IMPACTS OF CLIMATE CHANGE ON DEBRIS FLOW OCCURRENCE IN THE CORDILLERA OF WESTERN CANADA AND THE EUROPEAN ALPS — IJEGE
 
 
You are here: Focus and scope Issues from 2005 to 2017 5th International Conference on Debris-Flow Hazards "Mitigation, Mechanics, Prediction and Assessment" Topic 1 - Debris-flow Occurrence and Initiation IMPACTS OF CLIMATE CHANGE ON DEBRIS FLOW OCCURRENCE IN THE CORDILLERA OF WESTERN CANADA AND THE EUROPEAN ALPS
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IMPACTS OF CLIMATE CHANGE ON DEBRIS FLOW OCCURRENCE IN THE CORDILLERA OF WESTERN CANADA AND THE EUROPEAN ALPS



Abstract:
In spite of a general agreement on present climate trends, actual impacts on terrestrial systems are still very debated. Evidence is mounting that climate change is affecting the stability of slopes, although the full extent, time, and magnitude of the response remain uncertain, in part because climate is only one of the factors contributing to slope instability. Moreover, at the regional and local scale climate change patterns can be very different. Mountain environment seems to respond promptly to climate warming, in part because of the presence of the cryosphere. The present paper contributes to discussions within the scientific community by discussing controls on debris flow occurrence in the Cordillera of western Canada and the European Alps. Several debris flow case studies illustrate how cryosphere degradation can play a significant role in debris flow occurrence in glacial and periglacial margins, both on a short and on a long time span. Processes responsible for debris flow development under a warming climate include rock falls and rockslides induced by glacier debuttressing, thaw of alpine permafrost, sudden draining of glacial lakes, and exposure of unconsolidated, unvegetated, and commonly ice-cored sediments due to glacier recession.

Authors:
Marta Chiarle - Consiglio Nazionale delle Ricerche - Istituto di Ricerca per la Protezione Idrogeologica U.O.S. Torino - Strada delle Cacce, 73 - 10135 Torino, Italy
Marten Geertsema - British Columbia Ministry of Forests and Range - 1011 4th Avenue - V2L 3H9 Prince George, B.C., Canada
Giovanni Mortara - Consiglio Nazionale delle Ricerche - Istituto di Ricerca per la Protezione Idrogeologica U.O.S. Torino - Strada delle Cacce, 73 - 10135 Torino, Italy
John J. Clague - Simon Fraser University - Department of Earth Sciences - 8888 University Drive - V5A 1S6 Burnaby, B.C., Canada
Keywords
Debris flow, cryosphere, climate change, Canadian Cordillera, European Alps
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