Characterizing major avalanche episodes in space and time in the twentieth and early twentyfirst centuries in the Catalan Pyrenees

With the aim of better understanding avalanche risk in the Catalan Pyrenees, the present work focuses on the analysis of major (or destructive) avalanches. For such purpose major avalanche cartography was made by an exhaustive photointerpretation of several flights, winter and summer field surveys a...

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Detalles Bibliográficos
Autores: Oller i Figueras, Pere, Muntán Bordas, Elena, García i Sellés, Carles, Furdada i Bellavista, Glòria, Baeza, Cristina, Angulo Bahón, Cecilio
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2015
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/64685
Acceso en línea:https://hdl.handle.net/2445/64685
Access Level:acceso abierto
Palabra clave:Allaus
Pirineu català (Catalunya)
Avalanches
Catalonian pyrenees (Catalonia)
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spelling Characterizing major avalanche episodes in space and time in the twentieth and early twentyfirst centuries in the Catalan PyreneesOller i Figueras, PereMuntán Bordas, ElenaGarcía i Sellés, CarlesFurdada i Bellavista, GlòriaBaeza, CristinaAngulo Bahón, CecilioAllausPirineu català (Catalunya)AvalanchesCatalonian pyrenees (Catalonia)With the aim of better understanding avalanche risk in the Catalan Pyrenees, the present work focuses on the analysis of major (or destructive) avalanches. For such purpose major avalanche cartography was made by an exhaustive photointerpretation of several flights, winter and summer field surveys and inquiries to local population. Major avalanche events were used to quantify the magnitude of the episodes during which they occurred, and a Major Avalanche Activity Magnitude Index (MAAMI) was developed. This index is based on the number of major avalanches registered and its estimated frequency in a given time period, hence it quantifies the magnitude of a major avalanche episode or winter. Furthermore, it permits a comparison of the magnitude between major avalanche episodes in a given mountain range, or between mountain ranges, and for a long enough period, it should allow analysis of temporal trends. Major episodes from winter 1995/96 to 2013/14 were reconstructed. Their magnitude, frequency and extent were also assessed. During the last 19 winters, the episodes of January 22-23 and February 6-8 in 1996 were those with highest MAAMI values,followed by January 30-31, 2003, January 29, 2006, and January 24-25, 2014. To analyze the whole twentieth century, a simplified MAAMI was defined in order to attain the same purpose with a less complete dataset. With less accuracy, the same parameters were obtained at winter time resolution throughout the twentieth century. Again, 1995/96 winter had the highest MAAMI value followed by 1971/72, 1974/75 and 1937/38 winter seasons. The analysis of the spatial extent of the different episodes allowed refining the demarcation of nivological regions, and improving our knowledge about the atmospheric patterns that cause major episodes and their climatic interpretation. In some cases, the importance of considering a major avalanche episode as the result of a previous preparatory period, followed by a triggering one was revealed.Elsevier B.V.2015201520152015info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersion20 p.application/pdfapplication/pdfhttps://hdl.handle.net/2445/64685Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésVersió postprint del document publicat a: http://10.1016/j.coldregions.2014.11.012Cold Regions Science and Technology, 2015, num. 110, p. 129-148http://dx.doi.org/10.1016/j.coldregions.2014.11.012(c) Elsevier B.V., 2015info:eu-repo/semantics/openAccessoai:recercat.cat:2445/646852026-05-29T05:05:01Z
dc.title.none.fl_str_mv Characterizing major avalanche episodes in space and time in the twentieth and early twentyfirst centuries in the Catalan Pyrenees
title Characterizing major avalanche episodes in space and time in the twentieth and early twentyfirst centuries in the Catalan Pyrenees
spellingShingle Characterizing major avalanche episodes in space and time in the twentieth and early twentyfirst centuries in the Catalan Pyrenees
Oller i Figueras, Pere
Allaus
Pirineu català (Catalunya)
Avalanches
Catalonian pyrenees (Catalonia)
title_short Characterizing major avalanche episodes in space and time in the twentieth and early twentyfirst centuries in the Catalan Pyrenees
title_full Characterizing major avalanche episodes in space and time in the twentieth and early twentyfirst centuries in the Catalan Pyrenees
title_fullStr Characterizing major avalanche episodes in space and time in the twentieth and early twentyfirst centuries in the Catalan Pyrenees
title_full_unstemmed Characterizing major avalanche episodes in space and time in the twentieth and early twentyfirst centuries in the Catalan Pyrenees
title_sort Characterizing major avalanche episodes in space and time in the twentieth and early twentyfirst centuries in the Catalan Pyrenees
dc.creator.none.fl_str_mv Oller i Figueras, Pere
Muntán Bordas, Elena
García i Sellés, Carles
Furdada i Bellavista, Glòria
Baeza, Cristina
Angulo Bahón, Cecilio
author Oller i Figueras, Pere
author_facet Oller i Figueras, Pere
Muntán Bordas, Elena
García i Sellés, Carles
Furdada i Bellavista, Glòria
Baeza, Cristina
Angulo Bahón, Cecilio
author_role author
author2 Muntán Bordas, Elena
García i Sellés, Carles
Furdada i Bellavista, Glòria
Baeza, Cristina
Angulo Bahón, Cecilio
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Allaus
Pirineu català (Catalunya)
Avalanches
Catalonian pyrenees (Catalonia)
topic Allaus
Pirineu català (Catalunya)
Avalanches
Catalonian pyrenees (Catalonia)
description With the aim of better understanding avalanche risk in the Catalan Pyrenees, the present work focuses on the analysis of major (or destructive) avalanches. For such purpose major avalanche cartography was made by an exhaustive photointerpretation of several flights, winter and summer field surveys and inquiries to local population. Major avalanche events were used to quantify the magnitude of the episodes during which they occurred, and a Major Avalanche Activity Magnitude Index (MAAMI) was developed. This index is based on the number of major avalanches registered and its estimated frequency in a given time period, hence it quantifies the magnitude of a major avalanche episode or winter. Furthermore, it permits a comparison of the magnitude between major avalanche episodes in a given mountain range, or between mountain ranges, and for a long enough period, it should allow analysis of temporal trends. Major episodes from winter 1995/96 to 2013/14 were reconstructed. Their magnitude, frequency and extent were also assessed. During the last 19 winters, the episodes of January 22-23 and February 6-8 in 1996 were those with highest MAAMI values,followed by January 30-31, 2003, January 29, 2006, and January 24-25, 2014. To analyze the whole twentieth century, a simplified MAAMI was defined in order to attain the same purpose with a less complete dataset. With less accuracy, the same parameters were obtained at winter time resolution throughout the twentieth century. Again, 1995/96 winter had the highest MAAMI value followed by 1971/72, 1974/75 and 1937/38 winter seasons. The analysis of the spatial extent of the different episodes allowed refining the demarcation of nivological regions, and improving our knowledge about the atmospheric patterns that cause major episodes and their climatic interpretation. In some cases, the importance of considering a major avalanche episode as the result of a previous preparatory period, followed by a triggering one was revealed.
publishDate 2015
dc.date.none.fl_str_mv 2015
2015
2015
2015
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/64685
url https://hdl.handle.net/2445/64685
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: http://10.1016/j.coldregions.2014.11.012
Cold Regions Science and Technology, 2015, num. 110, p. 129-148
http://dx.doi.org/10.1016/j.coldregions.2014.11.012
dc.rights.none.fl_str_mv (c) Elsevier B.V., 2015
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Elsevier B.V., 2015
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 20 p.
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier B.V.
publisher.none.fl_str_mv Elsevier B.V.
dc.source.none.fl_str_mv Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.812429

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