Lead detection in Arctic sea ice from CryoSat-2: quality assessment, lead area fraction and width distribution
Leads cover only a small fraction of the Arctic sea ice but they have a dominant effect on the turbulent exchange between the ocean and the atmosphere. A supervised classification of CryoSat-2 measurements is performed by a comparison with visual MODIS scenes. For several parameters thresholds are o...
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ftdoajarticles:oai:doaj.org/article:b7384cfdc60a409db82a223535033ef5 2023-05-15T14:49:39+02:00 Lead detection in Arctic sea ice from CryoSat-2: quality assessment, lead area fraction and width distribution A. Wernecke L. Kaleschke 2015-10-01T00:00:00Z https://doi.org/10.5194/tc-9-1955-2015 https://doaj.org/article/b7384cfdc60a409db82a223535033ef5 EN eng Copernicus Publications http://www.the-cryosphere.net/9/1955/2015/tc-9-1955-2015.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 1994-0416 1994-0424 doi:10.5194/tc-9-1955-2015 https://doaj.org/article/b7384cfdc60a409db82a223535033ef5 The Cryosphere, Vol 9, Iss 5, Pp 1955-1968 (2015) Environmental sciences GE1-350 Geology QE1-996.5 article 2015 ftdoajarticles https://doi.org/10.5194/tc-9-1955-2015 2022-12-31T12:51:13Z Leads cover only a small fraction of the Arctic sea ice but they have a dominant effect on the turbulent exchange between the ocean and the atmosphere. A supervised classification of CryoSat-2 measurements is performed by a comparison with visual MODIS scenes. For several parameters thresholds are optimized and tested in order to reproduce this prior classification. The maximum power of the waveform shows the best classification properties amongst them, including the pulse peakiness. The sea surface height is derived and its spread is clearly reduced for a classifier based on the maximum power compared to published ones. Lead area fraction estimates based on CryoSat-2 show a major fracturing event in the Beaufort Sea in 2013. The resulting Arctic-wide lead width distribution follows a power law with an exponent of 2.47 ± 0.04 for the winter seasons from 2011 to 2014, confirming and complementing a regional study based on a high-resolution SPOT image. Article in Journal/Newspaper Arctic Beaufort Sea Sea ice The Cryosphere Directory of Open Access Journals: DOAJ Articles Arctic The Cryosphere 9 5 1955 1968 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 A. Wernecke L. Kaleschke Lead detection in Arctic sea ice from CryoSat-2: quality assessment, lead area fraction and width distribution |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
Leads cover only a small fraction of the Arctic sea ice but they have a dominant effect on the turbulent exchange between the ocean and the atmosphere. A supervised classification of CryoSat-2 measurements is performed by a comparison with visual MODIS scenes. For several parameters thresholds are optimized and tested in order to reproduce this prior classification. The maximum power of the waveform shows the best classification properties amongst them, including the pulse peakiness. The sea surface height is derived and its spread is clearly reduced for a classifier based on the maximum power compared to published ones. Lead area fraction estimates based on CryoSat-2 show a major fracturing event in the Beaufort Sea in 2013. The resulting Arctic-wide lead width distribution follows a power law with an exponent of 2.47 ± 0.04 for the winter seasons from 2011 to 2014, confirming and complementing a regional study based on a high-resolution SPOT image. |
format |
Article in Journal/Newspaper |
author |
A. Wernecke L. Kaleschke |
author_facet |
A. Wernecke L. Kaleschke |
author_sort |
A. Wernecke |
title |
Lead detection in Arctic sea ice from CryoSat-2: quality assessment, lead area fraction and width distribution |
title_short |
Lead detection in Arctic sea ice from CryoSat-2: quality assessment, lead area fraction and width distribution |
title_full |
Lead detection in Arctic sea ice from CryoSat-2: quality assessment, lead area fraction and width distribution |
title_fullStr |
Lead detection in Arctic sea ice from CryoSat-2: quality assessment, lead area fraction and width distribution |
title_full_unstemmed |
Lead detection in Arctic sea ice from CryoSat-2: quality assessment, lead area fraction and width distribution |
title_sort |
lead detection in arctic sea ice from cryosat-2: quality assessment, lead area fraction and width distribution |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/tc-9-1955-2015 https://doaj.org/article/b7384cfdc60a409db82a223535033ef5 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Beaufort Sea Sea ice The Cryosphere |
genre_facet |
Arctic Beaufort Sea Sea ice The Cryosphere |
op_source |
The Cryosphere, Vol 9, Iss 5, Pp 1955-1968 (2015) |
op_relation |
http://www.the-cryosphere.net/9/1955/2015/tc-9-1955-2015.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 1994-0416 1994-0424 doi:10.5194/tc-9-1955-2015 https://doaj.org/article/b7384cfdc60a409db82a223535033ef5 |
op_doi |
https://doi.org/10.5194/tc-9-1955-2015 |
container_title |
The Cryosphere |
container_volume |
9 |
container_issue |
5 |
container_start_page |
1955 |
op_container_end_page |
1968 |
_version_ |
1766320735407570944 |