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Longterm monitoring of the glaciers in Wordie Bay, Antarctic Peninsula, using multi-mission SAR time series

Friedl, Peter and Seehaus, Thorsten and Wendt, Anja and Braun, Matthias (2017) Longterm monitoring of the glaciers in Wordie Bay, Antarctic Peninsula, using multi-mission SAR time series. 37th International Symposium on Remote Sensing of Environment (ISRSE-37), 9.-12- Mai 2017, Tshwane, Süd Afrika.

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Abstract

The Antarctic Peninsula is one of the world`s most affected regions by Climate Change. Dense and long time series of multi-mission SAR data enable detailed studies of the rapid glaciological changes in this area. We present results of a case study at the former Wordie Ice Shelf, located at the south-western side of the Antarctic Peninsula. Since the ice shelf disintegrated in a series of events starting in the 1970s, only disconnected tidewater glaciers have remained today. Due to the loss of the buttressing force of the ice shelf, the former tributary glaciers reacted with an acceleration of their flow speeds in order to adapt to the new boundary conditions. While the loss of the ice shelf itself does not affect sea level, the increased outflow of the glaciers and the associated mass loss contribute to global sea level rise. All former studies conducted at Wordie Bay so far covered only relatively short investigation periods. Hence it was not well known how long the process of adaption to the changing boundary conditions exactly lasts and how it is characterized in detail. We provide completest possible time series of glaciological parameters for the glaciers in Wordie Bay obtained from multi-mission SAR remote sensing data. For this purpose large datasets of previously active (e.g. ERS, Envisat, ALOS PALSAR, Radarsat-1) as well as currently recording SAR sensors (e.g. Sentinel-1, TerraSAR-X, TanDEM-X) were processed in an hpc environment and combined with data from other sources (e.g. optical images, airborne laser altimeter and ground penetrating radar data). The usage of large multi-mission SAR datasets allows us to obtain more dense time series of glacier monitoring measurements, which lead to a better understanding of the climate- and ocean-triggered glaciological processes in Wordie Bay. The high temporal resolution of our data reveals new insights into the glacier`s behavior after the disintegration of the former ice shelf. Therefore we are able to show that changes and adaption processes at Wordie Bay still go on. This is in contrast to the assumption of earlier publications which proposed that some of the glaciers in Wordie Bay may be approaching a new equilibrium.

Item URL in elib:https://elib.dlr.de/113520/
Document Type:Conference or Workshop Item (Speech)
Title:Longterm monitoring of the glaciers in Wordie Bay, Antarctic Peninsula, using multi-mission SAR time series
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Friedl, PeterPeter.Friedl (at) dlr.deUNSPECIFIED
Seehaus, Thorstenfriedrich-alexander universität (fau) erlangen-nürnbergUNSPECIFIED
Wendt, Anjabayerische akademie der wissenschaftenUNSPECIFIED
Braun, Matthiasfriedrich-alexander-universität erlangen-nürnberg, erlangen, germanyUNSPECIFIED
Date:May 2017
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Antarctic Peninsula, Ice Shelf, Glacier
Event Title:37th International Symposium on Remote Sensing of Environment (ISRSE-37)
Event Location:Tshwane, Süd Afrika
Event Type:international Conference
Event Dates:9.-12- Mai 2017
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Remote sensing and geoscience
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Land Surface
Deposited By: Friedl, Peter
Deposited On:28 Sep 2017 15:01
Last Modified:28 Sep 2017 15:01

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