Iceberg jam floods in Icelandic proglacial rivers: testing the self-organized criticality hypothesis

Hdl Handle:
http://hdl.handle.net/10034/605437
Title:
Iceberg jam floods in Icelandic proglacial rivers: testing the self-organized criticality hypothesis
Authors:
Roussel, Erwan; Toumazet, Jean-Pierre; Marren, Philip M.; Cossart, Etienne
Abstract:
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.
Affiliation:
University Clermont Auvergne; University Blaise Pascal; CNRS ; University of Chester
Citation:
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
Publisher:
GFG
Journal:
Géomorphologie : relief, processus, environnement
Publication Date:
Mar-2016
URI:
http://hdl.handle.net/10034/605437
DOI:
10.4000/geomorphologie.11229
Additional Links:
http://geomorphologie.revues.org/11229
Type:
Article
Language:
en
EISSN:
1957-777X
Appears in Collections:
Geography and Development Studies

Full metadata record

DC FieldValue Language
dc.contributor.authorRoussel, Erwanen
dc.contributor.authorToumazet, Jean-Pierreen
dc.contributor.authorMarren, Philip M.en
dc.contributor.authorCossart, Etienneen
dc.date.accessioned2016-04-15T09:00:23Zen
dc.date.available2016-04-15T09:00:23Zen
dc.date.issued2016-03en
dc.identifier.citationRoussel, 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.11229en
dc.identifier.doi10.4000/geomorphologie.11229en
dc.identifier.urihttp://hdl.handle.net/10034/605437en
dc.description.abstractIn 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.en
dc.language.isoenen
dc.publisherGFGen
dc.relation.urlhttp://geomorphologie.revues.org/11229en
dc.subjectProglacial riversen
dc.subjectProglacial lakesen
dc.subjectIcelanden
dc.subjectSelf organised criticalityen
dc.titleIceberg jam floods in Icelandic proglacial rivers: testing the self-organized criticality hypothesisen
dc.typeArticleen
dc.identifier.eissn1957-777Xen
dc.contributor.departmentUniversity Clermont Auvergne; University Blaise Pascal; CNRS ; University of Chesteren
dc.identifier.journalGéomorphologie : relief, processus, environnementen
dc.date.accepted2015-12-21en
or.grant.openaccessYesen
rioxxterms.funderxxen
rioxxterms.identifier.projectxxen
rioxxterms.versionAMen
rioxxterms.licenseref.startdate2016-04-28en
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