State and dynamics of a tropical rock glacier on the Altiplano (Bolivia, 21.5°S) during the last two decades
Poster On the Southern Bolivian Altiplano (Sur Lipez), glaciers are almost absent today whereas ice-rich permafrost affects numerous debris accumulation sectors and constitutes an unknown contributor to the hydrology of the region as well as a precious climatic indicator. In this tropical, but rathe...
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HAL CCSD
2010
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Online Access: | https://hal.archives-ouvertes.fr/halsde-00594364 |
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ftccsdartic:oai:HAL:halsde-00594364v1 |
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openpolar |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
[SDE.MCG]Environmental Sciences/Global Changes Bodin, Xavier Francou, Bernard Arnaud, Yves Fabre, Denis State and dynamics of a tropical rock glacier on the Altiplano (Bolivia, 21.5°S) during the last two decades |
topic_facet |
[SDE.MCG]Environmental Sciences/Global Changes |
description |
Poster On the Southern Bolivian Altiplano (Sur Lipez), glaciers are almost absent today whereas ice-rich permafrost affects numerous debris accumulation sectors and constitutes an unknown contributor to the hydrology of the region as well as a precious climatic indicator. In this tropical, but rather arid mountainous environment, the Caquella rock glacier, which develops between 5600 and 5400 m a.s.l., has been surveyed for more than 15 years by IRD. This paper intends to synthesise the main results regarding the state of the rock glacier and its dynamics, especially with respect to the warm decades of the 1980's and 1990's. First, geomorphological analysis allows us to understand the genesis and history of the rock glacier during the Quaternary. A model of internal structure of the landform obtained from geoelectrical soundings is also coupled with repeated geodetic measurement of boulders on the surface to assess the rock glacier dynamics. Topo- and micro-climatic records associated with climatic data analysis provide new insights of the short- and mid-term relations between permafrost and climate at tropical latitudes. The potential degrading state of the permafrost at this site and its hydrological significance for the Altiplano is finally discussed. |
author2 |
Instituto de Geografia Pontifica Universidad Catolica de Chile Great Ice Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'étude des transferts en hydrologie et environnement (LTHE) Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Centre d'enseignement Cnam Paris (CNAM Paris) Conservatoire National des Arts et Métiers CNAM (CNAM) |
format |
Conference Object |
author |
Bodin, Xavier Francou, Bernard Arnaud, Yves Fabre, Denis |
author_facet |
Bodin, Xavier Francou, Bernard Arnaud, Yves Fabre, Denis |
author_sort |
Bodin, Xavier |
title |
State and dynamics of a tropical rock glacier on the Altiplano (Bolivia, 21.5°S) during the last two decades |
title_short |
State and dynamics of a tropical rock glacier on the Altiplano (Bolivia, 21.5°S) during the last two decades |
title_full |
State and dynamics of a tropical rock glacier on the Altiplano (Bolivia, 21.5°S) during the last two decades |
title_fullStr |
State and dynamics of a tropical rock glacier on the Altiplano (Bolivia, 21.5°S) during the last two decades |
title_full_unstemmed |
State and dynamics of a tropical rock glacier on the Altiplano (Bolivia, 21.5°S) during the last two decades |
title_sort |
state and dynamics of a tropical rock glacier on the altiplano (bolivia, 21.5°s) during the last two decades |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.archives-ouvertes.fr/halsde-00594364 |
op_coverage |
Valdivia, Chile |
long_lat |
ENVELOPE(163.917,163.917,-78.133,-78.133) |
geographic |
The Altiplano |
geographic_facet |
The Altiplano |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
International Glaciological Conference VICC 2010 Ice and Climate Change: A View from the South https://hal.archives-ouvertes.fr/halsde-00594364 International Glaciological Conference VICC 2010 Ice and Climate Change: A View from the South, Mar 2010, Valdivia, Chile |
op_relation |
halsde-00594364 https://hal.archives-ouvertes.fr/halsde-00594364 |
_version_ |
1766027732450279424 |
spelling |
ftccsdartic:oai:HAL:halsde-00594364v1 2023-05-15T16:37:26+02:00 State and dynamics of a tropical rock glacier on the Altiplano (Bolivia, 21.5°S) during the last two decades Bodin, Xavier Francou, Bernard Arnaud, Yves Fabre, Denis Instituto de Geografia Pontifica Universidad Catolica de Chile Great Ice Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'étude des transferts en hydrologie et environnement (LTHE) Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Centre d'enseignement Cnam Paris (CNAM Paris) Conservatoire National des Arts et Métiers CNAM (CNAM) Valdivia, Chile 2010-03-01 https://hal.archives-ouvertes.fr/halsde-00594364 en eng HAL CCSD halsde-00594364 https://hal.archives-ouvertes.fr/halsde-00594364 International Glaciological Conference VICC 2010 Ice and Climate Change: A View from the South https://hal.archives-ouvertes.fr/halsde-00594364 International Glaciological Conference VICC 2010 Ice and Climate Change: A View from the South, Mar 2010, Valdivia, Chile [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/conferenceObject Conference papers 2010 ftccsdartic 2021-10-24T17:48:24Z Poster On the Southern Bolivian Altiplano (Sur Lipez), glaciers are almost absent today whereas ice-rich permafrost affects numerous debris accumulation sectors and constitutes an unknown contributor to the hydrology of the region as well as a precious climatic indicator. In this tropical, but rather arid mountainous environment, the Caquella rock glacier, which develops between 5600 and 5400 m a.s.l., has been surveyed for more than 15 years by IRD. This paper intends to synthesise the main results regarding the state of the rock glacier and its dynamics, especially with respect to the warm decades of the 1980's and 1990's. First, geomorphological analysis allows us to understand the genesis and history of the rock glacier during the Quaternary. A model of internal structure of the landform obtained from geoelectrical soundings is also coupled with repeated geodetic measurement of boulders on the surface to assess the rock glacier dynamics. Topo- and micro-climatic records associated with climatic data analysis provide new insights of the short- and mid-term relations between permafrost and climate at tropical latitudes. The potential degrading state of the permafrost at this site and its hydrological significance for the Altiplano is finally discussed. Conference Object Ice permafrost Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) The Altiplano ENVELOPE(163.917,163.917,-78.133,-78.133) |