Modeling L-Band Brightness Temperature at Dome C in Antarctica and Comparison With SMOS Observations
International audience Two electromagnetic models were used to simulate snow emission at L-band from in situ measurements of snow properties collected at Dome C in Antarctica. Two different approaches were used: one based on the radiative transfer theory, and the other on the wave approach. The Soil...
Published in: | IEEE Transactions on Geoscience and Remote Sensing |
---|---|
Main Authors: | , , , , , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2015
|
Subjects: | |
Online Access: | https://hal.science/hal-03710814 https://hal.science/hal-03710814/document https://hal.science/hal-03710814/file/leduc_main.pdf https://doi.org/10.1109/TGRS.2015.2388790 |
id |
ftutoulouse3hal:oai:HAL:hal-03710814v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Université Toulouse III - Paul Sabatier: HAL-UPS |
op_collection_id |
ftutoulouse3hal |
language |
English |
topic |
Index Terms-Microwave Radiative transfer theory Remote sensing Snow Wave theory [SDE]Environmental Sciences |
spellingShingle |
Index Terms-Microwave Radiative transfer theory Remote sensing Snow Wave theory [SDE]Environmental Sciences Leduc-Leballeur, Marion Picard, Ghislain Mialon, Arnaud Arnaud, Laurent Lefebvre, Eric Possenti, Philippe Kerr, Yann Modeling L-Band Brightness Temperature at Dome C in Antarctica and Comparison With SMOS Observations |
topic_facet |
Index Terms-Microwave Radiative transfer theory Remote sensing Snow Wave theory [SDE]Environmental Sciences |
description |
International audience Two electromagnetic models were used to simulate snow emission at L-band from in situ measurements of snow properties collected at Dome C in Antarctica. Two different approaches were used: one based on the radiative transfer theory, and the other on the wave approach. The Soil Moisture Ocean Salinity (SMOS) satellite observations performed at 1.4 GHz (21 cm) were used to check the validity of these models. Model results based on the wave approach were in good agreement with SMOS observations, particularly for incidence angles lower than 55 o. Comparisons suggest that the wave approach is more suitable to simulate brightness temperature at L-band than the transfer radiative theory, because interference between the layers of the snowpack is better taken into account. The model based on the wave approach was then used to investigate several L-band characteristics at Dome C. The emission e-folding depth, i.e. 67% of the signal, was estimated at 250 m, and 99% of signal emanated from the top 900 m. Lband brightness temperature is only slightly affected by seasonal variations in surface temperature, confirming the high temporal stability of snow emission at low frequency. Sensitivity tests showed that a good knowledge of density variability in snowpack is essential for accurate simulations in L-band. |
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) Centre d'études spatiales de la biosphère (CESBIO) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Centre National d'Études Spatiales Toulouse (CNES) |
format |
Article in Journal/Newspaper |
author |
Leduc-Leballeur, Marion Picard, Ghislain Mialon, Arnaud Arnaud, Laurent Lefebvre, Eric Possenti, Philippe Kerr, Yann |
author_facet |
Leduc-Leballeur, Marion Picard, Ghislain Mialon, Arnaud Arnaud, Laurent Lefebvre, Eric Possenti, Philippe Kerr, Yann |
author_sort |
Leduc-Leballeur, Marion |
title |
Modeling L-Band Brightness Temperature at Dome C in Antarctica and Comparison With SMOS Observations |
title_short |
Modeling L-Band Brightness Temperature at Dome C in Antarctica and Comparison With SMOS Observations |
title_full |
Modeling L-Band Brightness Temperature at Dome C in Antarctica and Comparison With SMOS Observations |
title_fullStr |
Modeling L-Band Brightness Temperature at Dome C in Antarctica and Comparison With SMOS Observations |
title_full_unstemmed |
Modeling L-Band Brightness Temperature at Dome C in Antarctica and Comparison With SMOS Observations |
title_sort |
modeling l-band brightness temperature at dome c in antarctica and comparison with smos observations |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.science/hal-03710814 https://hal.science/hal-03710814/document https://hal.science/hal-03710814/file/leduc_main.pdf https://doi.org/10.1109/TGRS.2015.2388790 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
ISSN: 0196-2892 IEEE Transactions on Geoscience and Remote Sensing https://hal.science/hal-03710814 IEEE Transactions on Geoscience and Remote Sensing, 2015, 53 (7), pp.4022-4032. ⟨10.1109/TGRS.2015.2388790⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1109/TGRS.2015.2388790 hal-03710814 https://hal.science/hal-03710814 https://hal.science/hal-03710814/document https://hal.science/hal-03710814/file/leduc_main.pdf doi:10.1109/TGRS.2015.2388790 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1109/TGRS.2015.2388790 |
container_title |
IEEE Transactions on Geoscience and Remote Sensing |
container_volume |
53 |
container_issue |
7 |
container_start_page |
4022 |
op_container_end_page |
4032 |
_version_ |
1802651765086093312 |
spelling |
ftutoulouse3hal:oai:HAL:hal-03710814v1 2024-06-23T07:47:38+00:00 Modeling L-Band Brightness Temperature at Dome C in Antarctica and Comparison With SMOS Observations Leduc-Leballeur, Marion Picard, Ghislain Mialon, Arnaud Arnaud, Laurent Lefebvre, Eric Possenti, Philippe Kerr, Yann 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) Centre d'études spatiales de la biosphère (CESBIO) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Centre National d'Études Spatiales Toulouse (CNES) 2015-07 https://hal.science/hal-03710814 https://hal.science/hal-03710814/document https://hal.science/hal-03710814/file/leduc_main.pdf https://doi.org/10.1109/TGRS.2015.2388790 en eng HAL CCSD Institute of Electrical and Electronics Engineers info:eu-repo/semantics/altIdentifier/doi/10.1109/TGRS.2015.2388790 hal-03710814 https://hal.science/hal-03710814 https://hal.science/hal-03710814/document https://hal.science/hal-03710814/file/leduc_main.pdf doi:10.1109/TGRS.2015.2388790 info:eu-repo/semantics/OpenAccess ISSN: 0196-2892 IEEE Transactions on Geoscience and Remote Sensing https://hal.science/hal-03710814 IEEE Transactions on Geoscience and Remote Sensing, 2015, 53 (7), pp.4022-4032. ⟨10.1109/TGRS.2015.2388790⟩ Index Terms-Microwave Radiative transfer theory Remote sensing Snow Wave theory [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2015 ftutoulouse3hal https://doi.org/10.1109/TGRS.2015.2388790 2024-06-10T23:56:35Z International audience Two electromagnetic models were used to simulate snow emission at L-band from in situ measurements of snow properties collected at Dome C in Antarctica. Two different approaches were used: one based on the radiative transfer theory, and the other on the wave approach. The Soil Moisture Ocean Salinity (SMOS) satellite observations performed at 1.4 GHz (21 cm) were used to check the validity of these models. Model results based on the wave approach were in good agreement with SMOS observations, particularly for incidence angles lower than 55 o. Comparisons suggest that the wave approach is more suitable to simulate brightness temperature at L-band than the transfer radiative theory, because interference between the layers of the snowpack is better taken into account. The model based on the wave approach was then used to investigate several L-band characteristics at Dome C. The emission e-folding depth, i.e. 67% of the signal, was estimated at 250 m, and 99% of signal emanated from the top 900 m. Lband brightness temperature is only slightly affected by seasonal variations in surface temperature, confirming the high temporal stability of snow emission at low frequency. Sensitivity tests showed that a good knowledge of density variability in snowpack is essential for accurate simulations in L-band. Article in Journal/Newspaper Antarc* Antarctica Université Toulouse III - Paul Sabatier: HAL-UPS IEEE Transactions on Geoscience and Remote Sensing 53 7 4022 4032 |