Resolution enhanced sea ice concentration: a new algorithm applied to AMSR2 microwave radiometry data
Abstract Passive-microwave sea ice concentration (SIC) algorithms employ different frequencies and polarisations in their operational implementations. Commonly, these algorithms utilise combinations such as 19/37 GHz, yielding reduced measurement uncertainties but at a coarse spatial resolution. Alt...
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Online Access: | http://dx.doi.org/10.1017/aog.2024.6 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0260305524000065 |
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crcambridgeupr:10.1017/aog.2024.6 2024-06-09T07:38:27+00:00 Resolution enhanced sea ice concentration: a new algorithm applied to AMSR2 microwave radiometry data Rusin, Jozef Lavergne, Thomas Doulgeris, Anthony P. Scott, K. Andrea Framsenteret Norges Forskningsråd 2024 http://dx.doi.org/10.1017/aog.2024.6 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0260305524000065 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Annals of Glaciology page 1-12 ISSN 0260-3055 1727-5644 journal-article 2024 crcambridgeupr https://doi.org/10.1017/aog.2024.6 2024-05-15T12:59:45Z Abstract Passive-microwave sea ice concentration (SIC) algorithms employ different frequencies and polarisations in their operational implementations. Commonly, these algorithms utilise combinations such as 19/37 GHz, yielding reduced measurement uncertainties but at a coarse spatial resolution. Alternatively, these algorithms can solely use 89 GHz, producing a higher spatial resolution but with increased measurement uncertainties. This study evaluates the application of a resolution-enhancing SIC algorithm (reSICCI3LF), initially developed for the coarser Special Sensor Microwave Imager / Sounder, on the Advanced Microwave Scanning Radiometer. By applying reSICCI3LF, we aim to produce a 5 km SIC for 2013–2020 in the Fram Strait and the Barents and Kara Sea region that gains the benefits of both types of algorithms, high spatial resolution and low measurement uncertainty. We present the algorithm tuning, spectral analysis of spatial resolutions, and validation against the Round Robin Data Package of 0% and 100% SIC points and SIC derived from Landsat-8. The findings demonstrate that the reSICCI3LF algorithm produces a SIC field with fine details, achieving a balance between high spatial resolution and lower measurement uncertainties compared to a 89 GHz based SIC. Consequently, this resolution-enhanced SIC technique can potentially initialise higher-resolution coupled ocean and sea ice forecasting systems through data assimilation. Article in Journal/Newspaper Annals of Glaciology Fram Strait Kara Sea Sea ice Cambridge University Press Kara Sea Annals of Glaciology 1 37 |
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Cambridge University Press |
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crcambridgeupr |
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English |
description |
Abstract Passive-microwave sea ice concentration (SIC) algorithms employ different frequencies and polarisations in their operational implementations. Commonly, these algorithms utilise combinations such as 19/37 GHz, yielding reduced measurement uncertainties but at a coarse spatial resolution. Alternatively, these algorithms can solely use 89 GHz, producing a higher spatial resolution but with increased measurement uncertainties. This study evaluates the application of a resolution-enhancing SIC algorithm (reSICCI3LF), initially developed for the coarser Special Sensor Microwave Imager / Sounder, on the Advanced Microwave Scanning Radiometer. By applying reSICCI3LF, we aim to produce a 5 km SIC for 2013–2020 in the Fram Strait and the Barents and Kara Sea region that gains the benefits of both types of algorithms, high spatial resolution and low measurement uncertainty. We present the algorithm tuning, spectral analysis of spatial resolutions, and validation against the Round Robin Data Package of 0% and 100% SIC points and SIC derived from Landsat-8. The findings demonstrate that the reSICCI3LF algorithm produces a SIC field with fine details, achieving a balance between high spatial resolution and lower measurement uncertainties compared to a 89 GHz based SIC. Consequently, this resolution-enhanced SIC technique can potentially initialise higher-resolution coupled ocean and sea ice forecasting systems through data assimilation. |
author2 |
Framsenteret Norges Forskningsråd |
format |
Article in Journal/Newspaper |
author |
Rusin, Jozef Lavergne, Thomas Doulgeris, Anthony P. Scott, K. Andrea |
spellingShingle |
Rusin, Jozef Lavergne, Thomas Doulgeris, Anthony P. Scott, K. Andrea Resolution enhanced sea ice concentration: a new algorithm applied to AMSR2 microwave radiometry data |
author_facet |
Rusin, Jozef Lavergne, Thomas Doulgeris, Anthony P. Scott, K. Andrea |
author_sort |
Rusin, Jozef |
title |
Resolution enhanced sea ice concentration: a new algorithm applied to AMSR2 microwave radiometry data |
title_short |
Resolution enhanced sea ice concentration: a new algorithm applied to AMSR2 microwave radiometry data |
title_full |
Resolution enhanced sea ice concentration: a new algorithm applied to AMSR2 microwave radiometry data |
title_fullStr |
Resolution enhanced sea ice concentration: a new algorithm applied to AMSR2 microwave radiometry data |
title_full_unstemmed |
Resolution enhanced sea ice concentration: a new algorithm applied to AMSR2 microwave radiometry data |
title_sort |
resolution enhanced sea ice concentration: a new algorithm applied to amsr2 microwave radiometry data |
publisher |
Cambridge University Press (CUP) |
publishDate |
2024 |
url |
http://dx.doi.org/10.1017/aog.2024.6 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0260305524000065 |
geographic |
Kara Sea |
geographic_facet |
Kara Sea |
genre |
Annals of Glaciology Fram Strait Kara Sea Sea ice |
genre_facet |
Annals of Glaciology Fram Strait Kara Sea Sea ice |
op_source |
Annals of Glaciology page 1-12 ISSN 0260-3055 1727-5644 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/aog.2024.6 |
container_title |
Annals of Glaciology |
container_start_page |
1 |
op_container_end_page |
37 |
_version_ |
1801372979955761152 |