Multi-annual kinematics of an active rock glacier quantified from very high-resolution DEMs: an application-case in the French Alps
Rock glaciers result from the long-term creeping of ice-rich permafrost along mountain slopes. Under warming conditions, deformation is expected to increase, and potential destabilization of those landforms may lead to hazardous phenomena. Monitoring the kinematics of rock glaciers at fine spatial r...
Published in: | Remote Sensing |
---|---|
Main Authors: | , , , , |
Other Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2018
|
Subjects: | |
Online Access: | https://irsteadoc.irstea.fr/cemoa/PUB00060682 |
id |
ftcemoa:oai:irsteadoc.irstea.fr:PUB00060682 |
---|---|
record_format |
openpolar |
spelling |
ftcemoa:oai:irsteadoc.irstea.fr:PUB00060682 2023-05-15T16:37:54+02:00 Multi-annual kinematics of an active rock glacier quantified from very high-resolution DEMs: an application-case in the French Alps Bodin, X. Thibert, E. Sanchez, O. Rabatel, A. Jaillet, S. UNIVERSITE SAVOIE MONT BLANC UNIVERSITE GRENOBLE ALPES CNRS UMR 5204 EDYTEM CHAMBERY FRA IRSTEA GRENOBLE UR ETGR FRA UNIVERSITE GRENOBLE ALPES INP CNRS IRD UMR 5001 IGE SAINT MARTIN D'HERES FRA 2018 application/pdf https://irsteadoc.irstea.fr/cemoa/PUB00060682 Anglais eng http://dx.doi.org/10.3390/rs10040547 https://irsteadoc.irstea.fr/cemoa/PUB00060682 Date de dépôt: 2019-02-28 - Tous les documents et informations contenus dans la base CemOA Publications sont protégés en vertu du droit de propriété intellectuelle, en particulier par le droit d'auteur. La personne consultant la base CemOA Publications peut visualiser, reproduire, ou stocker des copies des publications, à condition que l'information soit seulement pour son usage personnel et non commercial. L'utilisation des travaux universitaires est soumise à autorisation préalable de leurs auteurs. Toute information relative au signalement d'une publication contenue dans CemOA Publications doit inclure la citation bibliographique usuelle : Nom du ou des auteurs, titre et source du document, date et URL de la notice (dc_identifier). 53328 GLACIER METHODE DES ELEMENTS DISCRETS discret element method Article de revue scientifique à comité de lecture 2018 ftcemoa https://doi.org/10.3390/rs10040547 2021-06-29T12:29:37Z Rock glaciers result from the long-term creeping of ice-rich permafrost along mountain slopes. Under warming conditions, deformation is expected to increase, and potential destabilization of those landforms may lead to hazardous phenomena. Monitoring the kinematics of rock glaciers at fine spatial resolution is required to better understand at which rate, where and how they deform. We present here the results of several years of in situ surveys carried out between 2005 and 2015 on the Laurichard rock glacier, an active rock glacier located in the French Alps. Repeated terrestrial laser-scanning (TLS) together with aerial laser-scanning (ALS) and structure-from-motion-multi-view-stereophotogrammetry (SFM-MVS) were used to accurately quantify surface displacement of the Laurichard rock glacier at interannual and pluri-annual scales. Six very high-resolution digital elevation models (DEMs, pixel size < 50 cm) of the rock glacier surface were generated, and their respective quality was assessed. The relative horizontal position accuracy (XY) of the individual DEMs is in general less than 2 cm with a co-registration error on stable areas ranging from 20-50 cm. The vertical accuracy is around 20 cm. The direction and amplitude of surface displacements computed between DEMs are very consistent with independent geodetic field measurements (e. g., DGPS). Using these datasets, local patterns of the Laurichard rock glacier kinematics were quantified, pointing out specific internal (rheological) and external (bed topography) controls. The evolution of the surface velocity shows few changes on the rock glacier's snout for the first years of the observed period, followed by a major acceleration between 2012 and 2015 affecting the upper part of the tongue and the snout. Article in Journal/Newspaper Ice permafrost Irstea Publications et Bases documentaires (Irstea@doc/CemOA) Remote Sensing 10 4 547 |
institution |
Open Polar |
collection |
Irstea Publications et Bases documentaires (Irstea@doc/CemOA) |
op_collection_id |
ftcemoa |
language |
English |
topic |
GLACIER METHODE DES ELEMENTS DISCRETS discret element method |
spellingShingle |
GLACIER METHODE DES ELEMENTS DISCRETS discret element method Bodin, X. Thibert, E. Sanchez, O. Rabatel, A. Jaillet, S. Multi-annual kinematics of an active rock glacier quantified from very high-resolution DEMs: an application-case in the French Alps |
topic_facet |
GLACIER METHODE DES ELEMENTS DISCRETS discret element method |
description |
Rock glaciers result from the long-term creeping of ice-rich permafrost along mountain slopes. Under warming conditions, deformation is expected to increase, and potential destabilization of those landforms may lead to hazardous phenomena. Monitoring the kinematics of rock glaciers at fine spatial resolution is required to better understand at which rate, where and how they deform. We present here the results of several years of in situ surveys carried out between 2005 and 2015 on the Laurichard rock glacier, an active rock glacier located in the French Alps. Repeated terrestrial laser-scanning (TLS) together with aerial laser-scanning (ALS) and structure-from-motion-multi-view-stereophotogrammetry (SFM-MVS) were used to accurately quantify surface displacement of the Laurichard rock glacier at interannual and pluri-annual scales. Six very high-resolution digital elevation models (DEMs, pixel size < 50 cm) of the rock glacier surface were generated, and their respective quality was assessed. The relative horizontal position accuracy (XY) of the individual DEMs is in general less than 2 cm with a co-registration error on stable areas ranging from 20-50 cm. The vertical accuracy is around 20 cm. The direction and amplitude of surface displacements computed between DEMs are very consistent with independent geodetic field measurements (e. g., DGPS). Using these datasets, local patterns of the Laurichard rock glacier kinematics were quantified, pointing out specific internal (rheological) and external (bed topography) controls. The evolution of the surface velocity shows few changes on the rock glacier's snout for the first years of the observed period, followed by a major acceleration between 2012 and 2015 affecting the upper part of the tongue and the snout. |
author2 |
UNIVERSITE SAVOIE MONT BLANC UNIVERSITE GRENOBLE ALPES CNRS UMR 5204 EDYTEM CHAMBERY FRA IRSTEA GRENOBLE UR ETGR FRA UNIVERSITE GRENOBLE ALPES INP CNRS IRD UMR 5001 IGE SAINT MARTIN D'HERES FRA |
format |
Article in Journal/Newspaper |
author |
Bodin, X. Thibert, E. Sanchez, O. Rabatel, A. Jaillet, S. |
author_facet |
Bodin, X. Thibert, E. Sanchez, O. Rabatel, A. Jaillet, S. |
author_sort |
Bodin, X. |
title |
Multi-annual kinematics of an active rock glacier quantified from very high-resolution DEMs: an application-case in the French Alps |
title_short |
Multi-annual kinematics of an active rock glacier quantified from very high-resolution DEMs: an application-case in the French Alps |
title_full |
Multi-annual kinematics of an active rock glacier quantified from very high-resolution DEMs: an application-case in the French Alps |
title_fullStr |
Multi-annual kinematics of an active rock glacier quantified from very high-resolution DEMs: an application-case in the French Alps |
title_full_unstemmed |
Multi-annual kinematics of an active rock glacier quantified from very high-resolution DEMs: an application-case in the French Alps |
title_sort |
multi-annual kinematics of an active rock glacier quantified from very high-resolution dems: an application-case in the french alps |
publishDate |
2018 |
url |
https://irsteadoc.irstea.fr/cemoa/PUB00060682 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
53328 |
op_relation |
http://dx.doi.org/10.3390/rs10040547 https://irsteadoc.irstea.fr/cemoa/PUB00060682 |
op_rights |
Date de dépôt: 2019-02-28 - Tous les documents et informations contenus dans la base CemOA Publications sont protégés en vertu du droit de propriété intellectuelle, en particulier par le droit d'auteur. La personne consultant la base CemOA Publications peut visualiser, reproduire, ou stocker des copies des publications, à condition que l'information soit seulement pour son usage personnel et non commercial. L'utilisation des travaux universitaires est soumise à autorisation préalable de leurs auteurs. Toute information relative au signalement d'une publication contenue dans CemOA Publications doit inclure la citation bibliographique usuelle : Nom du ou des auteurs, titre et source du document, date et URL de la notice (dc_identifier). |
op_doi |
https://doi.org/10.3390/rs10040547 |
container_title |
Remote Sensing |
container_volume |
10 |
container_issue |
4 |
container_start_page |
547 |
_version_ |
1766028200073232384 |