An algorithm to detect sea ice leads by using AMSR-E passive microwave imagery
Leads are major sites of energy fluxes and brine releases at the air-ocean interface of sea-ice covered oceans. This study presents an algorithm to detect leads wider than 3 km in the entire Arctic Ocean. The algorithm detects 50 % of the lead area that was visible in optical MODIS satellite images....
Published in: | The Cryosphere |
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Copernicus Publications
2012
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Online Access: | https://doi.org/10.5194/tc-6-343-2012 https://doaj.org/article/4548344f9feb434f8a160892477057e1 |
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ftdoajarticles:oai:doaj.org/article:4548344f9feb434f8a160892477057e1 2023-05-15T14:56:10+02:00 An algorithm to detect sea ice leads by using AMSR-E passive microwave imagery J. Röhrs L. Kaleschke 2012-03-01T00:00:00Z https://doi.org/10.5194/tc-6-343-2012 https://doaj.org/article/4548344f9feb434f8a160892477057e1 EN eng Copernicus Publications http://www.the-cryosphere.net/6/343/2012/tc-6-343-2012.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-6-343-2012 1994-0416 1994-0424 https://doaj.org/article/4548344f9feb434f8a160892477057e1 The Cryosphere, Vol 6, Iss 2, Pp 343-352 (2012) Environmental sciences GE1-350 Geology QE1-996.5 article 2012 ftdoajarticles https://doi.org/10.5194/tc-6-343-2012 2022-12-30T21:28:12Z Leads are major sites of energy fluxes and brine releases at the air-ocean interface of sea-ice covered oceans. This study presents an algorithm to detect leads wider than 3 km in the entire Arctic Ocean. The algorithm detects 50 % of the lead area that was visible in optical MODIS satellite images. Passive microwave imagery from the Advanced Microwave Scanning Radiometer – Earth Observation System (AMSR-E) is used, allowing daily observations due to the fact that AMSR-E does not depend on daylight or cloud conditions. Using the unique signatures of thin ice in the brightness temperature ratio between the 89 GHz and 19 GHz channels, the algorithm is able to detect thin ice areas in the ice cover and is optimized to detect leads. Leads are mapped for the period from 2002 to 2011 excluding the summer months, and validated qualitatively by using MODIS, Envisat ASAR, and CryoSat-2 data. Several frequently recurring large scale lead patterns are found, especially in regions where sea ice is known to drift out of the Arctic Ocean. Article in Journal/Newspaper Arctic Arctic Ocean Sea ice The Cryosphere Directory of Open Access Journals: DOAJ Articles Arctic Arctic Ocean Asar ENVELOPE(134.033,134.033,68.667,68.667) The Cryosphere 6 2 343 352 |
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 J. Röhrs L. Kaleschke An algorithm to detect sea ice leads by using AMSR-E passive microwave imagery |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
Leads are major sites of energy fluxes and brine releases at the air-ocean interface of sea-ice covered oceans. This study presents an algorithm to detect leads wider than 3 km in the entire Arctic Ocean. The algorithm detects 50 % of the lead area that was visible in optical MODIS satellite images. Passive microwave imagery from the Advanced Microwave Scanning Radiometer – Earth Observation System (AMSR-E) is used, allowing daily observations due to the fact that AMSR-E does not depend on daylight or cloud conditions. Using the unique signatures of thin ice in the brightness temperature ratio between the 89 GHz and 19 GHz channels, the algorithm is able to detect thin ice areas in the ice cover and is optimized to detect leads. Leads are mapped for the period from 2002 to 2011 excluding the summer months, and validated qualitatively by using MODIS, Envisat ASAR, and CryoSat-2 data. Several frequently recurring large scale lead patterns are found, especially in regions where sea ice is known to drift out of the Arctic Ocean. |
format |
Article in Journal/Newspaper |
author |
J. Röhrs L. Kaleschke |
author_facet |
J. Röhrs L. Kaleschke |
author_sort |
J. Röhrs |
title |
An algorithm to detect sea ice leads by using AMSR-E passive microwave imagery |
title_short |
An algorithm to detect sea ice leads by using AMSR-E passive microwave imagery |
title_full |
An algorithm to detect sea ice leads by using AMSR-E passive microwave imagery |
title_fullStr |
An algorithm to detect sea ice leads by using AMSR-E passive microwave imagery |
title_full_unstemmed |
An algorithm to detect sea ice leads by using AMSR-E passive microwave imagery |
title_sort |
algorithm to detect sea ice leads by using amsr-e passive microwave imagery |
publisher |
Copernicus Publications |
publishDate |
2012 |
url |
https://doi.org/10.5194/tc-6-343-2012 https://doaj.org/article/4548344f9feb434f8a160892477057e1 |
long_lat |
ENVELOPE(134.033,134.033,68.667,68.667) |
geographic |
Arctic Arctic Ocean Asar |
geographic_facet |
Arctic Arctic Ocean Asar |
genre |
Arctic Arctic Ocean Sea ice The Cryosphere |
genre_facet |
Arctic Arctic Ocean Sea ice The Cryosphere |
op_source |
The Cryosphere, Vol 6, Iss 2, Pp 343-352 (2012) |
op_relation |
http://www.the-cryosphere.net/6/343/2012/tc-6-343-2012.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-6-343-2012 1994-0416 1994-0424 https://doaj.org/article/4548344f9feb434f8a160892477057e1 |
op_doi |
https://doi.org/10.5194/tc-6-343-2012 |
container_title |
The Cryosphere |
container_volume |
6 |
container_issue |
2 |
container_start_page |
343 |
op_container_end_page |
352 |
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1766328196351918080 |