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Local surface mass-balance reconstruction from a tephra layer – a case study on the northern slope of Mýrdalsjökull, Iceland

Mayer, Christoph and Jaenicke, Julia and Lambrecht, Astrid and Braun, Ludwig and Völksen, Christof and Minet, Christian and Münzer, Ulrich (2016) Local surface mass-balance reconstruction from a tephra layer – a case study on the northern slope of Mýrdalsjökull, Iceland. Journal of Glaciology, 235, pp. 1-9. Cambridge University Press. doi: 10.1017/jog.2016.119. ISSN 0022-1430.

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Official URL: https://www.cambridge.org/core/journals/journal-of-glaciology

Abstract

Most Icelandic glaciers show high-accumulation rates during winter and strong surface melting during summer. Although it is difficult to establish and maintain mass-balance programs on these glaciers, mass-balance series do exist for several of the ice caps (Björnsson and others, 2013). We make use of the frequent volcanic eruptions in Iceland, which cause widespread internal tephra layers in the ice caps, to reconstruct the surface mass balance (SMB) in the ablation zone. This method requires information about surface geometry and ice velocity, derived from remote-sensing information. In addition, the emergence angle of the tephra layer needs to be known. As a proof-of-concept, we utilize a prominent tephra layer of the Mýrdalsjökull Ice Cap to infer local SMB estimates in the ablation area back to 1988. Using tephra-layer outcrop locations across the glacier at different points in time it is possible to determine local mass changes (loss and redistribution) for a large part of the ablation zone, without the use of historic elevation models, which often are not available.

Item URL in elib:https://elib.dlr.de/107440/
Document Type:Article
Title:Local surface mass-balance reconstruction from a tephra layer – a case study on the northern slope of Mýrdalsjökull, Iceland
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Mayer, ChristophBay. Akademie der WissenschaftenUNSPECIFIED
Jaenicke, JuliaLMU MünchenUNSPECIFIED
Lambrecht, AstridBay. Akademie der WissenschaftenUNSPECIFIED
Braun, LudwigBay. Akademie der WissenschaftenUNSPECIFIED
Völksen, ChristofBay. Akademie der WissenschaftenUNSPECIFIED
Minet, ChristianChristian.Minet (at) dlr.deUNSPECIFIED
Münzer, UlrichLMU MünchenUNSPECIFIED
Date:20 October 2016
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:235
DOI :10.1017/jog.2016.119
Page Range:pp. 1-9
Publisher:Cambridge University Press
ISSN:0022-1430
Status:Published
Keywords:Icelandic ice caps, mass balance, 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 - Earth Observation
DLR - Research theme (Project):R - Vorhaben hochauflösende Fernerkundungsverfahren (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > SAR Signal Processing
Deposited By: Minet, Christian
Deposited On:08 Nov 2016 16:29
Last Modified:01 Apr 2017 05:02

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