Eddies in the Marginal Ice Zone of Fram Strait and Svalbard from Spaceborne SAR Observations in Winter
Here we investigate the intensity of eddy generation and their properties in the marginal ice zone (MIZ) regions of Fram Strait and around Svalbard using spaceborne synthetic aperture radar (SAR) data from Envisat ASAR and Sentinel-1 in winter 2007 and 2018. Analysis of 2039 SAR images allowed ident...
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Multidisciplinary Digital Publishing Institute
2021
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Online Access: | https://doi.org/10.3390/rs14010134 |
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ftmdpi:oai:mdpi.com:/2072-4292/14/1/134/ 2023-08-20T04:04:42+02:00 Eddies in the Marginal Ice Zone of Fram Strait and Svalbard from Spaceborne SAR Observations in Winter Igor E. Kozlov Oksana A. Atadzhanova agris 2021-12-29 application/pdf https://doi.org/10.3390/rs14010134 EN eng Multidisciplinary Digital Publishing Institute Remote Sensing and Geo-Spatial Science https://dx.doi.org/10.3390/rs14010134 https://creativecommons.org/licenses/by/4.0/ Remote Sensing; Volume 14; Issue 1; Pages: 134 ocean eddies marginal ice zone sea ice SAR imaging Fram Strait Svalbard Greenland Sea Hopen Island Arctic Ocean Text 2021 ftmdpi https://doi.org/10.3390/rs14010134 2023-08-01T03:41:47Z Here we investigate the intensity of eddy generation and their properties in the marginal ice zone (MIZ) regions of Fram Strait and around Svalbard using spaceborne synthetic aperture radar (SAR) data from Envisat ASAR and Sentinel-1 in winter 2007 and 2018. Analysis of 2039 SAR images allowed identifying 4619 eddy signatures. The number of eddies detected per image per kilometer of MIZ length is similar for both years. Submesoscale and small mesoscale eddies dominate with cyclones detected twice more frequently than anticyclones. Eddy diameters range from 1 to 68 km with mean values of 6 km and 12 km over shallow and deep water, respectively. Mean eddy size grows with increasing ice concentration in the MIZ, yet most eddies are detected at the ice edge and where the ice concentration is below 20%. The fraction of sea ice trapped in cyclones (53%) is slightly higher than that in anticyclones (48%). The amount of sea ice trapped by a single ‘mean’ eddy is about 40 km2, while the average horizontal retreat of the ice edge due to eddy-induced ice melt is about 0.2–0.5 km·d–1 ± 0.02 km·d–1. Relation of eddy occurrence to background currents and winds is also discussed. Text Arctic Arctic Ocean Fram Strait Greenland Greenland Sea Hopen Hopen island Sea ice Svalbard Hopen MDPI Open Access Publishing Arctic Arctic Ocean Svalbard Greenland Asar ENVELOPE(134.033,134.033,68.667,68.667) Hopen ENVELOPE(9.279,9.279,63.379,63.379) Remote Sensing 14 1 134 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
ocean eddies marginal ice zone sea ice SAR imaging Fram Strait Svalbard Greenland Sea Hopen Island Arctic Ocean |
spellingShingle |
ocean eddies marginal ice zone sea ice SAR imaging Fram Strait Svalbard Greenland Sea Hopen Island Arctic Ocean Igor E. Kozlov Oksana A. Atadzhanova Eddies in the Marginal Ice Zone of Fram Strait and Svalbard from Spaceborne SAR Observations in Winter |
topic_facet |
ocean eddies marginal ice zone sea ice SAR imaging Fram Strait Svalbard Greenland Sea Hopen Island Arctic Ocean |
description |
Here we investigate the intensity of eddy generation and their properties in the marginal ice zone (MIZ) regions of Fram Strait and around Svalbard using spaceborne synthetic aperture radar (SAR) data from Envisat ASAR and Sentinel-1 in winter 2007 and 2018. Analysis of 2039 SAR images allowed identifying 4619 eddy signatures. The number of eddies detected per image per kilometer of MIZ length is similar for both years. Submesoscale and small mesoscale eddies dominate with cyclones detected twice more frequently than anticyclones. Eddy diameters range from 1 to 68 km with mean values of 6 km and 12 km over shallow and deep water, respectively. Mean eddy size grows with increasing ice concentration in the MIZ, yet most eddies are detected at the ice edge and where the ice concentration is below 20%. The fraction of sea ice trapped in cyclones (53%) is slightly higher than that in anticyclones (48%). The amount of sea ice trapped by a single ‘mean’ eddy is about 40 km2, while the average horizontal retreat of the ice edge due to eddy-induced ice melt is about 0.2–0.5 km·d–1 ± 0.02 km·d–1. Relation of eddy occurrence to background currents and winds is also discussed. |
format |
Text |
author |
Igor E. Kozlov Oksana A. Atadzhanova |
author_facet |
Igor E. Kozlov Oksana A. Atadzhanova |
author_sort |
Igor E. Kozlov |
title |
Eddies in the Marginal Ice Zone of Fram Strait and Svalbard from Spaceborne SAR Observations in Winter |
title_short |
Eddies in the Marginal Ice Zone of Fram Strait and Svalbard from Spaceborne SAR Observations in Winter |
title_full |
Eddies in the Marginal Ice Zone of Fram Strait and Svalbard from Spaceborne SAR Observations in Winter |
title_fullStr |
Eddies in the Marginal Ice Zone of Fram Strait and Svalbard from Spaceborne SAR Observations in Winter |
title_full_unstemmed |
Eddies in the Marginal Ice Zone of Fram Strait and Svalbard from Spaceborne SAR Observations in Winter |
title_sort |
eddies in the marginal ice zone of fram strait and svalbard from spaceborne sar observations in winter |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2021 |
url |
https://doi.org/10.3390/rs14010134 |
op_coverage |
agris |
long_lat |
ENVELOPE(134.033,134.033,68.667,68.667) ENVELOPE(9.279,9.279,63.379,63.379) |
geographic |
Arctic Arctic Ocean Svalbard Greenland Asar Hopen |
geographic_facet |
Arctic Arctic Ocean Svalbard Greenland Asar Hopen |
genre |
Arctic Arctic Ocean Fram Strait Greenland Greenland Sea Hopen Hopen island Sea ice Svalbard Hopen |
genre_facet |
Arctic Arctic Ocean Fram Strait Greenland Greenland Sea Hopen Hopen island Sea ice Svalbard Hopen |
op_source |
Remote Sensing; Volume 14; Issue 1; Pages: 134 |
op_relation |
Remote Sensing and Geo-Spatial Science https://dx.doi.org/10.3390/rs14010134 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/rs14010134 |
container_title |
Remote Sensing |
container_volume |
14 |
container_issue |
1 |
container_start_page |
134 |
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1774715072794329088 |