Radar altimeter waveform simulations in Antarctica with the Snow Microwave Radiative Transfer Model (SMRT)
International audience Radar altimeters are important tools to monitor the volume of the ice sheets. The penetration of radar waves in the snowpack is a major source of uncertainty to retrieve surface elevation. To correct this effect, a better understanding of the sensitivity of the radar waveforms...
Published in: | Remote Sensing of Environment |
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Online Access: | https://hal.science/hal-03402150 https://hal.science/hal-03402150/document https://hal.science/hal-03402150/file/altimetry_RSE_Fanny_Larue_11042021.pdf https://doi.org/10.1016/j.rse.2021.112534 |
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ftunivnantes:oai:HAL:hal-03402150v1 2023-05-15T13:45:08+02:00 Radar altimeter waveform simulations in Antarctica with the Snow Microwave Radiative Transfer Model (SMRT) Larue, Fanny Picard, Ghislain Aublanc, Jérémie Arnaud, Laurent Robledano-Perez, Alvaro Le Meur, Emmanuel Favier, Vincent Jourdain, Bruno Savarino, Joel Thibaut, Pierre 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)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) Collecte Localisation Satellites (CLS) 2021-09 https://hal.science/hal-03402150 https://hal.science/hal-03402150/document https://hal.science/hal-03402150/file/altimetry_RSE_Fanny_Larue_11042021.pdf https://doi.org/10.1016/j.rse.2021.112534 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.1016/j.rse.2021.112534 hal-03402150 https://hal.science/hal-03402150 https://hal.science/hal-03402150/document https://hal.science/hal-03402150/file/altimetry_RSE_Fanny_Larue_11042021.pdf doi:10.1016/j.rse.2021.112534 info:eu-repo/semantics/OpenAccess ISSN: 0034-4257 EISSN: 0034-4257 Remote Sensing of Environment https://hal.science/hal-03402150 Remote Sensing of Environment, 2021, 263, pp.112534. ⟨10.1016/j.rse.2021.112534⟩ Antarctic ice sheet SMRT remote sensing radar altimetry waveform modeling field measurements [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2021 ftunivnantes https://doi.org/10.1016/j.rse.2021.112534 2023-03-01T02:10:38Z International audience Radar altimeters are important tools to monitor the volume of the ice sheets. The penetration of radar waves in the snowpack is a major source of uncertainty to retrieve surface elevation. To correct this effect, a better understanding of the sensitivity of the radar waveforms to snow properties is needed. Here, we present an extension of the Snow Model Radiative Transfer (SMRT) to compute radar waveforms and conduct a series of simulations on the Antarctic ice sheet. SMRT is driven by snow and surface roughness properties measured over a large latitudinal range during two field campaigns on the Antarctic Plateau. These measurements show that the snowpack is rougher, denser, less stratified, warmer, and has smaller snow grains near the coast than on the central Plateau. These simulations are compared to satellite observations in the Ka, Ku, and S bands. SMRT reproduces the observed waveforms well. For all sites and all sensors, the main contribution comes from the surface echo. The echo from snow grains (volume scattering) represents up to 40% of the amplitude of the total waveform power in the Ka band, and less at the lower frequencies. The highest amplitude is observed on the central Plateau due to the combination Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Université de Nantes: HAL-UNIV-NANTES Antarctic The Antarctic Remote Sensing of Environment 263 112534 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Antarctic ice sheet SMRT remote sensing radar altimetry waveform modeling field measurements [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
Antarctic ice sheet SMRT remote sensing radar altimetry waveform modeling field measurements [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Larue, Fanny Picard, Ghislain Aublanc, Jérémie Arnaud, Laurent Robledano-Perez, Alvaro Le Meur, Emmanuel Favier, Vincent Jourdain, Bruno Savarino, Joel Thibaut, Pierre Radar altimeter waveform simulations in Antarctica with the Snow Microwave Radiative Transfer Model (SMRT) |
topic_facet |
Antarctic ice sheet SMRT remote sensing radar altimetry waveform modeling field measurements [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Radar altimeters are important tools to monitor the volume of the ice sheets. The penetration of radar waves in the snowpack is a major source of uncertainty to retrieve surface elevation. To correct this effect, a better understanding of the sensitivity of the radar waveforms to snow properties is needed. Here, we present an extension of the Snow Model Radiative Transfer (SMRT) to compute radar waveforms and conduct a series of simulations on the Antarctic ice sheet. SMRT is driven by snow and surface roughness properties measured over a large latitudinal range during two field campaigns on the Antarctic Plateau. These measurements show that the snowpack is rougher, denser, less stratified, warmer, and has smaller snow grains near the coast than on the central Plateau. These simulations are compared to satellite observations in the Ka, Ku, and S bands. SMRT reproduces the observed waveforms well. For all sites and all sensors, the main contribution comes from the surface echo. The echo from snow grains (volume scattering) represents up to 40% of the amplitude of the total waveform power in the Ka band, and less at the lower frequencies. The highest amplitude is observed on the central Plateau due to the combination |
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)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) Collecte Localisation Satellites (CLS) |
format |
Article in Journal/Newspaper |
author |
Larue, Fanny Picard, Ghislain Aublanc, Jérémie Arnaud, Laurent Robledano-Perez, Alvaro Le Meur, Emmanuel Favier, Vincent Jourdain, Bruno Savarino, Joel Thibaut, Pierre |
author_facet |
Larue, Fanny Picard, Ghislain Aublanc, Jérémie Arnaud, Laurent Robledano-Perez, Alvaro Le Meur, Emmanuel Favier, Vincent Jourdain, Bruno Savarino, Joel Thibaut, Pierre |
author_sort |
Larue, Fanny |
title |
Radar altimeter waveform simulations in Antarctica with the Snow Microwave Radiative Transfer Model (SMRT) |
title_short |
Radar altimeter waveform simulations in Antarctica with the Snow Microwave Radiative Transfer Model (SMRT) |
title_full |
Radar altimeter waveform simulations in Antarctica with the Snow Microwave Radiative Transfer Model (SMRT) |
title_fullStr |
Radar altimeter waveform simulations in Antarctica with the Snow Microwave Radiative Transfer Model (SMRT) |
title_full_unstemmed |
Radar altimeter waveform simulations in Antarctica with the Snow Microwave Radiative Transfer Model (SMRT) |
title_sort |
radar altimeter waveform simulations in antarctica with the snow microwave radiative transfer model (smrt) |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.science/hal-03402150 https://hal.science/hal-03402150/document https://hal.science/hal-03402150/file/altimetry_RSE_Fanny_Larue_11042021.pdf https://doi.org/10.1016/j.rse.2021.112534 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet |
op_source |
ISSN: 0034-4257 EISSN: 0034-4257 Remote Sensing of Environment https://hal.science/hal-03402150 Remote Sensing of Environment, 2021, 263, pp.112534. ⟨10.1016/j.rse.2021.112534⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.rse.2021.112534 hal-03402150 https://hal.science/hal-03402150 https://hal.science/hal-03402150/document https://hal.science/hal-03402150/file/altimetry_RSE_Fanny_Larue_11042021.pdf doi:10.1016/j.rse.2021.112534 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.rse.2021.112534 |
container_title |
Remote Sensing of Environment |
container_volume |
263 |
container_start_page |
112534 |
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1766213612298305536 |