Validating numerical simulations of snow avalanches using dendrochronology: the Cerro Ventana event in Northern Patagonia, Argentina
| Autor: | Alejandro Casteller, Hugo Martínez, Ricardo Villalba, Marc Christen, Veronika Stöckli, Perry Bartelt, Juan Carlos Leiva |
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| Přispěvatelé: | Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales IANIGLA, WSL, Swiss Federal Institute for Snow and Avalanche Research SLF, Instituto de Estudios y Prevención de Riesgos Naturales (IDEPRN), Facultad de Ingeniería [Mendoza], Universidad Nacional de Cuyo [Mendoza] (UNCUYO)-Universidad Nacional de Cuyo [Mendoza] (UNCUYO), EGU, Publication |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
010504 meteorology & atmospheric sciences
Meteorology 0211 other engineering and technologies [SDU.STU]Sciences of the Universe [physics]/Earth Sciences 02 engineering and technology 01 natural sciences Deposition (geology) lcsh:TD1-1066 Natural hazard Dendrochronology lcsh:Environmental technology. Sanitary engineering Digital elevation model [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment lcsh:Environmental sciences 0105 earth and related environmental sciences lcsh:GE1-350 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere 021110 strategic defence & security studies Mountaineering biology [SDU.OCEAN] Sciences of the Universe [physics]/Ocean Atmosphere lcsh:QE1-996.5 lcsh:Geography. Anthropology. Recreation biology.organism_classification Snow [SDU.ENVI] Sciences of the Universe [physics]/Continental interfaces environment lcsh:Geology lcsh:G 13. Climate action Threatened species [SDU.STU] Sciences of the Universe [physics]/Earth Sciences General Earth and Planetary Sciences Physical geography Nothofagus pumilio Geology |
| Zdroj: | Natural Hazards and Earth System Sciences Natural Hazards and Earth System Sciences, Copernicus Publ. / European Geosciences Union, 2008, 8 (3), pp.433-443 Natural Hazards and Earth System Sciences, Vol 8, Iss 3, Pp 433-443 (2008) Natural Hazards and Earth System Sciences, 8 (3) |
| ISSN: | 1684-9981 1561-8633 |
| Popis: | The damage caused by snow avalanches to property and human lives is underestimated in many regions around the world, especially where this natural hazard remains poorly documented. One such region is the Argentinean Andes, where numerous settlements are threatened almost every winter by large snow avalanches. On 1 September 2002, the largest tragedy in the history of Argentinean mountaineering took place at Cerro Ventana, Northern Patagonia: nine persons were killed and seven others injured by a snow avalanche. In this paper, we combine both numerical modeling and dendrochronological investigations to reconstruct this event. Using information released by local governmental authorities and compiled in the field, the avalanche event was numerically simulated using the avalanche dynamics programs AVAL-1D and RAMMS. Avalanche characteristics, such as extent and date were determined using dendrochronological techniques. Model simulation results were compared with documentary and tree-ring evidences for the 2002 event. Our results show a good agreement between the simulated projection of the avalanche and its reconstructed extent using tree-ring records. Differences between the observed and the simulated avalanche, principally related to the snow height deposition in the run-out zone, are mostly attributed to the low resolution of the digital elevation model used to represent the valley topography. The main contributions of this study are (1) to provide the first calibration of numerical avalanche models for the Patagonian Andes and (2) to highlight the potential of Nothofagus pumilio tree-ring records to reconstruct past snow-avalanche events in time and space. Future research should focus on testing this combined approach in other forested regions of the Andes. |
| Databáze: | OpenAIRE |
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