A Study of Sea Ice Topography in the Weddell and Ross Seas Using Dual Polarimetric TanDEM-X Imagery
The sea ice topography is essential for understanding the interactions within the air-ocean-ice system. Single-pass interferometric synthetic aperture radar (InSAR) allows for the generation of digital elevation model (DEM) over the drift sea ice. However, accurate sea ice DEMs (i.e., snow freeboard...
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Copernicus Publications
2024
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00070950 2024-02-11T09:56:44+01:00 A Study of Sea Ice Topography in the Weddell and Ross Seas Using Dual Polarimetric TanDEM-X Imagery Huang, Lanqing Hajnsek, Irena 2024-01 electronic https://doi.org/10.5194/egusphere-2023-2954 https://noa.gwlb.de/receive/cop_mods_00070950 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069274/egusphere-2023-2954.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2023-2954/egusphere-2023-2954.pdf eng eng Copernicus Publications https://doi.org/10.5194/egusphere-2023-2954 https://noa.gwlb.de/receive/cop_mods_00070950 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069274/egusphere-2023-2954.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2023-2954/egusphere-2023-2954.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2024 ftnonlinearchiv https://doi.org/10.5194/egusphere-2023-2954 2024-01-15T00:22:44Z The sea ice topography is essential for understanding the interactions within the air-ocean-ice system. Single-pass interferometric synthetic aperture radar (InSAR) allows for the generation of digital elevation model (DEM) over the drift sea ice. However, accurate sea ice DEMs (i.e., snow freeboard) derived from InSAR are impeded due to the radar signals penetrating the snow and ice layers. This research introduces a novel methodology for retrieving sea ice DEMs using dual-polarization interferometric SAR images, considering the variation in radar penetration bias across multiple ice types. The accuracy of the method is verified through photogrammetric measurements, demonstrating the derived DEM with a root-mean-square error of 0.26 m over a 200 x 19 km area. The method is further applied to broader regions in the Weddell and the Ross Sea, offering new insights into the regional variations of sea ice topography in the Antarctic. We also characterize the non-Gaussian statistical behavior of sea ice elevations using log-normal and exponential-normal distributions. The results suggest that the exponential-normal distribution is superior in the thicker sea ice region (average elevation >0.5 m, whereas the two distributions exhibit similar performance in the thinner ice region (average elevation <0.5 m). These findings offer an in-depth representation of sea ice elevation and roughness in the Weddell and Ross Sea, which can be conducted in time series data to comprehend sea ice dynamics, including its growth and deformation. Article in Journal/Newspaper Antarc* Antarctic Ross Sea Sea ice Niedersächsisches Online-Archiv NOA Antarctic Ross Sea The Antarctic Weddell |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Huang, Lanqing Hajnsek, Irena A Study of Sea Ice Topography in the Weddell and Ross Seas Using Dual Polarimetric TanDEM-X Imagery |
topic_facet |
article Verlagsveröffentlichung |
description |
The sea ice topography is essential for understanding the interactions within the air-ocean-ice system. Single-pass interferometric synthetic aperture radar (InSAR) allows for the generation of digital elevation model (DEM) over the drift sea ice. However, accurate sea ice DEMs (i.e., snow freeboard) derived from InSAR are impeded due to the radar signals penetrating the snow and ice layers. This research introduces a novel methodology for retrieving sea ice DEMs using dual-polarization interferometric SAR images, considering the variation in radar penetration bias across multiple ice types. The accuracy of the method is verified through photogrammetric measurements, demonstrating the derived DEM with a root-mean-square error of 0.26 m over a 200 x 19 km area. The method is further applied to broader regions in the Weddell and the Ross Sea, offering new insights into the regional variations of sea ice topography in the Antarctic. We also characterize the non-Gaussian statistical behavior of sea ice elevations using log-normal and exponential-normal distributions. The results suggest that the exponential-normal distribution is superior in the thicker sea ice region (average elevation >0.5 m, whereas the two distributions exhibit similar performance in the thinner ice region (average elevation <0.5 m). These findings offer an in-depth representation of sea ice elevation and roughness in the Weddell and Ross Sea, which can be conducted in time series data to comprehend sea ice dynamics, including its growth and deformation. |
format |
Article in Journal/Newspaper |
author |
Huang, Lanqing Hajnsek, Irena |
author_facet |
Huang, Lanqing Hajnsek, Irena |
author_sort |
Huang, Lanqing |
title |
A Study of Sea Ice Topography in the Weddell and Ross Seas Using Dual Polarimetric TanDEM-X Imagery |
title_short |
A Study of Sea Ice Topography in the Weddell and Ross Seas Using Dual Polarimetric TanDEM-X Imagery |
title_full |
A Study of Sea Ice Topography in the Weddell and Ross Seas Using Dual Polarimetric TanDEM-X Imagery |
title_fullStr |
A Study of Sea Ice Topography in the Weddell and Ross Seas Using Dual Polarimetric TanDEM-X Imagery |
title_full_unstemmed |
A Study of Sea Ice Topography in the Weddell and Ross Seas Using Dual Polarimetric TanDEM-X Imagery |
title_sort |
study of sea ice topography in the weddell and ross seas using dual polarimetric tandem-x imagery |
publisher |
Copernicus Publications |
publishDate |
2024 |
url |
https://doi.org/10.5194/egusphere-2023-2954 https://noa.gwlb.de/receive/cop_mods_00070950 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069274/egusphere-2023-2954.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2023-2954/egusphere-2023-2954.pdf |
geographic |
Antarctic Ross Sea The Antarctic Weddell |
geographic_facet |
Antarctic Ross Sea The Antarctic Weddell |
genre |
Antarc* Antarctic Ross Sea Sea ice |
genre_facet |
Antarc* Antarctic Ross Sea Sea ice |
op_relation |
https://doi.org/10.5194/egusphere-2023-2954 https://noa.gwlb.de/receive/cop_mods_00070950 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069274/egusphere-2023-2954.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2023-2954/egusphere-2023-2954.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/egusphere-2023-2954 |
_version_ |
1790605504623411200 |