Area and mass changes of Siachen Glacier (East Karakoram)
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Here, we present a comprehensive assessment of Siachen Glacier (East Karakoram), in terms of its area and elevation change, velocity variations and mass budget, utilizing different satellite datasets including Landsat, Hexagon, Cartosat-I, Shuttle Radar Topography Mission, Envisat Advanced Synthetic Aperture Radar and Japanese Advanced Land Observing Satellite Phased Array-type L-band SAR. The total areal extent of Siachen Glacier did not change significantly between 1980 and 2014; however the exposed-ice area decreased during that period. The terminus of the glacier has experienced substantial downwasting (on average 30 m) over the period of 1999-2007, followed by a retreat of the transition between exposed and debris-covered ice by a distance of 1.3 km during the short span 2007-14. The spatial patterns of the elevation difference and velocity are heterogeneous over the large areal extent of Siachen Glacier. The average velocity of the entire glacier, as computed between 11 December 2008 and 26 January 2009, was 12.3 ± 0.4 cm d -1 , while those estimated separately for the accumulation and ablation regions were 9.7 ± 0.4 cm d -1 and 20.4 ± 0.4 cm d -1 , respectively. The mass budget of Siachen Glacier is estimated to be -0.03 ± 0.21 m w.e. a -1 for the period of 1999-2007.
Agarwal , V , Bolch , T , Syed , T H , Pieczonka , T , Strozzi , T & Nagaich , R 2017 , ' Area and mass changes of Siachen Glacier (East Karakoram) ' , Journal of Glaciology , vol. 63 , no. 237 , pp. 148-163 . https://doi.org/10.1017/jog.2016.127
Journal of Glaciology
© The Author(s) 2016. This is an Open Access article, distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives licence (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is unaltered and is properly cited. The written permission of Cambridge University Press must be obtained for commercial re-use or in order to create a derivative work.
DescriptionThe authors thank the European Space Agency for providing the Envisat data under the AOE 668 project. T. Bolch and T. Strozzi acknowledge funding by the European Space Agency (ESA) within the Glaciers_cci project (code 4000109873/14/I-NB).
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