the removal of the surface layer or metamorphism. However, we note that this increase is often limited with respect to the increase predicted by a theoretical metamorphism model, suggesting that a concomitant deposition of small grains is likely. At last, we found that wind also completely impedes the deposition of snowfall during half of the observed precipitation events. When this happens, the grain size evolves as if precipitation were not occurring. As a result of all these processes, we conclude that the grain size in a windy ... |
author2 |
Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) Université Joseph Fourier - Grenoble 1 (UJF) University of Sheffield Sheffield Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT) |
format |
Article in Journal/Newspaper |
author |
Arioli, Sara Picard, Ghislain Arnaud, Laurent Favier, Vincent |
author_facet |
Arioli, Sara Picard, Ghislain Arnaud, Laurent Favier, Vincent |
author_sort |
Arioli, Sara |
title |
Dynamics of the snow grain size in a windy coastal area of Antarctica from continuous in situ spectral-albedo measurements |
title_short |
Dynamics of the snow grain size in a windy coastal area of Antarctica from continuous in situ spectral-albedo measurements |
title_full |
Dynamics of the snow grain size in a windy coastal area of Antarctica from continuous in situ spectral-albedo measurements |
title_fullStr |
Dynamics of the snow grain size in a windy coastal area of Antarctica from continuous in situ spectral-albedo measurements |
title_full_unstemmed |
Dynamics of the snow grain size in a windy coastal area of Antarctica from continuous in situ spectral-albedo measurements |
title_sort |
dynamics of the snow grain size in a windy coastal area of antarctica from continuous in situ spectral-albedo measurements |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://hal.science/hal-04389360 https://hal.science/hal-04389360/document https://hal.science/hal-04389360/file/arioli_2023_multiband.pdf https://doi.org/10.5194/tc-17-2323-2023 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica The Cryosphere |
genre_facet |
Antarc* Antarctic Antarctica The Cryosphere |
op_source |
ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal.science/hal-04389360 The Cryosphere, 2023, 17 (6), pp.2323-2342. ⟨10.5194/tc-17-2323-2023⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-17-2323-2023 hal-04389360 https://hal.science/hal-04389360 https://hal.science/hal-04389360/document https://hal.science/hal-04389360/file/arioli_2023_multiband.pdf doi:10.5194/tc-17-2323-2023 WOS: 001004348800001 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/tc-17-2323-2023 |
container_title |
The Cryosphere |
container_volume |
17 |
container_issue |
6 |
container_start_page |
2323 |
op_container_end_page |
2342 |
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1802651503753691136 |