Sea ice leads detection using SARAL/AltiKa altimeter
Sea ice leads play an essential role in ocean-ice-atmosphere exchange, in ocean circulation, geochemistry, and in ice dynamics. Their precise detection is crucial for altimetric estimations of sea ice thickness and volume. This study evaluates the performance of the SARAL/AltiKa (Satellite with ARgo...
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ftneicon:oai:rour.neicon.ru:rour/306943 2023-05-15T18:16:36+02:00 Sea ice leads detection using SARAL/AltiKa altimeter Zakharova, Elena A. Guerreiro, Kevin Willmes, Sascha Rémy, Frédérique Kouraev, Alexei V. Heinemann, Günther Fleury, Sara 2015 https://doi.org/10.1080/01490419.2015.1019655 https://openrepository.ru/article?id=306943 eng eng vtls:000578413 doi:10.1080/01490419.2015.1019655 https://openrepository.ru/article?id=306943 Marine geodesy. 2015. Vol. 38, supplement 1. P. 522-533 морской лед альтиметры дистанционное зондирование статьи в журналах info:eu-repo/semantics/article 2015 ftneicon https://doi.org/10.1080/01490419.2015.1019655 2020-07-21T12:35:35Z Sea ice leads play an essential role in ocean-ice-atmosphere exchange, in ocean circulation, geochemistry, and in ice dynamics. Their precise detection is crucial for altimetric estimations of sea ice thickness and volume. This study evaluates the performance of the SARAL/AltiKa (Satellite with ARgos and ALtiKa) altimeter to detect leads and to monitor their spatio-temporal dynamics. We show that a pulse peakiness parameter (PP) used to detect leads by Envisat RA-2 and ERS-1,-2 altimeters is not suitable because of saturation of AltiKa return echoes over the leads. The signal saturation results in loss of 6–10% of PP data over sea ice. We propose a different parameter—maximal power of waveform—and define the threshold to discriminate the leads. Our algorithm can be applied from December until May. It detects well the leads of small and medium size from 200 m to 3–4 km. So the combination of the high-resolution altimetric estimates with low-resolution thermal infra-red or radiometric lead fraction products could enhance the capability of remote sensing to monitor sea ice fracturing. Article in Journal/Newspaper Sea ice NORA (National aggregator of open repositories of Russian universities) Marine Geodesy 38 sup1 522 533 |
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Open Polar |
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NORA (National aggregator of open repositories of Russian universities) |
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ftneicon |
language |
English |
topic |
морской лед альтиметры дистанционное зондирование |
spellingShingle |
морской лед альтиметры дистанционное зондирование Zakharova, Elena A. Guerreiro, Kevin Willmes, Sascha Rémy, Frédérique Kouraev, Alexei V. Heinemann, Günther Fleury, Sara Sea ice leads detection using SARAL/AltiKa altimeter |
topic_facet |
морской лед альтиметры дистанционное зондирование |
description |
Sea ice leads play an essential role in ocean-ice-atmosphere exchange, in ocean circulation, geochemistry, and in ice dynamics. Their precise detection is crucial for altimetric estimations of sea ice thickness and volume. This study evaluates the performance of the SARAL/AltiKa (Satellite with ARgos and ALtiKa) altimeter to detect leads and to monitor their spatio-temporal dynamics. We show that a pulse peakiness parameter (PP) used to detect leads by Envisat RA-2 and ERS-1,-2 altimeters is not suitable because of saturation of AltiKa return echoes over the leads. The signal saturation results in loss of 6–10% of PP data over sea ice. We propose a different parameter—maximal power of waveform—and define the threshold to discriminate the leads. Our algorithm can be applied from December until May. It detects well the leads of small and medium size from 200 m to 3–4 km. So the combination of the high-resolution altimetric estimates with low-resolution thermal infra-red or radiometric lead fraction products could enhance the capability of remote sensing to monitor sea ice fracturing. |
format |
Article in Journal/Newspaper |
author |
Zakharova, Elena A. Guerreiro, Kevin Willmes, Sascha Rémy, Frédérique Kouraev, Alexei V. Heinemann, Günther Fleury, Sara |
author_facet |
Zakharova, Elena A. Guerreiro, Kevin Willmes, Sascha Rémy, Frédérique Kouraev, Alexei V. Heinemann, Günther Fleury, Sara |
author_sort |
Zakharova, Elena A. |
title |
Sea ice leads detection using SARAL/AltiKa altimeter |
title_short |
Sea ice leads detection using SARAL/AltiKa altimeter |
title_full |
Sea ice leads detection using SARAL/AltiKa altimeter |
title_fullStr |
Sea ice leads detection using SARAL/AltiKa altimeter |
title_full_unstemmed |
Sea ice leads detection using SARAL/AltiKa altimeter |
title_sort |
sea ice leads detection using saral/altika altimeter |
publishDate |
2015 |
url |
https://doi.org/10.1080/01490419.2015.1019655 https://openrepository.ru/article?id=306943 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
Marine geodesy. 2015. Vol. 38, supplement 1. P. 522-533 |
op_relation |
vtls:000578413 doi:10.1080/01490419.2015.1019655 https://openrepository.ru/article?id=306943 |
op_doi |
https://doi.org/10.1080/01490419.2015.1019655 |
container_title |
Marine Geodesy |
container_volume |
38 |
container_issue |
sup1 |
container_start_page |
522 |
op_container_end_page |
533 |
_version_ |
1766190333073293312 |