Evolution of snow physical properties on the Antarctic Plateau. Observing and modeling radiative transfer and snow metamorphism
The surface energy balance of the Antarctic Plateau is mainly governed by the physical properties of the snowpack in the topmost centimeters, whose evolution is driven by intricated processes such as: snow metamorphism, temperature profiles variations, solar radiation penetration, precipitation, sno...
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Other Authors: | , , , , |
Format: | Doctoral or Postdoctoral Thesis |
Language: | French |
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HAL CCSD
2014
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Online Access: | https://theses.hal.science/tel-01232294 https://theses.hal.science/tel-01232294/document https://theses.hal.science/tel-01232294/file/LIBOIS_2014_archivage.pdf |
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ftunivnantes:oai:HAL:tel-01232294v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
French |
topic |
Snow Antarctica Radiative transfer Specific surface area Density Metamorphism Neige Antarctique Transfert radiatif Surface spécifique Densité Métamorphisme [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
Snow Antarctica Radiative transfer Specific surface area Density Metamorphism Neige Antarctique Transfert radiatif Surface spécifique Densité Métamorphisme [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Libois, Quentin Evolution of snow physical properties on the Antarctic Plateau. Observing and modeling radiative transfer and snow metamorphism |
topic_facet |
Snow Antarctica Radiative transfer Specific surface area Density Metamorphism Neige Antarctique Transfert radiatif Surface spécifique Densité Métamorphisme [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
The surface energy balance of the Antarctic Plateau is mainly governed by the physical properties of the snowpack in the topmost centimeters, whose evolution is driven by intricated processes such as: snow metamorphism, temperature profiles variations, solar radiation penetration, precipitation, snow drift, etc. This thesis focuses on the interactions between all these components and aims at simulating the evolution of snow density and snow grain size (specific surface area) on the Antarctic Plateau. To physically model the absorption of solar radiation within the snowpack, a radiative transfer model with high spectral resolution (TARTES) is implemented in the detailed snowpack model Crocus. TARTES calculates the vertical profile of absorbed radiation in a layered snowpack whose characteristics are given. These characteristics include snow grain shape, a parameter that has been seldom studied. For this reason, an experimental method to estimate the optical grain shape is proposed and applied to a large number of snow samples. This method, which combines optical measurements, TARTES simulations and Bayesian inference, is used to estimate the optimal shape to be used in snow optical models. In addition, it highlights that representing snow as a collection of spherical particles results in overestimation of the penetration depth of solar radiation. The influence of the penetration of solar radiation on the snow temperature profiles is then investigated with analytical and numerical tools. The results point out the high sensitivity of the temperature profiles to surface snow physical properties. In particular, the density of the topmost centimeters of the snowpack is critical for the energy budget of the snowpack because it impacts both the effective thermal conductivity and the penetration depth of light. To simulate the evolution of snow physical properties at Dome C by taking into account their interdependence with snow optical properties, the model Crocus is used, driven by meteorological data. These simulations ... |
author2 |
Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Université de Grenoble Ghislain Picard |
format |
Doctoral or Postdoctoral Thesis |
author |
Libois, Quentin |
author_facet |
Libois, Quentin |
author_sort |
Libois, Quentin |
title |
Evolution of snow physical properties on the Antarctic Plateau. Observing and modeling radiative transfer and snow metamorphism |
title_short |
Evolution of snow physical properties on the Antarctic Plateau. Observing and modeling radiative transfer and snow metamorphism |
title_full |
Evolution of snow physical properties on the Antarctic Plateau. Observing and modeling radiative transfer and snow metamorphism |
title_fullStr |
Evolution of snow physical properties on the Antarctic Plateau. Observing and modeling radiative transfer and snow metamorphism |
title_full_unstemmed |
Evolution of snow physical properties on the Antarctic Plateau. Observing and modeling radiative transfer and snow metamorphism |
title_sort |
evolution of snow physical properties on the antarctic plateau. observing and modeling radiative transfer and snow metamorphism |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://theses.hal.science/tel-01232294 https://theses.hal.science/tel-01232294/document https://theses.hal.science/tel-01232294/file/LIBOIS_2014_archivage.pdf |
long_lat |
ENVELOPE(70.250,70.250,-49.350,-49.350) |
geographic |
Antarctic Le Plateau The Antarctic |
geographic_facet |
Antarctic Le Plateau The Antarctic |
genre |
Antarc* Antarctic Antarctica Antarctique* |
genre_facet |
Antarc* Antarctic Antarctica Antarctique* |
op_source |
https://theses.hal.science/tel-01232294 Océanographie. Université de Grenoble, 2014. Français. ⟨NNT : 2014GRENU026⟩ |
op_relation |
NNT: 2014GRENU026 tel-01232294 https://theses.hal.science/tel-01232294 https://theses.hal.science/tel-01232294/document https://theses.hal.science/tel-01232294/file/LIBOIS_2014_archivage.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766246831163965440 |
spelling |
ftunivnantes:oai:HAL:tel-01232294v1 2023-05-15T13:47:16+02:00 Evolution of snow physical properties on the Antarctic Plateau. Observing and modeling radiative transfer and snow metamorphism Evolution des propriétés physiques de neige de surface sur le plateau Antarctique. Observations et modélisation du transfert radiatif et du métamorphisme Libois, Quentin Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Université de Grenoble Ghislain Picard 2014-10-15 https://theses.hal.science/tel-01232294 https://theses.hal.science/tel-01232294/document https://theses.hal.science/tel-01232294/file/LIBOIS_2014_archivage.pdf fr fre HAL CCSD NNT: 2014GRENU026 tel-01232294 https://theses.hal.science/tel-01232294 https://theses.hal.science/tel-01232294/document https://theses.hal.science/tel-01232294/file/LIBOIS_2014_archivage.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-01232294 Océanographie. Université de Grenoble, 2014. Français. ⟨NNT : 2014GRENU026⟩ Snow Antarctica Radiative transfer Specific surface area Density Metamorphism Neige Antarctique Transfert radiatif Surface spécifique Densité Métamorphisme [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/doctoralThesis Theses 2014 ftunivnantes 2023-03-08T07:19:19Z The surface energy balance of the Antarctic Plateau is mainly governed by the physical properties of the snowpack in the topmost centimeters, whose evolution is driven by intricated processes such as: snow metamorphism, temperature profiles variations, solar radiation penetration, precipitation, snow drift, etc. This thesis focuses on the interactions between all these components and aims at simulating the evolution of snow density and snow grain size (specific surface area) on the Antarctic Plateau. To physically model the absorption of solar radiation within the snowpack, a radiative transfer model with high spectral resolution (TARTES) is implemented in the detailed snowpack model Crocus. TARTES calculates the vertical profile of absorbed radiation in a layered snowpack whose characteristics are given. These characteristics include snow grain shape, a parameter that has been seldom studied. For this reason, an experimental method to estimate the optical grain shape is proposed and applied to a large number of snow samples. This method, which combines optical measurements, TARTES simulations and Bayesian inference, is used to estimate the optimal shape to be used in snow optical models. In addition, it highlights that representing snow as a collection of spherical particles results in overestimation of the penetration depth of solar radiation. The influence of the penetration of solar radiation on the snow temperature profiles is then investigated with analytical and numerical tools. The results point out the high sensitivity of the temperature profiles to surface snow physical properties. In particular, the density of the topmost centimeters of the snowpack is critical for the energy budget of the snowpack because it impacts both the effective thermal conductivity and the penetration depth of light. To simulate the evolution of snow physical properties at Dome C by taking into account their interdependence with snow optical properties, the model Crocus is used, driven by meteorological data. These simulations ... Doctoral or Postdoctoral Thesis Antarc* Antarctic Antarctica Antarctique* Université de Nantes: HAL-UNIV-NANTES Antarctic Le Plateau ENVELOPE(70.250,70.250,-49.350,-49.350) The Antarctic |