A New Algorithm for Daily Sea Ice Lead Identification in the Arctic and Antarctic Winter from Thermal-Infrared Satellite Imagery
The presence of sea ice leads in the sea ice cover represents a key feature in polar regions by controlling the heat exchange between the relatively warm ocean and cold atmosphere due to increased fluxes of turbulent sensible and latent heat. Sea ice leads contribute to the sea ice production and ar...
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Online Access: | https://doi.org/10.3390/rs12121957 |
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ftmdpi:oai:mdpi.com:/2072-4292/12/12/1957/ 2023-08-20T04:00:39+02:00 A New Algorithm for Daily Sea Ice Lead Identification in the Arctic and Antarctic Winter from Thermal-Infrared Satellite Imagery Fabian Reiser Sascha Willmes Günther Heinemann agris 2020-06-17 application/pdf https://doi.org/10.3390/rs12121957 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/rs12121957 https://creativecommons.org/licenses/by/4.0/ Remote Sensing; Volume 12; Issue 12; Pages: 1957 sea ice leads MODIS Arctic Antarctic polar regions image processing fuzzy logic thermal infrared remote sensing Text 2020 ftmdpi https://doi.org/10.3390/rs12121957 2023-07-31T23:39:11Z The presence of sea ice leads in the sea ice cover represents a key feature in polar regions by controlling the heat exchange between the relatively warm ocean and cold atmosphere due to increased fluxes of turbulent sensible and latent heat. Sea ice leads contribute to the sea ice production and are sources for the formation of dense water which affects the ocean circulation. Atmospheric and ocean models strongly rely on observational data to describe the respective state of the sea ice since numerical models are not able to produce sea ice leads explicitly. For the Arctic, some lead datasets are available, but for the Antarctic, no such data yet exist. Our study presents a new algorithm with which leads are automatically identified in satellite thermal infrared images. A variety of lead metrics is used to distinguish between true leads and detection artefacts with the use of fuzzy logic. We evaluate the outputs and provide pixel-wise uncertainties. Our data yield daily sea ice lead maps at a resolution of 1 km2 for the winter months November– April 2002/03–2018/19 (Arctic) and April–September 2003–2019 (Antarctic), respectively. The long-term average of the lead frequency distributions show distinct features related to bathymetric structures in both hemispheres. Text Antarc* Antarctic Arctic Sea ice MDPI Open Access Publishing Arctic Antarctic The Antarctic Remote Sensing 12 12 1957 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
sea ice leads MODIS Arctic Antarctic polar regions image processing fuzzy logic thermal infrared remote sensing |
spellingShingle |
sea ice leads MODIS Arctic Antarctic polar regions image processing fuzzy logic thermal infrared remote sensing Fabian Reiser Sascha Willmes Günther Heinemann A New Algorithm for Daily Sea Ice Lead Identification in the Arctic and Antarctic Winter from Thermal-Infrared Satellite Imagery |
topic_facet |
sea ice leads MODIS Arctic Antarctic polar regions image processing fuzzy logic thermal infrared remote sensing |
description |
The presence of sea ice leads in the sea ice cover represents a key feature in polar regions by controlling the heat exchange between the relatively warm ocean and cold atmosphere due to increased fluxes of turbulent sensible and latent heat. Sea ice leads contribute to the sea ice production and are sources for the formation of dense water which affects the ocean circulation. Atmospheric and ocean models strongly rely on observational data to describe the respective state of the sea ice since numerical models are not able to produce sea ice leads explicitly. For the Arctic, some lead datasets are available, but for the Antarctic, no such data yet exist. Our study presents a new algorithm with which leads are automatically identified in satellite thermal infrared images. A variety of lead metrics is used to distinguish between true leads and detection artefacts with the use of fuzzy logic. We evaluate the outputs and provide pixel-wise uncertainties. Our data yield daily sea ice lead maps at a resolution of 1 km2 for the winter months November– April 2002/03–2018/19 (Arctic) and April–September 2003–2019 (Antarctic), respectively. The long-term average of the lead frequency distributions show distinct features related to bathymetric structures in both hemispheres. |
format |
Text |
author |
Fabian Reiser Sascha Willmes Günther Heinemann |
author_facet |
Fabian Reiser Sascha Willmes Günther Heinemann |
author_sort |
Fabian Reiser |
title |
A New Algorithm for Daily Sea Ice Lead Identification in the Arctic and Antarctic Winter from Thermal-Infrared Satellite Imagery |
title_short |
A New Algorithm for Daily Sea Ice Lead Identification in the Arctic and Antarctic Winter from Thermal-Infrared Satellite Imagery |
title_full |
A New Algorithm for Daily Sea Ice Lead Identification in the Arctic and Antarctic Winter from Thermal-Infrared Satellite Imagery |
title_fullStr |
A New Algorithm for Daily Sea Ice Lead Identification in the Arctic and Antarctic Winter from Thermal-Infrared Satellite Imagery |
title_full_unstemmed |
A New Algorithm for Daily Sea Ice Lead Identification in the Arctic and Antarctic Winter from Thermal-Infrared Satellite Imagery |
title_sort |
new algorithm for daily sea ice lead identification in the arctic and antarctic winter from thermal-infrared satellite imagery |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2020 |
url |
https://doi.org/10.3390/rs12121957 |
op_coverage |
agris |
geographic |
Arctic Antarctic The Antarctic |
geographic_facet |
Arctic Antarctic The Antarctic |
genre |
Antarc* Antarctic Arctic Sea ice |
genre_facet |
Antarc* Antarctic Arctic Sea ice |
op_source |
Remote Sensing; Volume 12; Issue 12; Pages: 1957 |
op_relation |
https://dx.doi.org/10.3390/rs12121957 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/rs12121957 |
container_title |
Remote Sensing |
container_volume |
12 |
container_issue |
12 |
container_start_page |
1957 |
_version_ |
1774719482760003584 |