The short-term response of rockglaciers creep to recent warm periods in the European Alps (2002-2007)
International audience As sediment conveyors, rockglaciers - and more generally the creep of perennially frozen ground may be the source of slope instability processes (e.g. rock falls, debris flows) on steep valley sides in a mountain environment. Any change in the rate of permafrost creep is susce...
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ftccsdartic:oai:HAL:hal-02595256v1 2023-05-15T16:37:48+02:00 The short-term response of rockglaciers creep to recent warm periods in the European Alps (2002-2007) Une réponse à court terme au glissement des glaciers rocheux durant les récentes périodes de chaleurs dans les Alpes Européennes (2002-2007) Delaloye, R. Avian, M. Bodin, X. Hausmann, H. Kaufmann, V. Kellerer Pirklbauer, A. Krainer, K. Lambiel, C. Roer, I. Thibert, Emmanuel UNIVERSITY OF FRIBOURG DEPARTMENT OF GEOSCIENCES GEOGRAPHY UNIT CHE Partenaires IRSTEA Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) GRAZ UNIVERSITY OF TECHNOLOGY INSTITUTE OF REMOTE SENSING AND PHOTOGRAMMETRY AUT Université Paris Diderot - Paris 7 (UPD7) VIENNA UNIVERSITY OF TECHNOLOGY RESEARCH GROUP GEOPHYSICS AUT UNIVERSITY OF GRAZ INSTITUTE OF GEOGRAPHY AND REGIONAL SCIENCE AUT UNIVERSITY OF INNSBRUCK INSTITUTE OF GEOLOGY AND PALEONTOLOGY AUT UNIVERSITY OF LAUSANNE INSTITUTE OF GEOGRAPHY CHE UNIVERSITY OF ZURICH DEPARTMENT OF GEOGRAPHY CHE Érosion torrentielle, neige et avalanches (UR ETGR (ETNA)) Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF) Fairbanks, United States 2008-06-29 https://hal.inrae.fr/hal-02595256 en eng HAL CCSD hal-02595256 https://hal.inrae.fr/hal-02595256 IRSTEA: PUB00032210 9th International Conference on Permafrost https://hal.inrae.fr/hal-02595256 9th International Conference on Permafrost, Jun 2008, Fairbanks, United States ALPES [SDE]Environmental Sciences info:eu-repo/semantics/conferenceObject Conference papers 2008 ftccsdartic 2021-08-07T23:06:01Z International audience As sediment conveyors, rockglaciers - and more generally the creep of perennially frozen ground may be the source of slope instability processes (e.g. rock falls, debris flows) on steep valley sides in a mountain environment. Any change in the rate of permafrost creep is susceptible to affect both the frequency and magnitude of related slope instabilities. There is currently an increasing interest in the densely inhabitated European Alps to document the behaviour of the high-altitude permafrost environment. Studies on rock glacier dynamics have shown that three superimposed types of temporal variability in surface motion can be envisaged at a secular scale: a seasonal rhythm, changes in annual mean velocities, a decadal to pluri-decadal trend. The present contribution compares and analyses the variations in annual velocities that have been observed at the surface of rock glaciers in the European Alps since 2002/03. It represents a pioneer attempt to synthesize the annual variations of rockglaciers activity at this scale. Short-term changes in surface motion of rockglaciers have been monitored in the European Alps since a few years by several research groups, mostly by means of real time kinematics GPS or geodetic survey using a total station. Annual series have been acquired between 2002/03 and 2006/07 on more than 13 rockglaciers located in different parts of the alpine arc. The provided dataset is analysed paying regard especially to two extreme warm climatic events that affected the European alpine region during the 2003-2007 period: the heat wave of summer 2003 and the 2006-07 warm swell, namely a 15-month period of quasi continuous large positive temperature anomaly between April 2006 and June 2007. Despite different size, morphology, ice content, complexity of flow field, mean annual velocity, seasonal rhythm, etc., the compared rockglaciers have surprisingly shown so far a rather homogeneous and synchronous behaviour since 2003: most of them reached a maximal rate of activity in ... Conference Object Ice permafrost Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Fairbanks |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
ALPES [SDE]Environmental Sciences |
spellingShingle |
ALPES [SDE]Environmental Sciences Delaloye, R. Avian, M. Bodin, X. Hausmann, H. Kaufmann, V. Kellerer Pirklbauer, A. Krainer, K. Lambiel, C. Roer, I. Thibert, Emmanuel The short-term response of rockglaciers creep to recent warm periods in the European Alps (2002-2007) |
topic_facet |
ALPES [SDE]Environmental Sciences |
description |
International audience As sediment conveyors, rockglaciers - and more generally the creep of perennially frozen ground may be the source of slope instability processes (e.g. rock falls, debris flows) on steep valley sides in a mountain environment. Any change in the rate of permafrost creep is susceptible to affect both the frequency and magnitude of related slope instabilities. There is currently an increasing interest in the densely inhabitated European Alps to document the behaviour of the high-altitude permafrost environment. Studies on rock glacier dynamics have shown that three superimposed types of temporal variability in surface motion can be envisaged at a secular scale: a seasonal rhythm, changes in annual mean velocities, a decadal to pluri-decadal trend. The present contribution compares and analyses the variations in annual velocities that have been observed at the surface of rock glaciers in the European Alps since 2002/03. It represents a pioneer attempt to synthesize the annual variations of rockglaciers activity at this scale. Short-term changes in surface motion of rockglaciers have been monitored in the European Alps since a few years by several research groups, mostly by means of real time kinematics GPS or geodetic survey using a total station. Annual series have been acquired between 2002/03 and 2006/07 on more than 13 rockglaciers located in different parts of the alpine arc. The provided dataset is analysed paying regard especially to two extreme warm climatic events that affected the European alpine region during the 2003-2007 period: the heat wave of summer 2003 and the 2006-07 warm swell, namely a 15-month period of quasi continuous large positive temperature anomaly between April 2006 and June 2007. Despite different size, morphology, ice content, complexity of flow field, mean annual velocity, seasonal rhythm, etc., the compared rockglaciers have surprisingly shown so far a rather homogeneous and synchronous behaviour since 2003: most of them reached a maximal rate of activity in ... |
author2 |
UNIVERSITY OF FRIBOURG DEPARTMENT OF GEOSCIENCES GEOGRAPHY UNIT CHE Partenaires IRSTEA Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) GRAZ UNIVERSITY OF TECHNOLOGY INSTITUTE OF REMOTE SENSING AND PHOTOGRAMMETRY AUT Université Paris Diderot - Paris 7 (UPD7) VIENNA UNIVERSITY OF TECHNOLOGY RESEARCH GROUP GEOPHYSICS AUT UNIVERSITY OF GRAZ INSTITUTE OF GEOGRAPHY AND REGIONAL SCIENCE AUT UNIVERSITY OF INNSBRUCK INSTITUTE OF GEOLOGY AND PALEONTOLOGY AUT UNIVERSITY OF LAUSANNE INSTITUTE OF GEOGRAPHY CHE UNIVERSITY OF ZURICH DEPARTMENT OF GEOGRAPHY CHE Érosion torrentielle, neige et avalanches (UR ETGR (ETNA)) Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF) |
format |
Conference Object |
author |
Delaloye, R. Avian, M. Bodin, X. Hausmann, H. Kaufmann, V. Kellerer Pirklbauer, A. Krainer, K. Lambiel, C. Roer, I. Thibert, Emmanuel |
author_facet |
Delaloye, R. Avian, M. Bodin, X. Hausmann, H. Kaufmann, V. Kellerer Pirklbauer, A. Krainer, K. Lambiel, C. Roer, I. Thibert, Emmanuel |
author_sort |
Delaloye, R. |
title |
The short-term response of rockglaciers creep to recent warm periods in the European Alps (2002-2007) |
title_short |
The short-term response of rockglaciers creep to recent warm periods in the European Alps (2002-2007) |
title_full |
The short-term response of rockglaciers creep to recent warm periods in the European Alps (2002-2007) |
title_fullStr |
The short-term response of rockglaciers creep to recent warm periods in the European Alps (2002-2007) |
title_full_unstemmed |
The short-term response of rockglaciers creep to recent warm periods in the European Alps (2002-2007) |
title_sort |
short-term response of rockglaciers creep to recent warm periods in the european alps (2002-2007) |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.inrae.fr/hal-02595256 |
op_coverage |
Fairbanks, United States |
geographic |
Fairbanks |
geographic_facet |
Fairbanks |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
9th International Conference on Permafrost https://hal.inrae.fr/hal-02595256 9th International Conference on Permafrost, Jun 2008, Fairbanks, United States |
op_relation |
hal-02595256 https://hal.inrae.fr/hal-02595256 IRSTEA: PUB00032210 |
_version_ |
1766028096623869952 |