Sub-seasonal thaw slump mass wasting is not consistently energy limited at the landscape scale
Predicting future thaw slump activity requires a sound understanding of the atmospheric drivers and geomorphic controls on mass wasting across a range of timescales. On sub-seasonal timescales, sparse measurements indicate that mass wasting at active slumps is often limited by the energy available f...
Published in: | The Cryosphere |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Copernicus Publications
2018
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00007312 2023-05-15T18:32:32+02:00 Sub-seasonal thaw slump mass wasting is not consistently energy limited at the landscape scale Zwieback, Simon Kokelj, Steven V. Günther, Frank Boike, Julia Grosse, Guido Hajnsek, Irena 2018-02 electronic https://doi.org/10.5194/tc-12-549-2018 https://noa.gwlb.de/receive/cop_mods_00007312 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00007269/tc-12-549-2018.pdf https://tc.copernicus.org/articles/12/549/2018/tc-12-549-2018.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-12-549-2018 https://noa.gwlb.de/receive/cop_mods_00007312 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00007269/tc-12-549-2018.pdf https://tc.copernicus.org/articles/12/549/2018/tc-12-549-2018.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2018 ftnonlinearchiv https://doi.org/10.5194/tc-12-549-2018 2022-02-08T22:58:34Z Predicting future thaw slump activity requires a sound understanding of the atmospheric drivers and geomorphic controls on mass wasting across a range of timescales. On sub-seasonal timescales, sparse measurements indicate that mass wasting at active slumps is often limited by the energy available for melting ground ice, but other factors such as rainfall or the formation of an insulating veneer may also be relevant. To study the sub-seasonal drivers, we derive topographic changes from single-pass radar interferometric data acquired by the TanDEM-X satellites. The estimated elevation changes at 12 m resolution complement the commonly observed planimetric retreat rates by providing information on volume losses. Their high vertical precision (around 30 cm), frequent observations (11 days) and large coverage (5000 km2) allow us to track mass wasting as drivers such as the available energy change during the summer of 2015 in two study regions. We find that thaw slumps in the Tuktoyaktuk coastlands, Canada, are not energy limited in June, as they undergo limited mass wasting (height loss of around 0 cm day−1) despite the ample available energy, suggesting the widespread presence of early season insulating snow or debris veneer. Later in summer, height losses generally increase (around 3 cm day−1), but they do so in distinct ways. For many slumps, mass wasting tracks the available energy, a temporal pattern that is also observed at coastal yedoma cliffs on the Bykovsky Peninsula, Russia. However, the other two common temporal trajectories are asynchronous with the available energy, as they track strong precipitation events or show a sudden speed-up in late August respectively. The observed temporal patterns are poorly related to slump characteristics like the headwall height. The contrasting temporal behaviour of nearby thaw slumps highlights the importance of complex local and temporally varying controls on mass wasting. Article in Journal/Newspaper The Cryosphere Niedersächsisches Online-Archiv NOA Canada Tuktoyaktuk ENVELOPE(-133.006,-133.006,69.425,69.425) The Cryosphere 12 2 549 564 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Zwieback, Simon Kokelj, Steven V. Günther, Frank Boike, Julia Grosse, Guido Hajnsek, Irena Sub-seasonal thaw slump mass wasting is not consistently energy limited at the landscape scale |
topic_facet |
article Verlagsveröffentlichung |
description |
Predicting future thaw slump activity requires a sound understanding of the atmospheric drivers and geomorphic controls on mass wasting across a range of timescales. On sub-seasonal timescales, sparse measurements indicate that mass wasting at active slumps is often limited by the energy available for melting ground ice, but other factors such as rainfall or the formation of an insulating veneer may also be relevant. To study the sub-seasonal drivers, we derive topographic changes from single-pass radar interferometric data acquired by the TanDEM-X satellites. The estimated elevation changes at 12 m resolution complement the commonly observed planimetric retreat rates by providing information on volume losses. Their high vertical precision (around 30 cm), frequent observations (11 days) and large coverage (5000 km2) allow us to track mass wasting as drivers such as the available energy change during the summer of 2015 in two study regions. We find that thaw slumps in the Tuktoyaktuk coastlands, Canada, are not energy limited in June, as they undergo limited mass wasting (height loss of around 0 cm day−1) despite the ample available energy, suggesting the widespread presence of early season insulating snow or debris veneer. Later in summer, height losses generally increase (around 3 cm day−1), but they do so in distinct ways. For many slumps, mass wasting tracks the available energy, a temporal pattern that is also observed at coastal yedoma cliffs on the Bykovsky Peninsula, Russia. However, the other two common temporal trajectories are asynchronous with the available energy, as they track strong precipitation events or show a sudden speed-up in late August respectively. The observed temporal patterns are poorly related to slump characteristics like the headwall height. The contrasting temporal behaviour of nearby thaw slumps highlights the importance of complex local and temporally varying controls on mass wasting. |
format |
Article in Journal/Newspaper |
author |
Zwieback, Simon Kokelj, Steven V. Günther, Frank Boike, Julia Grosse, Guido Hajnsek, Irena |
author_facet |
Zwieback, Simon Kokelj, Steven V. Günther, Frank Boike, Julia Grosse, Guido Hajnsek, Irena |
author_sort |
Zwieback, Simon |
title |
Sub-seasonal thaw slump mass wasting is not consistently energy limited at the landscape scale |
title_short |
Sub-seasonal thaw slump mass wasting is not consistently energy limited at the landscape scale |
title_full |
Sub-seasonal thaw slump mass wasting is not consistently energy limited at the landscape scale |
title_fullStr |
Sub-seasonal thaw slump mass wasting is not consistently energy limited at the landscape scale |
title_full_unstemmed |
Sub-seasonal thaw slump mass wasting is not consistently energy limited at the landscape scale |
title_sort |
sub-seasonal thaw slump mass wasting is not consistently energy limited at the landscape scale |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/tc-12-549-2018 https://noa.gwlb.de/receive/cop_mods_00007312 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00007269/tc-12-549-2018.pdf https://tc.copernicus.org/articles/12/549/2018/tc-12-549-2018.pdf |
long_lat |
ENVELOPE(-133.006,-133.006,69.425,69.425) |
geographic |
Canada Tuktoyaktuk |
geographic_facet |
Canada Tuktoyaktuk |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-12-549-2018 https://noa.gwlb.de/receive/cop_mods_00007312 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00007269/tc-12-549-2018.pdf https://tc.copernicus.org/articles/12/549/2018/tc-12-549-2018.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/tc-12-549-2018 |
container_title |
The Cryosphere |
container_volume |
12 |
container_issue |
2 |
container_start_page |
549 |
op_container_end_page |
564 |
_version_ |
1766216657149100032 |