Surges of Harald Moltke Brae, north-western Greenland: seasonal modulation and initiation at the terminus ...
Harald Moltke Bræ, a marine-terminating glacier in north-western Greenland, shows episodic surges. A recent surge from 2013 to 2019 lasted significantly longer (6 years) than previously observed surges (2–4 years) and exhibits a pronounced seasonality with flow velocities varying by 1 order of magni...
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Online Access: | https://dx.doi.org/10.3929/ethz-b-000498832 http://hdl.handle.net/20.500.11850/498832 |
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ftdatacite:10.3929/ethz-b-000498832 2024-04-28T08:19:51+00:00 Surges of Harald Moltke Brae, north-western Greenland: seasonal modulation and initiation at the terminus ... Müller, Lukas Horwath, Martin Scheinert, Mirko Mayer, Christoph Ebermann, Benjamin Floricioiu, Dana Krieger, Lukas Rosenau, Ralf Vijay, Saurabh 2021 application/pdf https://dx.doi.org/10.3929/ethz-b-000498832 http://hdl.handle.net/20.500.11850/498832 en eng ETH Zurich info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 article-journal Text ScholarlyArticle Journal Article 2021 ftdatacite https://doi.org/10.3929/ethz-b-000498832 2024-04-02T12:34:54Z Harald Moltke Bræ, a marine-terminating glacier in north-western Greenland, shows episodic surges. A recent surge from 2013 to 2019 lasted significantly longer (6 years) than previously observed surges (2–4 years) and exhibits a pronounced seasonality with flow velocities varying by 1 order of magnitude (between about 0.5 and 10 m d−1) in the course of a year. During this 6-year period, the seasonal velocity always peaked in the early melt season and decreased abruptly when meltwater runoff was maximum. Our data suggest that the seasonality has been similar during previous surges. Furthermore, the analysis of satellite images and digital elevation models shows that the surge from 2013 to 2019 was preceded by a rapid frontal retreat and a pronounced thinning at the glacier front (30 m within 3 years). We discuss possible causal mechanisms of the seasonally modulated surge behaviour by examining various system-inherent factors (e.g. glacier geometry) and external factors (e.g. surface mass balance). The ... : The Cryosphere, 15 (7) ... Article in Journal/Newspaper glacier Greenland DataCite Metadata Store (German National Library of Science and Technology) |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
description |
Harald Moltke Bræ, a marine-terminating glacier in north-western Greenland, shows episodic surges. A recent surge from 2013 to 2019 lasted significantly longer (6 years) than previously observed surges (2–4 years) and exhibits a pronounced seasonality with flow velocities varying by 1 order of magnitude (between about 0.5 and 10 m d−1) in the course of a year. During this 6-year period, the seasonal velocity always peaked in the early melt season and decreased abruptly when meltwater runoff was maximum. Our data suggest that the seasonality has been similar during previous surges. Furthermore, the analysis of satellite images and digital elevation models shows that the surge from 2013 to 2019 was preceded by a rapid frontal retreat and a pronounced thinning at the glacier front (30 m within 3 years). We discuss possible causal mechanisms of the seasonally modulated surge behaviour by examining various system-inherent factors (e.g. glacier geometry) and external factors (e.g. surface mass balance). The ... : The Cryosphere, 15 (7) ... |
format |
Article in Journal/Newspaper |
author |
Müller, Lukas Horwath, Martin Scheinert, Mirko Mayer, Christoph Ebermann, Benjamin Floricioiu, Dana Krieger, Lukas Rosenau, Ralf Vijay, Saurabh |
spellingShingle |
Müller, Lukas Horwath, Martin Scheinert, Mirko Mayer, Christoph Ebermann, Benjamin Floricioiu, Dana Krieger, Lukas Rosenau, Ralf Vijay, Saurabh Surges of Harald Moltke Brae, north-western Greenland: seasonal modulation and initiation at the terminus ... |
author_facet |
Müller, Lukas Horwath, Martin Scheinert, Mirko Mayer, Christoph Ebermann, Benjamin Floricioiu, Dana Krieger, Lukas Rosenau, Ralf Vijay, Saurabh |
author_sort |
Müller, Lukas |
title |
Surges of Harald Moltke Brae, north-western Greenland: seasonal modulation and initiation at the terminus ... |
title_short |
Surges of Harald Moltke Brae, north-western Greenland: seasonal modulation and initiation at the terminus ... |
title_full |
Surges of Harald Moltke Brae, north-western Greenland: seasonal modulation and initiation at the terminus ... |
title_fullStr |
Surges of Harald Moltke Brae, north-western Greenland: seasonal modulation and initiation at the terminus ... |
title_full_unstemmed |
Surges of Harald Moltke Brae, north-western Greenland: seasonal modulation and initiation at the terminus ... |
title_sort |
surges of harald moltke brae, north-western greenland: seasonal modulation and initiation at the terminus ... |
publisher |
ETH Zurich |
publishDate |
2021 |
url |
https://dx.doi.org/10.3929/ethz-b-000498832 http://hdl.handle.net/20.500.11850/498832 |
genre |
glacier Greenland |
genre_facet |
glacier Greenland |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_doi |
https://doi.org/10.3929/ethz-b-000498832 |
_version_ |
1797583115939479552 |