Iceberg jam floods in Icelandic proglacial rivers: testing the self-organized criticality hypothesis
In this paper, we describe a fluvial marginal process associated with the formation of iceberg jams in Icelandic proglacial lakes. The floods triggered by the release of these iceberg jams have implications for the geomorphic evolution of the proglacial fluvial system. The process of iceberg jam flo...
Published in: | Géomorphologie : relief, processus, environnement |
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Online Access: | http://hdl.handle.net/10034/605437 https://doi.org/10.4000/geomorphologie.11229 |
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ftchesteruniv:oai:chesterrep.openrepository.com:10034/605437 2023-05-15T16:47:51+02:00 Iceberg jam floods in Icelandic proglacial rivers: testing the self-organized criticality hypothesis Roussel, Erwan Toumazet, Jean-Pierre Marren, Philip M. Cossart, Etienne University Clermont Auvergne; University Blaise Pascal; CNRS University of Chester 2016-04-15 http://hdl.handle.net/10034/605437 https://doi.org/10.4000/geomorphologie.11229 en eng GFG http://geomorphologie.revues.org/11229 Roussel, E., Toumazet, J.-P., Marren, P. M., Cossart, E. (2016). Iceberg jam floods in Icelandic proglacial rivers: testing the self-organized criticality hypothesis. Géomorphologie: relief, processus, environnement, 22(1), 37-49. DOI:10.4000/geomorphologie.11229 doi:10.4000/geomorphologie.11229 http://hdl.handle.net/10034/605437 1957-777X Géomorphologie : relief, processus, environnement Proglacial rivers Proglacial lakes Iceland Self organised criticality Article 2016 ftchesteruniv https://doi.org/10.4000/geomorphologie.11229 2022-03-02T19:57:21Z In this paper, we describe a fluvial marginal process associated with the formation of iceberg jams in Icelandic proglacial lakes. The floods triggered by the release of these iceberg jams have implications for the geomorphic evolution of the proglacial fluvial system. The process of iceberg jam floods share some conceptual characteristics with Self-Organized Criticality (SOC) approach of complex systems. Using a simple numerical model and field observations, we test the hypothesis that iceberg jam floods exhibit SOC. Field observations and aerial photo-interpretations in southeastern Iceland demonstrate the occurrence of icebergs jam in ice-contact lakes. The mapping of the south Vatnajökull margins between 2003 and 2012 reveals an increase of the calving potentiality and a rise in the likelihood of iceberg jam flood occurrence. Based on the results of the numerical model and field observations, we suggest that iceberg jam floods should be recognized as a SOC phenomenon. Analysis of the simulated time-series show that the iceberg jam floods become less frequent and more similar in magnitude over time. This global trend is related to the gradual enlargement of the lake outlet channel. Article in Journal/Newspaper Iceland Vatnajökull University of Chester: Chester Digital Repository Vatnajökull ENVELOPE(-16.823,-16.823,64.420,64.420) Géomorphologie : relief, processus, environnement 22 1 37 49 |
institution |
Open Polar |
collection |
University of Chester: Chester Digital Repository |
op_collection_id |
ftchesteruniv |
language |
English |
topic |
Proglacial rivers Proglacial lakes Iceland Self organised criticality |
spellingShingle |
Proglacial rivers Proglacial lakes Iceland Self organised criticality Roussel, Erwan Toumazet, Jean-Pierre Marren, Philip M. Cossart, Etienne Iceberg jam floods in Icelandic proglacial rivers: testing the self-organized criticality hypothesis |
topic_facet |
Proglacial rivers Proglacial lakes Iceland Self organised criticality |
description |
In this paper, we describe a fluvial marginal process associated with the formation of iceberg jams in Icelandic proglacial lakes. The floods triggered by the release of these iceberg jams have implications for the geomorphic evolution of the proglacial fluvial system. The process of iceberg jam floods share some conceptual characteristics with Self-Organized Criticality (SOC) approach of complex systems. Using a simple numerical model and field observations, we test the hypothesis that iceberg jam floods exhibit SOC. Field observations and aerial photo-interpretations in southeastern Iceland demonstrate the occurrence of icebergs jam in ice-contact lakes. The mapping of the south Vatnajökull margins between 2003 and 2012 reveals an increase of the calving potentiality and a rise in the likelihood of iceberg jam flood occurrence. Based on the results of the numerical model and field observations, we suggest that iceberg jam floods should be recognized as a SOC phenomenon. Analysis of the simulated time-series show that the iceberg jam floods become less frequent and more similar in magnitude over time. This global trend is related to the gradual enlargement of the lake outlet channel. |
author2 |
University Clermont Auvergne; University Blaise Pascal; CNRS University of Chester |
format |
Article in Journal/Newspaper |
author |
Roussel, Erwan Toumazet, Jean-Pierre Marren, Philip M. Cossart, Etienne |
author_facet |
Roussel, Erwan Toumazet, Jean-Pierre Marren, Philip M. Cossart, Etienne |
author_sort |
Roussel, Erwan |
title |
Iceberg jam floods in Icelandic proglacial rivers: testing the self-organized criticality hypothesis |
title_short |
Iceberg jam floods in Icelandic proglacial rivers: testing the self-organized criticality hypothesis |
title_full |
Iceberg jam floods in Icelandic proglacial rivers: testing the self-organized criticality hypothesis |
title_fullStr |
Iceberg jam floods in Icelandic proglacial rivers: testing the self-organized criticality hypothesis |
title_full_unstemmed |
Iceberg jam floods in Icelandic proglacial rivers: testing the self-organized criticality hypothesis |
title_sort |
iceberg jam floods in icelandic proglacial rivers: testing the self-organized criticality hypothesis |
publisher |
GFG |
publishDate |
2016 |
url |
http://hdl.handle.net/10034/605437 https://doi.org/10.4000/geomorphologie.11229 |
long_lat |
ENVELOPE(-16.823,-16.823,64.420,64.420) |
geographic |
Vatnajökull |
geographic_facet |
Vatnajökull |
genre |
Iceland Vatnajökull |
genre_facet |
Iceland Vatnajökull |
op_relation |
http://geomorphologie.revues.org/11229 Roussel, E., Toumazet, J.-P., Marren, P. M., Cossart, E. (2016). Iceberg jam floods in Icelandic proglacial rivers: testing the self-organized criticality hypothesis. Géomorphologie: relief, processus, environnement, 22(1), 37-49. DOI:10.4000/geomorphologie.11229 doi:10.4000/geomorphologie.11229 http://hdl.handle.net/10034/605437 1957-777X Géomorphologie : relief, processus, environnement |
op_doi |
https://doi.org/10.4000/geomorphologie.11229 |
container_title |
Géomorphologie : relief, processus, environnement |
container_volume |
22 |
container_issue |
1 |
container_start_page |
37 |
op_container_end_page |
49 |
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1766037951496585216 |