Melt in Antarctica derived from Soil Moisture and Ocean Salinity (SMOS) observations at L band
International audience Melt occurrence in Antarctica is derived from L-band observations from the Soil Moisture and Ocean Salinity (SMOS) satellite between the austral summer 2010-2011 and 2017-2018. The detection algorithm is adapted from a threshold method previously developed for 19 GHz passive m...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2020
|
Subjects: | |
Online Access: | https://insu.hal.science/insu-03668289 https://insu.hal.science/insu-03668289/document https://insu.hal.science/insu-03668289/file/tc-14-539-2020.pdf https://doi.org/10.5194/tc-14-539-2020 |
id |
ftinsu:oai:HAL:insu-03668289v1 |
---|---|
record_format |
openpolar |
spelling |
ftinsu:oai:HAL:insu-03668289v1 2024-04-28T07:56:46+00:00 Melt in Antarctica derived from Soil Moisture and Ocean Salinity (SMOS) observations at L band Leduc-Leballeur, Marion Picard, Ghislain Macelloni, Giovanni Mialon, Arnaud Kerr, Yann H. 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) 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) 2020 https://insu.hal.science/insu-03668289 https://insu.hal.science/insu-03668289/document https://insu.hal.science/insu-03668289/file/tc-14-539-2020.pdf https://doi.org/10.5194/tc-14-539-2020 en eng HAL CCSD Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-14-539-2020 insu-03668289 https://insu.hal.science/insu-03668289 https://insu.hal.science/insu-03668289/document https://insu.hal.science/insu-03668289/file/tc-14-539-2020.pdf BIBCODE: 2020TCry.14.539L doi:10.5194/tc-14-539-2020 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://insu.hal.science/insu-03668289 The Cryosphere, 2020, 14, pp.539-548. ⟨10.5194/tc-14-539-2020⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2020 ftinsu https://doi.org/10.5194/tc-14-539-2020 2024-04-05T00:33:38Z International audience Melt occurrence in Antarctica is derived from L-band observations from the Soil Moisture and Ocean Salinity (SMOS) satellite between the austral summer 2010-2011 and 2017-2018. The detection algorithm is adapted from a threshold method previously developed for 19 GHz passive microwave measurements from the special sensor microwave imager (SSM/I) and special sensor microwave imager sounder (SSMIS). The comparison of daily melt occurrence retrieved from 1.4 and 19 GHz observations shows an overall close agreement, but a lag of few days is usually observed by SMOS at the beginning of the melt season. To understand the difference, a theoretical analysis is performed using a microwave emission radiative transfer model. It shows that the sensitivity of 1.4 GHz signal to liquid water is significantly weaker than at 19 GHz if the water is only present in the uppermost tens of centimetres of the snowpack. Conversely, 1.4 GHz measurements are sensitive to water when spread over at least 1 m and when present in depths up to hundreds of metres. This is explained by the large penetration depth in dry snow and by the long wavelength (21 cm). We conclude that SMOS and higher-frequency radiometers provide interesting complementary information on melt occurrence and on the location of the water in the snowpack. Article in Journal/Newspaper Antarc* Antarctica The Cryosphere Institut national des sciences de l'Univers: HAL-INSU The Cryosphere 14 2 539 548 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Leduc-Leballeur, Marion Picard, Ghislain Macelloni, Giovanni Mialon, Arnaud Kerr, Yann H. Melt in Antarctica derived from Soil Moisture and Ocean Salinity (SMOS) observations at L band |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience Melt occurrence in Antarctica is derived from L-band observations from the Soil Moisture and Ocean Salinity (SMOS) satellite between the austral summer 2010-2011 and 2017-2018. The detection algorithm is adapted from a threshold method previously developed for 19 GHz passive microwave measurements from the special sensor microwave imager (SSM/I) and special sensor microwave imager sounder (SSMIS). The comparison of daily melt occurrence retrieved from 1.4 and 19 GHz observations shows an overall close agreement, but a lag of few days is usually observed by SMOS at the beginning of the melt season. To understand the difference, a theoretical analysis is performed using a microwave emission radiative transfer model. It shows that the sensitivity of 1.4 GHz signal to liquid water is significantly weaker than at 19 GHz if the water is only present in the uppermost tens of centimetres of the snowpack. Conversely, 1.4 GHz measurements are sensitive to water when spread over at least 1 m and when present in depths up to hundreds of metres. This is explained by the large penetration depth in dry snow and by the long wavelength (21 cm). We conclude that SMOS and higher-frequency radiometers provide interesting complementary information on melt occurrence and on the location of the water in the snowpack. |
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) 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) |
format |
Article in Journal/Newspaper |
author |
Leduc-Leballeur, Marion Picard, Ghislain Macelloni, Giovanni Mialon, Arnaud Kerr, Yann H. |
author_facet |
Leduc-Leballeur, Marion Picard, Ghislain Macelloni, Giovanni Mialon, Arnaud Kerr, Yann H. |
author_sort |
Leduc-Leballeur, Marion |
title |
Melt in Antarctica derived from Soil Moisture and Ocean Salinity (SMOS) observations at L band |
title_short |
Melt in Antarctica derived from Soil Moisture and Ocean Salinity (SMOS) observations at L band |
title_full |
Melt in Antarctica derived from Soil Moisture and Ocean Salinity (SMOS) observations at L band |
title_fullStr |
Melt in Antarctica derived from Soil Moisture and Ocean Salinity (SMOS) observations at L band |
title_full_unstemmed |
Melt in Antarctica derived from Soil Moisture and Ocean Salinity (SMOS) observations at L band |
title_sort |
melt in antarctica derived from soil moisture and ocean salinity (smos) observations at l band |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://insu.hal.science/insu-03668289 https://insu.hal.science/insu-03668289/document https://insu.hal.science/insu-03668289/file/tc-14-539-2020.pdf https://doi.org/10.5194/tc-14-539-2020 |
genre |
Antarc* Antarctica The Cryosphere |
genre_facet |
Antarc* Antarctica The Cryosphere |
op_source |
ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://insu.hal.science/insu-03668289 The Cryosphere, 2020, 14, pp.539-548. ⟨10.5194/tc-14-539-2020⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-14-539-2020 insu-03668289 https://insu.hal.science/insu-03668289 https://insu.hal.science/insu-03668289/document https://insu.hal.science/insu-03668289/file/tc-14-539-2020.pdf BIBCODE: 2020TCry.14.539L doi:10.5194/tc-14-539-2020 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/tc-14-539-2020 |
container_title |
The Cryosphere |
container_volume |
14 |
container_issue |
2 |
container_start_page |
539 |
op_container_end_page |
548 |
_version_ |
1797584855162159104 |