12 Years of Area Variation by the Drygalski Ice Tongue as Measured With COSMO-SkyMed
One important coastal polynya around Antarctica is Terra Nova Bay (TNB) polynya. Its formation and persistence are due to the combined effect of katabatic winds, regional ice conditions, and the Drygalski Ice Tongue (DIT). The combined effect of these elements arranges a delicate balance in TNB. To...
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ftdoajarticles:oai:doaj.org/article:a00a82887b5c4aacac5d09c37985ddd9 2023-05-15T14:04:25+02:00 12 Years of Area Variation by the Drygalski Ice Tongue as Measured With COSMO-SkyMed Miguel Moctezuma-Flores Flavio Parmiggiani Lorenzo Guerrieri 2022-01-01T00:00:00Z https://doi.org/10.1109/JSTARS.2022.3205560 https://doaj.org/article/a00a82887b5c4aacac5d09c37985ddd9 EN eng IEEE https://ieeexplore.ieee.org/document/9882966/ https://doaj.org/toc/2151-1535 2151-1535 doi:10.1109/JSTARS.2022.3205560 https://doaj.org/article/a00a82887b5c4aacac5d09c37985ddd9 IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 15, Pp 7839-7845 (2022) Ice image segmentation remote sensing synthetic aperture imaging Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809 article 2022 ftdoajarticles https://doi.org/10.1109/JSTARS.2022.3205560 2022-12-30T20:54:13Z One important coastal polynya around Antarctica is Terra Nova Bay (TNB) polynya. Its formation and persistence are due to the combined effect of katabatic winds, regional ice conditions, and the Drygalski Ice Tongue (DIT). The combined effect of these elements arranges a delicate balance in TNB. To evaluate the interacting elements, we focused our attention on the DIT, one of the largest ice tongues in Antarctica. The DIT is a 70-km long tongue, which juts out like a pier from the icy land into northern McMurdo Sound of Antarctica's Ross Dependency. The analysis presented in this article was carried out using Cosmo-SkyMed (CSK) images. The methodology developed for the analysis consists of three steps: 1) DIT shape enhancement, 2) fuzzy Bayesian segmentation which associates the analyzed set of pixels with a binary label field, and 3) parametric representation of the shape of the DIT to compare the area of the ice tongue as it was 12 years ago and as it is today. The computed mean value of the DIT surface velocity was 703 m y $^{-1}$ . To estimate the closeness of the derived parameter to the true value, using a statistical approach, the 95% confidence interval for the true mean value is 703 $\pm$ 4.236 m y $^{-1}$ . Our analysis confirms a trend of advance. That is, after the significant calving events of the tongue in 2005 and 2006, the DIT has resumed its normal growth, and its length has increased by 12% in the last 12 years. Article in Journal/Newspaper Antarc* Antarctica McMurdo Sound Ross Dependency Directory of Open Access Journals: DOAJ Articles Drygalski ENVELOPE(-61.000,-61.000,-64.717,-64.717) Drygalski Ice Tongue ENVELOPE(163.500,163.500,-75.400,-75.400) McMurdo Sound Ross Dependency ENVELOPE(160.000,160.000,-60.000,-60.000) Terra Nova Bay IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 15 7839 7845 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ice image segmentation remote sensing synthetic aperture imaging Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Ice image segmentation remote sensing synthetic aperture imaging Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809 Miguel Moctezuma-Flores Flavio Parmiggiani Lorenzo Guerrieri 12 Years of Area Variation by the Drygalski Ice Tongue as Measured With COSMO-SkyMed |
topic_facet |
Ice image segmentation remote sensing synthetic aperture imaging Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809 |
description |
One important coastal polynya around Antarctica is Terra Nova Bay (TNB) polynya. Its formation and persistence are due to the combined effect of katabatic winds, regional ice conditions, and the Drygalski Ice Tongue (DIT). The combined effect of these elements arranges a delicate balance in TNB. To evaluate the interacting elements, we focused our attention on the DIT, one of the largest ice tongues in Antarctica. The DIT is a 70-km long tongue, which juts out like a pier from the icy land into northern McMurdo Sound of Antarctica's Ross Dependency. The analysis presented in this article was carried out using Cosmo-SkyMed (CSK) images. The methodology developed for the analysis consists of three steps: 1) DIT shape enhancement, 2) fuzzy Bayesian segmentation which associates the analyzed set of pixels with a binary label field, and 3) parametric representation of the shape of the DIT to compare the area of the ice tongue as it was 12 years ago and as it is today. The computed mean value of the DIT surface velocity was 703 m y $^{-1}$ . To estimate the closeness of the derived parameter to the true value, using a statistical approach, the 95% confidence interval for the true mean value is 703 $\pm$ 4.236 m y $^{-1}$ . Our analysis confirms a trend of advance. That is, after the significant calving events of the tongue in 2005 and 2006, the DIT has resumed its normal growth, and its length has increased by 12% in the last 12 years. |
format |
Article in Journal/Newspaper |
author |
Miguel Moctezuma-Flores Flavio Parmiggiani Lorenzo Guerrieri |
author_facet |
Miguel Moctezuma-Flores Flavio Parmiggiani Lorenzo Guerrieri |
author_sort |
Miguel Moctezuma-Flores |
title |
12 Years of Area Variation by the Drygalski Ice Tongue as Measured With COSMO-SkyMed |
title_short |
12 Years of Area Variation by the Drygalski Ice Tongue as Measured With COSMO-SkyMed |
title_full |
12 Years of Area Variation by the Drygalski Ice Tongue as Measured With COSMO-SkyMed |
title_fullStr |
12 Years of Area Variation by the Drygalski Ice Tongue as Measured With COSMO-SkyMed |
title_full_unstemmed |
12 Years of Area Variation by the Drygalski Ice Tongue as Measured With COSMO-SkyMed |
title_sort |
12 years of area variation by the drygalski ice tongue as measured with cosmo-skymed |
publisher |
IEEE |
publishDate |
2022 |
url |
https://doi.org/10.1109/JSTARS.2022.3205560 https://doaj.org/article/a00a82887b5c4aacac5d09c37985ddd9 |
long_lat |
ENVELOPE(-61.000,-61.000,-64.717,-64.717) ENVELOPE(163.500,163.500,-75.400,-75.400) ENVELOPE(160.000,160.000,-60.000,-60.000) |
geographic |
Drygalski Drygalski Ice Tongue McMurdo Sound Ross Dependency Terra Nova Bay |
geographic_facet |
Drygalski Drygalski Ice Tongue McMurdo Sound Ross Dependency Terra Nova Bay |
genre |
Antarc* Antarctica McMurdo Sound Ross Dependency |
genre_facet |
Antarc* Antarctica McMurdo Sound Ross Dependency |
op_source |
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 15, Pp 7839-7845 (2022) |
op_relation |
https://ieeexplore.ieee.org/document/9882966/ https://doaj.org/toc/2151-1535 2151-1535 doi:10.1109/JSTARS.2022.3205560 https://doaj.org/article/a00a82887b5c4aacac5d09c37985ddd9 |
op_doi |
https://doi.org/10.1109/JSTARS.2022.3205560 |
container_title |
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
container_volume |
15 |
container_start_page |
7839 |
op_container_end_page |
7845 |
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1766275509591736320 |