Landfast sea ice break out patterns in the northern Bering Sea observed from C-band Synthetic Aperture Radar
Arctic sea ice is declining in areal extent and seasonal duration, affecting stable landfast sea ice regimes. These landfast ice regimes are vital platforms for local indigenous subsistence hunters and epontic primary production species supporting local and regional food webs. Under changing thermod...
Published in: | International Journal of Applied Earth Observation and Geoinformation |
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Online Access: | https://doi.org/10.1016/j.jag.2023.103183 https://doaj.org/article/1eb5c377428647739f20246feebc6224 |
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ftdoajarticles:oai:doaj.org/article:1eb5c377428647739f20246feebc6224 2023-05-15T15:11:41+02:00 Landfast sea ice break out patterns in the northern Bering Sea observed from C-band Synthetic Aperture Radar David A. Jensen Vishnu Nandan Andrew R. Mahoney John J. Yackel Lynn M. Resler 2023-03-01T00:00:00Z https://doi.org/10.1016/j.jag.2023.103183 https://doaj.org/article/1eb5c377428647739f20246feebc6224 EN eng Elsevier http://www.sciencedirect.com/science/article/pii/S1569843223000055 https://doaj.org/toc/1569-8432 1569-8432 doi:10.1016/j.jag.2023.103183 https://doaj.org/article/1eb5c377428647739f20246feebc6224 International Journal of Applied Earth Observations and Geoinformation, Vol 117, Iss , Pp 103183- (2023) Landfast Sea Ice Break Out Synthetic Aperture Radar Physical geography GB3-5030 Environmental sciences GE1-350 article 2023 ftdoajarticles https://doi.org/10.1016/j.jag.2023.103183 2023-02-19T01:45:55Z Arctic sea ice is declining in areal extent and seasonal duration, affecting stable landfast sea ice regimes. These landfast ice regimes are vital platforms for local indigenous subsistence hunters and epontic primary production species supporting local and regional food webs. Under changing thermodynamic and mechanical stresses, landfast ice can become more prone to break out events - unexpected mid-season detachments from the coastline. However, the prevalence of break out events in the landfast ice annual cycle on an interannual and decadal basis is generally understudied. Here, we detect and quantify landfast ice break-out events at St. Lawrence Island in the Northern Bering Sea. We accomplished this using C-band Synthetic Aperture Radar (SAR) imagery to detect landfast ice cover. We also advanced a geospatial analysis method to identify break-out events and distinguish such occurrences from end-of-season breakups. Results reveal that 35 break-outs occurred across four sections of the St. Lawrence Island coastline from 1996 − 2019, with 74 % of break-outs occurring on the northern coastlines. Break-outs generally occurred during annual cycles with higher than average landfast ice cover. During the break-out events, maximum temperatures seldom exceed conditions promoting melt, whereas wind speeds are, on average, 2 m/s faster compared to end-of-season breakup events. However, additional datasets are needed to understand better the influence of tidal amplitude and ocean currents on detected break-out occurrence and location. Our study provides the basis for future research to understand break-out events in landfast ice annual cycles at fine spatial scales unavailable in existing sea ice datasets. Article in Journal/Newspaper Arctic Bering Sea Sea ice St Lawrence Island Directory of Open Access Journals: DOAJ Articles Arctic Bering Sea Lawrence Island ENVELOPE(-103.718,-103.718,56.967,56.967) International Journal of Applied Earth Observation and Geoinformation 117 103183 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Landfast Sea Ice Break Out Synthetic Aperture Radar Physical geography GB3-5030 Environmental sciences GE1-350 |
spellingShingle |
Landfast Sea Ice Break Out Synthetic Aperture Radar Physical geography GB3-5030 Environmental sciences GE1-350 David A. Jensen Vishnu Nandan Andrew R. Mahoney John J. Yackel Lynn M. Resler Landfast sea ice break out patterns in the northern Bering Sea observed from C-band Synthetic Aperture Radar |
topic_facet |
Landfast Sea Ice Break Out Synthetic Aperture Radar Physical geography GB3-5030 Environmental sciences GE1-350 |
description |
Arctic sea ice is declining in areal extent and seasonal duration, affecting stable landfast sea ice regimes. These landfast ice regimes are vital platforms for local indigenous subsistence hunters and epontic primary production species supporting local and regional food webs. Under changing thermodynamic and mechanical stresses, landfast ice can become more prone to break out events - unexpected mid-season detachments from the coastline. However, the prevalence of break out events in the landfast ice annual cycle on an interannual and decadal basis is generally understudied. Here, we detect and quantify landfast ice break-out events at St. Lawrence Island in the Northern Bering Sea. We accomplished this using C-band Synthetic Aperture Radar (SAR) imagery to detect landfast ice cover. We also advanced a geospatial analysis method to identify break-out events and distinguish such occurrences from end-of-season breakups. Results reveal that 35 break-outs occurred across four sections of the St. Lawrence Island coastline from 1996 − 2019, with 74 % of break-outs occurring on the northern coastlines. Break-outs generally occurred during annual cycles with higher than average landfast ice cover. During the break-out events, maximum temperatures seldom exceed conditions promoting melt, whereas wind speeds are, on average, 2 m/s faster compared to end-of-season breakup events. However, additional datasets are needed to understand better the influence of tidal amplitude and ocean currents on detected break-out occurrence and location. Our study provides the basis for future research to understand break-out events in landfast ice annual cycles at fine spatial scales unavailable in existing sea ice datasets. |
format |
Article in Journal/Newspaper |
author |
David A. Jensen Vishnu Nandan Andrew R. Mahoney John J. Yackel Lynn M. Resler |
author_facet |
David A. Jensen Vishnu Nandan Andrew R. Mahoney John J. Yackel Lynn M. Resler |
author_sort |
David A. Jensen |
title |
Landfast sea ice break out patterns in the northern Bering Sea observed from C-band Synthetic Aperture Radar |
title_short |
Landfast sea ice break out patterns in the northern Bering Sea observed from C-band Synthetic Aperture Radar |
title_full |
Landfast sea ice break out patterns in the northern Bering Sea observed from C-band Synthetic Aperture Radar |
title_fullStr |
Landfast sea ice break out patterns in the northern Bering Sea observed from C-band Synthetic Aperture Radar |
title_full_unstemmed |
Landfast sea ice break out patterns in the northern Bering Sea observed from C-band Synthetic Aperture Radar |
title_sort |
landfast sea ice break out patterns in the northern bering sea observed from c-band synthetic aperture radar |
publisher |
Elsevier |
publishDate |
2023 |
url |
https://doi.org/10.1016/j.jag.2023.103183 https://doaj.org/article/1eb5c377428647739f20246feebc6224 |
long_lat |
ENVELOPE(-103.718,-103.718,56.967,56.967) |
geographic |
Arctic Bering Sea Lawrence Island |
geographic_facet |
Arctic Bering Sea Lawrence Island |
genre |
Arctic Bering Sea Sea ice St Lawrence Island |
genre_facet |
Arctic Bering Sea Sea ice St Lawrence Island |
op_source |
International Journal of Applied Earth Observations and Geoinformation, Vol 117, Iss , Pp 103183- (2023) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S1569843223000055 https://doaj.org/toc/1569-8432 1569-8432 doi:10.1016/j.jag.2023.103183 https://doaj.org/article/1eb5c377428647739f20246feebc6224 |
op_doi |
https://doi.org/10.1016/j.jag.2023.103183 |
container_title |
International Journal of Applied Earth Observation and Geoinformation |
container_volume |
117 |
container_start_page |
103183 |
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1766342510388445184 |