Instruments and Methods Monitoring ice-capped active Volc´an Villarrica, southern Chile, using terrestrial photography combined with automatic weather stations and global positioning systems
Volc´an Villarrica (39◦25 12 S, 71◦56 27 W; 2847ma.s.l.) is an active ice-capped volcano located in the Chilean lake district. The surface energy balance and glacier frontal variations have been monitored for several years, using automatic weather stations and satellite imagery. In recent field...
Main Authors: | , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
International Glaciological Society
2008
|
Subjects: | |
Online Access: | https://repositorio.uchile.cl/handle/2250/117802 |
id |
ftunivchile:oai:repositorio.uchile.cl:2250/117802 |
---|---|
record_format |
openpolar |
spelling |
ftunivchile:oai:repositorio.uchile.cl:2250/117802 2023-05-15T16:57:26+02:00 Instruments and Methods Monitoring ice-capped active Volc´an Villarrica, southern Chile, using terrestrial photography combined with automatic weather stations and global positioning systems Corripio, Javier G. Brock, Ben Clavero Ribes, Jorge Wendt, Jens Rivera Ibáñez, Sergio 2008-12 application/pdf https://repositorio.uchile.cl/handle/2250/117802 en eng International Glaciological Society Journal of Glaciology, Volume 54, Number 188, December 2008 , pp. 920-930(11) 1727-5652 https://repositorio.uchile.cl/handle/2250/117802 Artículo de revista 2008 ftunivchile 2023-03-05T00:54:31Z Volc´an Villarrica (39â—¦25 12 S, 71â—¦56 27 W; 2847ma.s.l.) is an active ice-capped volcano located in the Chilean lake district. The surface energy balance and glacier frontal variations have been monitored for several years, using automatic weather stations and satellite imagery. In recent field campaigns, surface topography was measured using Javad GPS receivers. Daily changes in snow-, iceand tephra-covered areas were recorded using an automatic digital camera installed on a rock outcrop. In spite of frequently damaging weather conditions, two series of consecutive images were obtained, in 2006 and 2007. These photographs were georeferenced to a resampled 90m pixel size SRTM digital elevation model and the reflectance values normalized according to several geometric and atmospheric parameters. The resulting daily maps of surface albedo are used as input to a distributed glacier-melt model during a 12 day mid-summer period. The spatial pattern of cumulative melt is complex and controlled by the distribution of airfall and wind-blown tephra, with extremely high melt rates occurring downwind of the crater and exposed ash banks. The camera images are also used to visualize the pattern of glacier crevassing. The results demonstrate the value of terrestrial photography in understanding the energy and mass balance of the glacier, including the generation of meltwater, and the potential value of the technique for monitoring volcanic activity and potential hazards associated with ice–volcano interactions during eruptive activity. This work was sponsored by Fondo Nacional de Ciencia y Tecnolog´ıa, Chile, (FONDECYT 1040515 and 7050177) Article in Journal/Newspaper Journal of Glaciology Universidad de Chile: Repositorio académico |
institution |
Open Polar |
collection |
Universidad de Chile: Repositorio académico |
op_collection_id |
ftunivchile |
language |
English |
description |
Volc´an Villarrica (39◦25 12 S, 71◦56 27 W; 2847ma.s.l.) is an active ice-capped volcano located in the Chilean lake district. The surface energy balance and glacier frontal variations have been monitored for several years, using automatic weather stations and satellite imagery. In recent field campaigns, surface topography was measured using Javad GPS receivers. Daily changes in snow-, iceand tephra-covered areas were recorded using an automatic digital camera installed on a rock outcrop. In spite of frequently damaging weather conditions, two series of consecutive images were obtained, in 2006 and 2007. These photographs were georeferenced to a resampled 90m pixel size SRTM digital elevation model and the reflectance values normalized according to several geometric and atmospheric parameters. The resulting daily maps of surface albedo are used as input to a distributed glacier-melt model during a 12 day mid-summer period. The spatial pattern of cumulative melt is complex and controlled by the distribution of airfall and wind-blown tephra, with extremely high melt rates occurring downwind of the crater and exposed ash banks. The camera images are also used to visualize the pattern of glacier crevassing. The results demonstrate the value of terrestrial photography in understanding the energy and mass balance of the glacier, including the generation of meltwater, and the potential value of the technique for monitoring volcanic activity and potential hazards associated with ice–volcano interactions during eruptive activity. This work was sponsored by Fondo Nacional de Ciencia y Tecnolog´ıa, Chile, (FONDECYT 1040515 and 7050177) |
format |
Article in Journal/Newspaper |
author |
Corripio, Javier G. Brock, Ben Clavero Ribes, Jorge Wendt, Jens Rivera Ibáñez, Sergio |
spellingShingle |
Corripio, Javier G. Brock, Ben Clavero Ribes, Jorge Wendt, Jens Rivera Ibáñez, Sergio Instruments and Methods Monitoring ice-capped active Volc´an Villarrica, southern Chile, using terrestrial photography combined with automatic weather stations and global positioning systems |
author_facet |
Corripio, Javier G. Brock, Ben Clavero Ribes, Jorge Wendt, Jens Rivera Ibáñez, Sergio |
author_sort |
Corripio, Javier G. |
title |
Instruments and Methods Monitoring ice-capped active Volc´an Villarrica, southern Chile, using terrestrial photography combined with automatic weather stations and global positioning systems |
title_short |
Instruments and Methods Monitoring ice-capped active Volc´an Villarrica, southern Chile, using terrestrial photography combined with automatic weather stations and global positioning systems |
title_full |
Instruments and Methods Monitoring ice-capped active Volc´an Villarrica, southern Chile, using terrestrial photography combined with automatic weather stations and global positioning systems |
title_fullStr |
Instruments and Methods Monitoring ice-capped active Volc´an Villarrica, southern Chile, using terrestrial photography combined with automatic weather stations and global positioning systems |
title_full_unstemmed |
Instruments and Methods Monitoring ice-capped active Volc´an Villarrica, southern Chile, using terrestrial photography combined with automatic weather stations and global positioning systems |
title_sort |
instruments and methods monitoring ice-capped active volcâ´an villarrica, southern chile, using terrestrial photography combined with automatic weather stations and global positioning systems |
publisher |
International Glaciological Society |
publishDate |
2008 |
url |
https://repositorio.uchile.cl/handle/2250/117802 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_relation |
Journal of Glaciology, Volume 54, Number 188, December 2008 , pp. 920-930(11) 1727-5652 https://repositorio.uchile.cl/handle/2250/117802 |
_version_ |
1766048982668148736 |