Combination of TerraSAR-X and Time-Lapse Photography for Snow on Sea-Ice Monitoring in Deception Bay, Nunavik

Monitoring sea ice in Deception Bay (Nunavik, Hudson Strait) is not only relevant for local community members who rely on the fjord's rich ecosystem for subsistence in a context of a changing climate - lessons learned from this work have the potential to be applied in similar contexts elsewhere...

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Main Authors: Dufour-Beauséjour, Sophie, Wendleder, Anna, Bernier, Monique, Poulin, Jimmy, Gilbert, Veronique, Tuniq, Juupi, Gauthier, Yves, Rouleau, Amélie
Format: Conference Object
Language:unknown
Published: 2019
Subjects:
Online Access:https://elib.dlr.de/130010/
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spelling ftdlr:oai:elib.dlr.de:130010 2024-05-19T07:41:44+00:00 Combination of TerraSAR-X and Time-Lapse Photography for Snow on Sea-Ice Monitoring in Deception Bay, Nunavik Dufour-Beauséjour, Sophie Wendleder, Anna Bernier, Monique Poulin, Jimmy Gilbert, Veronique Tuniq, Juupi Gauthier, Yves Rouleau, Amélie 2019 https://elib.dlr.de/130010/ unknown Dufour-Beauséjour, Sophie und Wendleder, Anna und Bernier, Monique und Poulin, Jimmy und Gilbert, Veronique und Tuniq, Juupi und Gauthier, Yves und Rouleau, Amélie (2019) Combination of TerraSAR-X and Time-Lapse Photography for Snow on Sea-Ice Monitoring in Deception Bay, Nunavik. TerraSAR-X/TanDEM-X Science Meeting, 2019-10-21 - 2019-10-24, Oberpfaffenhofen, Germany. Dynamik der Landoberfläche Konferenzbeitrag NonPeerReviewed 2019 ftdlr 2024-04-25T00:51:33Z Monitoring sea ice in Deception Bay (Nunavik, Hudson Strait) is not only relevant for local community members who rely on the fjord's rich ecosystem for subsistence in a context of a changing climate - lessons learned from this work have the potential to be applied in similar contexts elsewhere in Inuit Nunangat, and by other researchers studying the cryosphere. This work is part of the Safe Passage (Polar Knowledge Canada) project. In this study, we monitored snow-covered sea ice from freeze-up to break-up for three seasons of ice, combining three continuous time-series from frequent-revisit X-band SAR, hourly time-lapse photography, and air temperature measurements, from 2015 to 2018. TerraSAR-X high-resolution images have been acquired in three orbits (each every 11 days) since December 2015 and processed at DLR using the Multi-SAR System. Time-lapse cameras have been taking hourly pictures of the bay for the same period as well as measuring day time air temperature. This presentation will report on two contributions from TerraSAR-X data used in the study: 1) time-series which reproduce the SAR seasonal evolution for backscattering from snow-covered first-year sea ice already documented for the C-band, and 2) new observations for X-band backscattering over young ice types like grease ice, nilas, pancake ice, and grey-white ice. Seasonal features of the VV backscattering include a post-freeze-up peak, a monotone winter period with a slight negative trend, and a spring peak. The descending/morning and ascending/evening orbits were shown to behave differently in two periods: median winterly values and spring peak 2016. We propose that these differences in behavior are linked either to acquisition geometry (ascending or descending) or to acquisition time (evening or morning). This project is a collaboration with the Kativik Regional Government and is supported by Polar Knowledge Canada and the Raglan Mine. Conference Object Hudson Strait inuit Sea ice Nunavik German Aerospace Center: elib - DLR electronic library
institution Open Polar
collection German Aerospace Center: elib - DLR electronic library
op_collection_id ftdlr
language unknown
topic Dynamik der Landoberfläche
spellingShingle Dynamik der Landoberfläche
Dufour-Beauséjour, Sophie
Wendleder, Anna
Bernier, Monique
Poulin, Jimmy
Gilbert, Veronique
Tuniq, Juupi
Gauthier, Yves
Rouleau, Amélie
Combination of TerraSAR-X and Time-Lapse Photography for Snow on Sea-Ice Monitoring in Deception Bay, Nunavik
topic_facet Dynamik der Landoberfläche
description Monitoring sea ice in Deception Bay (Nunavik, Hudson Strait) is not only relevant for local community members who rely on the fjord's rich ecosystem for subsistence in a context of a changing climate - lessons learned from this work have the potential to be applied in similar contexts elsewhere in Inuit Nunangat, and by other researchers studying the cryosphere. This work is part of the Safe Passage (Polar Knowledge Canada) project. In this study, we monitored snow-covered sea ice from freeze-up to break-up for three seasons of ice, combining three continuous time-series from frequent-revisit X-band SAR, hourly time-lapse photography, and air temperature measurements, from 2015 to 2018. TerraSAR-X high-resolution images have been acquired in three orbits (each every 11 days) since December 2015 and processed at DLR using the Multi-SAR System. Time-lapse cameras have been taking hourly pictures of the bay for the same period as well as measuring day time air temperature. This presentation will report on two contributions from TerraSAR-X data used in the study: 1) time-series which reproduce the SAR seasonal evolution for backscattering from snow-covered first-year sea ice already documented for the C-band, and 2) new observations for X-band backscattering over young ice types like grease ice, nilas, pancake ice, and grey-white ice. Seasonal features of the VV backscattering include a post-freeze-up peak, a monotone winter period with a slight negative trend, and a spring peak. The descending/morning and ascending/evening orbits were shown to behave differently in two periods: median winterly values and spring peak 2016. We propose that these differences in behavior are linked either to acquisition geometry (ascending or descending) or to acquisition time (evening or morning). This project is a collaboration with the Kativik Regional Government and is supported by Polar Knowledge Canada and the Raglan Mine.
format Conference Object
author Dufour-Beauséjour, Sophie
Wendleder, Anna
Bernier, Monique
Poulin, Jimmy
Gilbert, Veronique
Tuniq, Juupi
Gauthier, Yves
Rouleau, Amélie
author_facet Dufour-Beauséjour, Sophie
Wendleder, Anna
Bernier, Monique
Poulin, Jimmy
Gilbert, Veronique
Tuniq, Juupi
Gauthier, Yves
Rouleau, Amélie
author_sort Dufour-Beauséjour, Sophie
title Combination of TerraSAR-X and Time-Lapse Photography for Snow on Sea-Ice Monitoring in Deception Bay, Nunavik
title_short Combination of TerraSAR-X and Time-Lapse Photography for Snow on Sea-Ice Monitoring in Deception Bay, Nunavik
title_full Combination of TerraSAR-X and Time-Lapse Photography for Snow on Sea-Ice Monitoring in Deception Bay, Nunavik
title_fullStr Combination of TerraSAR-X and Time-Lapse Photography for Snow on Sea-Ice Monitoring in Deception Bay, Nunavik
title_full_unstemmed Combination of TerraSAR-X and Time-Lapse Photography for Snow on Sea-Ice Monitoring in Deception Bay, Nunavik
title_sort combination of terrasar-x and time-lapse photography for snow on sea-ice monitoring in deception bay, nunavik
publishDate 2019
url https://elib.dlr.de/130010/
genre Hudson Strait
inuit
Sea ice
Nunavik
genre_facet Hudson Strait
inuit
Sea ice
Nunavik
op_relation Dufour-Beauséjour, Sophie und Wendleder, Anna und Bernier, Monique und Poulin, Jimmy und Gilbert, Veronique und Tuniq, Juupi und Gauthier, Yves und Rouleau, Amélie (2019) Combination of TerraSAR-X and Time-Lapse Photography for Snow on Sea-Ice Monitoring in Deception Bay, Nunavik. TerraSAR-X/TanDEM-X Science Meeting, 2019-10-21 - 2019-10-24, Oberpfaffenhofen, Germany.
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