Estimates of ocean wave heights and attenuation in sea ice using the SAR wave mode on Sentinel-1A
International audience Swell evolution from the open ocean into sea ice is poorly understood, in particular the amplitude attenuation expected from scattering and dissipation. New synthetic aperture radar (SAR) data from Sentinel-1A wave mode reveal intriguing patterns of bright oscillating lines sh...
Published in: | Geophysical Research Letters |
---|---|
Main Authors: | , , , , , , |
Other Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2015
|
Subjects: | |
Online Access: | https://hal.science/hal-01151047 https://doi.org/10.1002/2014GL062940 |
id |
ftunivbrest:oai:HAL:hal-01151047v1 |
---|---|
record_format |
openpolar |
spelling |
ftunivbrest:oai:HAL:hal-01151047v1 2023-12-17T10:31:42+01:00 Estimates of ocean wave heights and attenuation in sea ice using the SAR wave mode on Sentinel-1A Ardhuin, Fabrice Collard, Fabrice Chapron, Bertrand Girard-Ardhuin, Fanny Guitton, Gilles Mouche, Alexis Stopa, Justin E. Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'Océanographie Spatiale (LOS) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) OceanDataLab 2015-04 https://hal.science/hal-01151047 https://doi.org/10.1002/2014GL062940 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1002/2014GL062940 hal-01151047 https://hal.science/hal-01151047 doi:10.1002/2014GL062940 ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-01151047 Geophysical Research Letters, 2015, 42 (7), pp.2317-2325. ⟨10.1002/2014GL062940⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2015 ftunivbrest https://doi.org/10.1002/2014GL062940 2023-11-21T23:43:36Z International audience Swell evolution from the open ocean into sea ice is poorly understood, in particular the amplitude attenuation expected from scattering and dissipation. New synthetic aperture radar (SAR) data from Sentinel-1A wave mode reveal intriguing patterns of bright oscillating lines shaped like instant noodles. We investigate cases in which the oscillations are in the azimuth direction, around a straight line in the range direction. This observation is interpreted as the distortion by the SAR processing of crests from a first swell, due to the presence of a second swell. Since deviations from a straight line should be proportional to the orbital velocity toward the satellite, swell height can be estimated, from 1.5 to 5 m in the present case. The evolution of this 13 s period swell across the ice pack is consistent with an exponential attenuation on a length scale of 200 km. Article in Journal/Newspaper ice pack Sea ice Université de Bretagne Occidentale: HAL Geophysical Research Letters 42 7 2317 2325 |
institution |
Open Polar |
collection |
Université de Bretagne Occidentale: HAL |
op_collection_id |
ftunivbrest |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Ardhuin, Fabrice Collard, Fabrice Chapron, Bertrand Girard-Ardhuin, Fanny Guitton, Gilles Mouche, Alexis Stopa, Justin E. Estimates of ocean wave heights and attenuation in sea ice using the SAR wave mode on Sentinel-1A |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Swell evolution from the open ocean into sea ice is poorly understood, in particular the amplitude attenuation expected from scattering and dissipation. New synthetic aperture radar (SAR) data from Sentinel-1A wave mode reveal intriguing patterns of bright oscillating lines shaped like instant noodles. We investigate cases in which the oscillations are in the azimuth direction, around a straight line in the range direction. This observation is interpreted as the distortion by the SAR processing of crests from a first swell, due to the presence of a second swell. Since deviations from a straight line should be proportional to the orbital velocity toward the satellite, swell height can be estimated, from 1.5 to 5 m in the present case. The evolution of this 13 s period swell across the ice pack is consistent with an exponential attenuation on a length scale of 200 km. |
author2 |
Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'Océanographie Spatiale (LOS) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) OceanDataLab |
format |
Article in Journal/Newspaper |
author |
Ardhuin, Fabrice Collard, Fabrice Chapron, Bertrand Girard-Ardhuin, Fanny Guitton, Gilles Mouche, Alexis Stopa, Justin E. |
author_facet |
Ardhuin, Fabrice Collard, Fabrice Chapron, Bertrand Girard-Ardhuin, Fanny Guitton, Gilles Mouche, Alexis Stopa, Justin E. |
author_sort |
Ardhuin, Fabrice |
title |
Estimates of ocean wave heights and attenuation in sea ice using the SAR wave mode on Sentinel-1A |
title_short |
Estimates of ocean wave heights and attenuation in sea ice using the SAR wave mode on Sentinel-1A |
title_full |
Estimates of ocean wave heights and attenuation in sea ice using the SAR wave mode on Sentinel-1A |
title_fullStr |
Estimates of ocean wave heights and attenuation in sea ice using the SAR wave mode on Sentinel-1A |
title_full_unstemmed |
Estimates of ocean wave heights and attenuation in sea ice using the SAR wave mode on Sentinel-1A |
title_sort |
estimates of ocean wave heights and attenuation in sea ice using the sar wave mode on sentinel-1a |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.science/hal-01151047 https://doi.org/10.1002/2014GL062940 |
genre |
ice pack Sea ice |
genre_facet |
ice pack Sea ice |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-01151047 Geophysical Research Letters, 2015, 42 (7), pp.2317-2325. ⟨10.1002/2014GL062940⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/2014GL062940 hal-01151047 https://hal.science/hal-01151047 doi:10.1002/2014GL062940 |
op_doi |
https://doi.org/10.1002/2014GL062940 |
container_title |
Geophysical Research Letters |
container_volume |
42 |
container_issue |
7 |
container_start_page |
2317 |
op_container_end_page |
2325 |
_version_ |
1785585075984793600 |