Article (Scientific journals)
Spatial and temporal variability of Glacier surface velocities and outlet areas on James Ross island, northern Antarctic Peninsula
Lippl, Stefan; Friedl, Peter; Kittel, Christoph et al.
2019In Geosciences
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Keywords :
James Ross Island; Antarctic Peninsula; glacier area changes; glacier velocities
Abstract :
[en] The northern Antarctic Peninsula was affected by a significant warming over the second half of the 20th century and the collapse of several ice shelves. Local climate conditions on James Ross Island on the northeastern coast can differ strongly from the main part of the Antarctic Peninsula. This paper reports the spatial and temporal variability of glacier surface velocities and the area of their outlets throughout James Ross Island, and evaluates potential relationships with atmospheric and oceanic conditions. Velocity estimates were retrieved from intensity feature tracking of scenes from satellite synthetic aperture radar sensors TerraSAR-X and TanDEM-X between 2014 and 2018, which were validated against ground observations. Calving front positions back to 1945 were used to calculate outlet area changes for the glaciers by using a common-box approach. The annual recession rates of almost all investigated glacier calving fronts decelerated for the time periods 2009–2014 and 2014–2018 in comparison to the period 1988–2009, but their velocity patterns differed. Analysis of atmospheric conditions failed to explain the different patterns in velocity and area changes. We suggest a strong influence from local bathymetric conditions. Future investigations of the oceanic conditions would be necessary for a profound understanding of the super-position of different influencing factors.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Lippl, Stefan
Friedl, Peter
Kittel, Christoph  ;  Université de Liège - ULiège > Département de géographie > Climatologie et Topoclimatologie
Marinsek, Sebastián
Seehaus, Thorsten C.
Braun, Matthias H.
Language :
English
Title :
Spatial and temporal variability of Glacier surface velocities and outlet areas on James Ross island, northern Antarctic Peninsula
Publication date :
28 August 2019
Journal title :
Geosciences
eISSN :
2076-3263
Publisher :
MDPI Open Access Publishing, Basel, Switzerland
Peer reviewed :
Peer Reviewed verified by ORBi
Tags :
CÉCI : Consortium des Équipements de Calcul Intensif
Funders :
CÉCI - Consortium des Équipements de Calcul Intensif [BE]
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
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