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Elevation change of Fedchenko Glacier, Pamir Mountains, from GNSS field measurements and TanDEM-X elevation models, with a focus on the upper glacier

Lambrecht, Astrid and Mayer, Christoph and Wendt, Anja and Floricioiu, Dana and Völksen, Christof (2018) Elevation change of Fedchenko Glacier, Pamir Mountains, from GNSS field measurements and TanDEM-X elevation models, with a focus on the upper glacier. Journal of Glaciology, 64 (246), pp. 637-648. Cambridge University Press. DOI: 10.1017/jog.2018.52 ISSN 0022-1430

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Official URL: http://dx.doi.org/10.1017/jog.2018.52

Abstract

Fedchenko Glacier experienced a large thickness loss since the first scientific investigations in 1928. As the largest glacier in the Pamir Mountains, this glacier plays an important role for the regional glacier mass budget. We use a series of Global Navigation Satellite Systems (GNSS) observations from 2009 to 2016 and TanDEM-X elevation models from 2011 to 2016 to investigate recent elevation changes. Accounting for radar wave penetration minimizes biases in elevation that can otherwise reach up to 6 m in dry snow on Fedchenko Glacier, with mean values of 3-4 m in the high accumulation regions. The Seasonal elevation changes reach up to ±5 m. The glacier surface elevation decreased along its entire length over multi-year periods. Thinning rates increased between 2000 and 2016 by a factor of 1.8 compared to 1928 to 2000, resulting in peak values of 1.5 m a-1. Even the highest accumulation basins above 5000 m elevation have been affected by glacier thinning with change rates between -0.2 and -0.4 m a-1 from 2009 to 2016. The estimated glacierwide mass balance rates are -0.27 ± 0.05 m w.e. a-1 for 2000 to 2011 and -0.51 ± 0.04 m w.e. a-1 between 2011 and 2016.

Item URL in elib:https://elib.dlr.de/120668/
Document Type:Article
Title:Elevation change of Fedchenko Glacier, Pamir Mountains, from GNSS field measurements and TanDEM-X elevation models, with a focus on the upper glacier
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Lambrecht, Astridastrid.lambrecht (at) keg.badw.deUNSPECIFIED
Mayer, ChristophBay. Akademie der Wissenschaftenhttps://orcid.org/0000-0002-4226-4608
Wendt, AnjaBayerische Akademie der WissenschaftenUNSPECIFIED
Floricioiu, DanaDana.Floricioiu (at) dlr.dehttps://orcid.org/0000-0002-1647-7191
Völksen, ChristofBay. Akademie der WissenschaftenUNSPECIFIED
Date:22 June 2018
Journal or Publication Title:Journal of Glaciology
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:64
DOI :10.1017/jog.2018.52
Page Range:pp. 637-648
Publisher:Cambridge University Press
ISSN:0022-1430
Status:Published
Keywords:Applied glaciology, Glacier fluctuations, Glacier monitoring, Mountain glaciers, Remote sensing
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 - SAR-Methodology
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > SAR Signal Processing
Deposited By: Floricioiu, Dr. Dana
Deposited On:26 Jun 2018 13:45
Last Modified:30 Nov 2018 12:38

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