Sea-Ice Detection From Near-Nadir Ku-Band Echoes From CFOSAT/SWIM Scatterometer
International audience SWIM on board CFOSAT is the first spaceborne, low incidence, rotating scatterometer, aiming at measuring in near-real time ocean waves spectra. With 5 off-nadir beams at incidences between 2 • and 10 • plus one nadir beam, it covers the Earth in 13 days, including polar region...
Published in: | Earth and Space Science |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2022
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Online Access: | https://hal.science/hal-03543717 https://hal.science/hal-03543717v2/document https://hal.science/hal-03543717v2/file/Earth%20and%20Space%20Science%20-%202022%20-%20Peureux%20-%20Sea%25E2%2580%2590Ice%20Detection%20From%20Near%25E2%2580%2590Nadir%20Ku%25E2%2580%2590Band%20Echoes%20From%20CFOSAT%20SWIM%20Scatterometer.pdf https://doi.org/10.1029/2021ea002046 |
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ftsorbonneuniv:oai:HAL:hal-03543717v2 2024-06-23T07:56:38+00:00 Sea-Ice Detection From Near-Nadir Ku-Band Echoes From CFOSAT/SWIM Scatterometer Peureux, Charles Longépé, Nicolas Mouche, Alexis Tison, Céline Tourain, Cédric Lachiver, Jean‐michel Hauser, Danièle Collecte Localisation Satellites (CLS) European Space Research Institute (ESRIN) Agence Spatiale Européenne = European Space Agency (ESA) Laboratoire d'Océanographie Physique et Spatiale (LOPS) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Centre National d'Études Spatiales Toulouse (CNES) SPACE - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 2022-01-06 https://hal.science/hal-03543717 https://hal.science/hal-03543717v2/document https://hal.science/hal-03543717v2/file/Earth%20and%20Space%20Science%20-%202022%20-%20Peureux%20-%20Sea%25E2%2580%2590Ice%20Detection%20From%20Near%25E2%2580%2590Nadir%20Ku%25E2%2580%2590Band%20Echoes%20From%20CFOSAT%20SWIM%20Scatterometer.pdf https://doi.org/10.1029/2021ea002046 en eng HAL CCSD American Geophysical Union/Wiley info:eu-repo/semantics/altIdentifier/doi/10.1029/2021ea002046 hal-03543717 https://hal.science/hal-03543717 https://hal.science/hal-03543717v2/document https://hal.science/hal-03543717v2/file/Earth%20and%20Space%20Science%20-%202022%20-%20Peureux%20-%20Sea%25E2%2580%2590Ice%20Detection%20From%20Near%25E2%2580%2590Nadir%20Ku%25E2%2580%2590Band%20Echoes%20From%20CFOSAT%20SWIM%20Scatterometer.pdf doi:10.1029/2021ea002046 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 2333-5084 EISSN: 2333-5084 Earth and Space Science https://hal.science/hal-03543717 Earth and Space Science, 2022, 9 (6), pp.e2021EA002046. ⟨10.1029/2021ea002046⟩ SWIM Radar CFOSAT Mission Ocean Surface Wind Ocean Surface Waves Scatterometer Sea Ice Geophysical Model Function GMF [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2022 ftsorbonneuniv https://doi.org/10.1029/2021ea002046 2024-05-30T23:45:16Z International audience SWIM on board CFOSAT is the first spaceborne, low incidence, rotating scatterometer, aiming at measuring in near-real time ocean waves spectra. With 5 off-nadir beams at incidences between 2 • and 10 • plus one nadir beam, it covers the Earth in 13 days, including polar regions thanks to its polar orbit. This work aims at exploiting the SWIM data over ice regions with two objectives. An off-nadir data-based sea-ice flag is here proposed that allows, first, to eliminate sea-ice polluted echoes for improving the wave spectrum retrieval, and second, to open perspectives for application of sea-ice monitoring with near nadir Ku-band active sensors. To this end, the signature of both open water and sea-ice radar backscatter is parameterized into Geophysical Model Functions. Then, comparisons with observed profiles through a Bayesian scheme provide a probability of sea-ice presence. After comparison with both model (ECMWF-IFS) and radiometer (SSMI) derived reference data sets, the proposed flag is found to be ready for operational use. At latitudes greater than 40 • in absolute value, the proposed flagging algorithm exhibits accuracies of approximately 98% for all beams compared to SSMI data. Beam to beam performances are characterized and show potential for the characterization of sea-ice at Ku band. Article in Journal/Newspaper Sea ice HAL Sorbonne Université Earth and Space Science 9 6 |
institution |
Open Polar |
collection |
HAL Sorbonne Université |
op_collection_id |
ftsorbonneuniv |
language |
English |
topic |
SWIM Radar CFOSAT Mission Ocean Surface Wind Ocean Surface Waves Scatterometer Sea Ice Geophysical Model Function GMF [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
SWIM Radar CFOSAT Mission Ocean Surface Wind Ocean Surface Waves Scatterometer Sea Ice Geophysical Model Function GMF [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Peureux, Charles Longépé, Nicolas Mouche, Alexis Tison, Céline Tourain, Cédric Lachiver, Jean‐michel Hauser, Danièle Sea-Ice Detection From Near-Nadir Ku-Band Echoes From CFOSAT/SWIM Scatterometer |
topic_facet |
SWIM Radar CFOSAT Mission Ocean Surface Wind Ocean Surface Waves Scatterometer Sea Ice Geophysical Model Function GMF [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience SWIM on board CFOSAT is the first spaceborne, low incidence, rotating scatterometer, aiming at measuring in near-real time ocean waves spectra. With 5 off-nadir beams at incidences between 2 • and 10 • plus one nadir beam, it covers the Earth in 13 days, including polar regions thanks to its polar orbit. This work aims at exploiting the SWIM data over ice regions with two objectives. An off-nadir data-based sea-ice flag is here proposed that allows, first, to eliminate sea-ice polluted echoes for improving the wave spectrum retrieval, and second, to open perspectives for application of sea-ice monitoring with near nadir Ku-band active sensors. To this end, the signature of both open water and sea-ice radar backscatter is parameterized into Geophysical Model Functions. Then, comparisons with observed profiles through a Bayesian scheme provide a probability of sea-ice presence. After comparison with both model (ECMWF-IFS) and radiometer (SSMI) derived reference data sets, the proposed flag is found to be ready for operational use. At latitudes greater than 40 • in absolute value, the proposed flagging algorithm exhibits accuracies of approximately 98% for all beams compared to SSMI data. Beam to beam performances are characterized and show potential for the characterization of sea-ice at Ku band. |
author2 |
Collecte Localisation Satellites (CLS) European Space Research Institute (ESRIN) Agence Spatiale Européenne = European Space Agency (ESA) Laboratoire d'Océanographie Physique et Spatiale (LOPS) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Centre National d'Études Spatiales Toulouse (CNES) SPACE - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Peureux, Charles Longépé, Nicolas Mouche, Alexis Tison, Céline Tourain, Cédric Lachiver, Jean‐michel Hauser, Danièle |
author_facet |
Peureux, Charles Longépé, Nicolas Mouche, Alexis Tison, Céline Tourain, Cédric Lachiver, Jean‐michel Hauser, Danièle |
author_sort |
Peureux, Charles |
title |
Sea-Ice Detection From Near-Nadir Ku-Band Echoes From CFOSAT/SWIM Scatterometer |
title_short |
Sea-Ice Detection From Near-Nadir Ku-Band Echoes From CFOSAT/SWIM Scatterometer |
title_full |
Sea-Ice Detection From Near-Nadir Ku-Band Echoes From CFOSAT/SWIM Scatterometer |
title_fullStr |
Sea-Ice Detection From Near-Nadir Ku-Band Echoes From CFOSAT/SWIM Scatterometer |
title_full_unstemmed |
Sea-Ice Detection From Near-Nadir Ku-Band Echoes From CFOSAT/SWIM Scatterometer |
title_sort |
sea-ice detection from near-nadir ku-band echoes from cfosat/swim scatterometer |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.science/hal-03543717 https://hal.science/hal-03543717v2/document https://hal.science/hal-03543717v2/file/Earth%20and%20Space%20Science%20-%202022%20-%20Peureux%20-%20Sea%25E2%2580%2590Ice%20Detection%20From%20Near%25E2%2580%2590Nadir%20Ku%25E2%2580%2590Band%20Echoes%20From%20CFOSAT%20SWIM%20Scatterometer.pdf https://doi.org/10.1029/2021ea002046 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
ISSN: 2333-5084 EISSN: 2333-5084 Earth and Space Science https://hal.science/hal-03543717 Earth and Space Science, 2022, 9 (6), pp.e2021EA002046. ⟨10.1029/2021ea002046⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2021ea002046 hal-03543717 https://hal.science/hal-03543717 https://hal.science/hal-03543717v2/document https://hal.science/hal-03543717v2/file/Earth%20and%20Space%20Science%20-%202022%20-%20Peureux%20-%20Sea%25E2%2580%2590Ice%20Detection%20From%20Near%25E2%2580%2590Nadir%20Ku%25E2%2580%2590Band%20Echoes%20From%20CFOSAT%20SWIM%20Scatterometer.pdf doi:10.1029/2021ea002046 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2021ea002046 |
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Earth and Space Science |
container_volume |
9 |
container_issue |
6 |
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1802649893578211328 |