Kara and Barents sea ice thickness estimation based on CryoSat-2 radar altimeter and Sentinel-1 dual-polarized synthetic aperture radar
We present a method to combine CryoSat-2 (CS2) radar altimeter and Sentinel-1 synthetic aperture radar (SAR) data to obtain sea ice thickness (SIT) estimates for the Barents and Kara seas. From the viewpoint of tactical navigation, along-track altimeter SIT estimates are sparse, and the goal of our...
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/343727 2024-01-07T09:42:25+01:00 Kara and Barents sea ice thickness estimation based on CryoSat-2 radar altimeter and Sentinel-1 dual-polarized synthetic aperture radar Karvonen, Juha Rinne, Eero Sallila, Heidi J Uotila, Petteri Mäkynen, Marko Institute for Atmospheric and Earth System Research (INAR) 2022-05-16T14:31:05Z 24 application/pdf http://hdl.handle.net/10138/343727 eng eng COPERNICUS GESELLSCHAFT MBH 10.5194/tc-16-1821-2022 Karvonen , J , Rinne , E , Sallila , H J , Uotila , P & Mäkynen , M 2022 , ' Kara and Barents sea ice thickness estimation based on CryoSat-2 radar altimeter and Sentinel-1 dual-polarized synthetic aperture radar ' , Cryosphere , vol. 16 , no. 5 , pp. 1821-1844 . https://doi.org/10.5194/tc-16-1821-2022 ORCID: /0000-0002-2939-7561/work/113363984 aab08589-cb5c-4e33-925b-019db23196e4 http://hdl.handle.net/10138/343727 000794371400001 cc_by openAccess info:eu-repo/semantics/openAccess 114 Physical sciences 1171 Geosciences Article publishedVersion 2022 ftunivhelsihelda 2023-12-14T00:06:12Z We present a method to combine CryoSat-2 (CS2) radar altimeter and Sentinel-1 synthetic aperture radar (SAR) data to obtain sea ice thickness (SIT) estimates for the Barents and Kara seas. From the viewpoint of tactical navigation, along-track altimeter SIT estimates are sparse, and the goal of our study is to develop a method to interpolate altimeter SIT measurements between CS2 ground tracks. The SIT estimation method developed here is based on the interpolation of CS2 SIT utilizing SAR segmentation and segmentwise SAR texture features. The SIT results are compared to SIT data derived from the AARI ice charts; to ORAS5, PIOMAS and TOPAZ4 ocean-sea ice data assimilation system reanalyses; to combined CS2 and Soil Moisture and Ocean Salinity (SMOS) radiometer weekly SIT (CS2SMOS SIT) charts; and to the daily MODIS (Moderate Resolution Imaging Spectro-radiometer) SIT chart. We studied two approaches: CS2 directly interpolated to SAR segments and CS2 SIT interpolated to SAR segments with mapping of the CS2 SIT distributions to correspond to SIT distribution of the PIOMAS ice model. Our approaches yield larger spatial coverage and better accuracy compared to SIT estimates based on either CS2 or SAR data alone. The agreement with modelled SIT is better than with the CS2SMOS SIT. The average differences when compared to ice models and the AARI ice chart SIT were typically tens of centimetres, and there was a significant positive bias when compared to the AARI SIT (on average 27 cm) and a similar bias (24 cm) when compared to the CS2SMOS SIT. Our results are directly applicable to the future CRISTAL mission and Copernicus programme SAR missions. Peer reviewed Article in Journal/Newspaper Barents Sea Sea ice HELDA – University of Helsinki Open Repository Barents Sea The Cryosphere 16 5 1821 1844 |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
114 Physical sciences 1171 Geosciences |
spellingShingle |
114 Physical sciences 1171 Geosciences Karvonen, Juha Rinne, Eero Sallila, Heidi J Uotila, Petteri Mäkynen, Marko Kara and Barents sea ice thickness estimation based on CryoSat-2 radar altimeter and Sentinel-1 dual-polarized synthetic aperture radar |
topic_facet |
114 Physical sciences 1171 Geosciences |
description |
We present a method to combine CryoSat-2 (CS2) radar altimeter and Sentinel-1 synthetic aperture radar (SAR) data to obtain sea ice thickness (SIT) estimates for the Barents and Kara seas. From the viewpoint of tactical navigation, along-track altimeter SIT estimates are sparse, and the goal of our study is to develop a method to interpolate altimeter SIT measurements between CS2 ground tracks. The SIT estimation method developed here is based on the interpolation of CS2 SIT utilizing SAR segmentation and segmentwise SAR texture features. The SIT results are compared to SIT data derived from the AARI ice charts; to ORAS5, PIOMAS and TOPAZ4 ocean-sea ice data assimilation system reanalyses; to combined CS2 and Soil Moisture and Ocean Salinity (SMOS) radiometer weekly SIT (CS2SMOS SIT) charts; and to the daily MODIS (Moderate Resolution Imaging Spectro-radiometer) SIT chart. We studied two approaches: CS2 directly interpolated to SAR segments and CS2 SIT interpolated to SAR segments with mapping of the CS2 SIT distributions to correspond to SIT distribution of the PIOMAS ice model. Our approaches yield larger spatial coverage and better accuracy compared to SIT estimates based on either CS2 or SAR data alone. The agreement with modelled SIT is better than with the CS2SMOS SIT. The average differences when compared to ice models and the AARI ice chart SIT were typically tens of centimetres, and there was a significant positive bias when compared to the AARI SIT (on average 27 cm) and a similar bias (24 cm) when compared to the CS2SMOS SIT. Our results are directly applicable to the future CRISTAL mission and Copernicus programme SAR missions. Peer reviewed |
author2 |
Institute for Atmospheric and Earth System Research (INAR) |
format |
Article in Journal/Newspaper |
author |
Karvonen, Juha Rinne, Eero Sallila, Heidi J Uotila, Petteri Mäkynen, Marko |
author_facet |
Karvonen, Juha Rinne, Eero Sallila, Heidi J Uotila, Petteri Mäkynen, Marko |
author_sort |
Karvonen, Juha |
title |
Kara and Barents sea ice thickness estimation based on CryoSat-2 radar altimeter and Sentinel-1 dual-polarized synthetic aperture radar |
title_short |
Kara and Barents sea ice thickness estimation based on CryoSat-2 radar altimeter and Sentinel-1 dual-polarized synthetic aperture radar |
title_full |
Kara and Barents sea ice thickness estimation based on CryoSat-2 radar altimeter and Sentinel-1 dual-polarized synthetic aperture radar |
title_fullStr |
Kara and Barents sea ice thickness estimation based on CryoSat-2 radar altimeter and Sentinel-1 dual-polarized synthetic aperture radar |
title_full_unstemmed |
Kara and Barents sea ice thickness estimation based on CryoSat-2 radar altimeter and Sentinel-1 dual-polarized synthetic aperture radar |
title_sort |
kara and barents sea ice thickness estimation based on cryosat-2 radar altimeter and sentinel-1 dual-polarized synthetic aperture radar |
publisher |
COPERNICUS GESELLSCHAFT MBH |
publishDate |
2022 |
url |
http://hdl.handle.net/10138/343727 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Barents Sea Sea ice |
genre_facet |
Barents Sea Sea ice |
op_relation |
10.5194/tc-16-1821-2022 Karvonen , J , Rinne , E , Sallila , H J , Uotila , P & Mäkynen , M 2022 , ' Kara and Barents sea ice thickness estimation based on CryoSat-2 radar altimeter and Sentinel-1 dual-polarized synthetic aperture radar ' , Cryosphere , vol. 16 , no. 5 , pp. 1821-1844 . https://doi.org/10.5194/tc-16-1821-2022 ORCID: /0000-0002-2939-7561/work/113363984 aab08589-cb5c-4e33-925b-019db23196e4 http://hdl.handle.net/10138/343727 000794371400001 |
op_rights |
cc_by openAccess info:eu-repo/semantics/openAccess |
container_title |
The Cryosphere |
container_volume |
16 |
container_issue |
5 |
container_start_page |
1821 |
op_container_end_page |
1844 |
_version_ |
1787423380829372416 |