Advances in altimetric snow depth estimates using bi-frequency SARAL and CryoSat-2 Ka-Ku measurements
International audience Although snow depth on sea ice is a key parameter for sea ice thickness (SIT) retrieval, there currently does not exist reliable estimations. In the Arctic, nearly all SIT products use a snow depth climatology (the modified Warren-99 climatology, W99m) constructed from in situ...
Published in: | The Cryosphere |
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Main Authors: | , , , , , , , , |
Other Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2021
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Online Access: | https://insu.hal.science/insu-03671315 https://insu.hal.science/insu-03671315/document https://insu.hal.science/insu-03671315/file/tc-15-5483-2021.pdf https://doi.org/10.5194/tc-15-5483-2021 |
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ftutoulouse3hal:oai:HAL:insu-03671315v1 |
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openpolar |
institution |
Open Polar |
collection |
Université Toulouse III - Paul Sabatier: HAL-UPS |
op_collection_id |
ftutoulouse3hal |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Garnier, Florent Fleury, Sara Garric, Gilles Bouffard, Jérôme Tsamados, Michel Laforge, Antoine Bocquet, Marion Mie Fredensborg Hansen, Renée Remy, Frédérique Advances in altimetric snow depth estimates using bi-frequency SARAL and CryoSat-2 Ka-Ku measurements |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience Although snow depth on sea ice is a key parameter for sea ice thickness (SIT) retrieval, there currently does not exist reliable estimations. In the Arctic, nearly all SIT products use a snow depth climatology (the modified Warren-99 climatology, W99m) constructed from in situ data obtained prior to the first significant impacts of climate change. In the Antarctic, the lack of information on snow depth remains a major obstacle in the development of reliable SIT products. In this study, we present the latest version of the altimetric snow depth (ASD) product computed over both hemispheres from the difference of the radar penetration into the snow pack between the Ka-band frequency SARAL/Altika and the Ku-band frequency CryoSat-2. The ASD solution is compared against a wide range of snow depth products including model data (Pan-Arctic Ice-Ocean Modelling and Assimilation System (PIOMAS) or its equivalent in the Antarctic the Global Ice-Ocean Modeling and Assimilation System (GIOMAS), the MERCATOR model, and NASA's Eulerian Snow On Sea Ice Model (NESOSIM, only in the Arctic)), the Advanced Microwave Scanning Radiometer-2 (AMSR2) passive radiometer data, and the Dual-altimeter Snow Thickness (DuST) Ka-Ku product (only in the Arctic). The ASD product is further validated in the Arctic against the ice mass balance (IMB) buoys, the CryoSat Validation Experiment (CryoVEx) and Operation Ice Bridge's (OIB) airborne measurements. These comparisons demonstrate that ASD is a relevant snow depth solution, with spatiotemporal patterns consistent with those of the alternative Ka-Ku DuST product but with a mean bias of about 6.5 cm. We also demonstrate that ASD is consistent with the validation data: comparisons with OIB's airborne snow radar in the Arctic during the period of 2014-2018 show a correlation of 0.66 and a RMSE of about 6 cm. Furthermore, a first-guess monthly climatology has been constructed in the Arctic from the ASD product, which shows a good agreement with OIB during 2009-2012. This ... |
author2 |
Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) 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 de Recherche pour le Développement (IRD)-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) |
format |
Article in Journal/Newspaper |
author |
Garnier, Florent Fleury, Sara Garric, Gilles Bouffard, Jérôme Tsamados, Michel Laforge, Antoine Bocquet, Marion Mie Fredensborg Hansen, Renée Remy, Frédérique |
author_facet |
Garnier, Florent Fleury, Sara Garric, Gilles Bouffard, Jérôme Tsamados, Michel Laforge, Antoine Bocquet, Marion Mie Fredensborg Hansen, Renée Remy, Frédérique |
author_sort |
Garnier, Florent |
title |
Advances in altimetric snow depth estimates using bi-frequency SARAL and CryoSat-2 Ka-Ku measurements |
title_short |
Advances in altimetric snow depth estimates using bi-frequency SARAL and CryoSat-2 Ka-Ku measurements |
title_full |
Advances in altimetric snow depth estimates using bi-frequency SARAL and CryoSat-2 Ka-Ku measurements |
title_fullStr |
Advances in altimetric snow depth estimates using bi-frequency SARAL and CryoSat-2 Ka-Ku measurements |
title_full_unstemmed |
Advances in altimetric snow depth estimates using bi-frequency SARAL and CryoSat-2 Ka-Ku measurements |
title_sort |
advances in altimetric snow depth estimates using bi-frequency saral and cryosat-2 ka-ku measurements |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://insu.hal.science/insu-03671315 https://insu.hal.science/insu-03671315/document https://insu.hal.science/insu-03671315/file/tc-15-5483-2021.pdf https://doi.org/10.5194/tc-15-5483-2021 |
geographic |
Antarctic Arctic The Antarctic |
geographic_facet |
Antarctic Arctic The Antarctic |
genre |
Antarc* Antarctic Arctic Climate change CryoSat Validation Experiment Sea ice The Cryosphere |
genre_facet |
Antarc* Antarctic Arctic Climate change CryoSat Validation Experiment Sea ice The Cryosphere |
op_source |
ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://insu.hal.science/insu-03671315 The Cryosphere, 2021, 15, pp.5483-5512. ⟨10.5194/tc-15-5483-2021⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-15-5483-2021 insu-03671315 https://insu.hal.science/insu-03671315 https://insu.hal.science/insu-03671315/document https://insu.hal.science/insu-03671315/file/tc-15-5483-2021.pdf BIBCODE: 2021TCry.15.5483G doi:10.5194/tc-15-5483-2021 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/tc-15-5483-2021 |
container_title |
The Cryosphere |
container_volume |
15 |
container_issue |
12 |
container_start_page |
5483 |
op_container_end_page |
5512 |
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1796299787375476736 |
spelling |
ftutoulouse3hal:oai:HAL:insu-03671315v1 2024-04-14T08:03:31+00:00 Advances in altimetric snow depth estimates using bi-frequency SARAL and CryoSat-2 Ka-Ku measurements Garnier, Florent Fleury, Sara Garric, Gilles Bouffard, Jérôme Tsamados, Michel Laforge, Antoine Bocquet, Marion Mie Fredensborg Hansen, Renée Remy, Frédérique Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) 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 de Recherche pour le Développement (IRD)-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) 2021 https://insu.hal.science/insu-03671315 https://insu.hal.science/insu-03671315/document https://insu.hal.science/insu-03671315/file/tc-15-5483-2021.pdf https://doi.org/10.5194/tc-15-5483-2021 en eng HAL CCSD Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-15-5483-2021 insu-03671315 https://insu.hal.science/insu-03671315 https://insu.hal.science/insu-03671315/document https://insu.hal.science/insu-03671315/file/tc-15-5483-2021.pdf BIBCODE: 2021TCry.15.5483G doi:10.5194/tc-15-5483-2021 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://insu.hal.science/insu-03671315 The Cryosphere, 2021, 15, pp.5483-5512. ⟨10.5194/tc-15-5483-2021⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2021 ftutoulouse3hal https://doi.org/10.5194/tc-15-5483-2021 2024-03-21T17:09:10Z International audience Although snow depth on sea ice is a key parameter for sea ice thickness (SIT) retrieval, there currently does not exist reliable estimations. In the Arctic, nearly all SIT products use a snow depth climatology (the modified Warren-99 climatology, W99m) constructed from in situ data obtained prior to the first significant impacts of climate change. In the Antarctic, the lack of information on snow depth remains a major obstacle in the development of reliable SIT products. In this study, we present the latest version of the altimetric snow depth (ASD) product computed over both hemispheres from the difference of the radar penetration into the snow pack between the Ka-band frequency SARAL/Altika and the Ku-band frequency CryoSat-2. The ASD solution is compared against a wide range of snow depth products including model data (Pan-Arctic Ice-Ocean Modelling and Assimilation System (PIOMAS) or its equivalent in the Antarctic the Global Ice-Ocean Modeling and Assimilation System (GIOMAS), the MERCATOR model, and NASA's Eulerian Snow On Sea Ice Model (NESOSIM, only in the Arctic)), the Advanced Microwave Scanning Radiometer-2 (AMSR2) passive radiometer data, and the Dual-altimeter Snow Thickness (DuST) Ka-Ku product (only in the Arctic). The ASD product is further validated in the Arctic against the ice mass balance (IMB) buoys, the CryoSat Validation Experiment (CryoVEx) and Operation Ice Bridge's (OIB) airborne measurements. These comparisons demonstrate that ASD is a relevant snow depth solution, with spatiotemporal patterns consistent with those of the alternative Ka-Ku DuST product but with a mean bias of about 6.5 cm. We also demonstrate that ASD is consistent with the validation data: comparisons with OIB's airborne snow radar in the Arctic during the period of 2014-2018 show a correlation of 0.66 and a RMSE of about 6 cm. Furthermore, a first-guess monthly climatology has been constructed in the Arctic from the ASD product, which shows a good agreement with OIB during 2009-2012. This ... Article in Journal/Newspaper Antarc* Antarctic Arctic Climate change CryoSat Validation Experiment Sea ice The Cryosphere Université Toulouse III - Paul Sabatier: HAL-UPS Antarctic Arctic The Antarctic The Cryosphere 15 12 5483 5512 |