Advective Heat Transport in Frozen Rock Clefts - Conceptual Model, Laboratory Experiments and Numerical Simulation
International audience Advective heat transported by water percolating into discontinuities in frozen ground can rapidly increase temperatures at depth because it provides a thermal shortcut between the atmosphere and the subsurface. Here, we develop a conceptual model that incorporates the main hea...
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Online Access: | https://doi.org/10.1002/ppp.737 https://hal.archives-ouvertes.fr/hal-00679024 |
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fttriple:oai:gotriple.eu:10670/1.c2dv34 2023-05-15T16:37:05+02:00 Advective Heat Transport in Frozen Rock Clefts - Conceptual Model, Laboratory Experiments and Numerical Simulation Hasler, A. Gruber, S. Font, Marianne Dubois, André Glaciology, Geomorphodynamics & Geochronology Group Universität Zürich Zürich = University of Zurich (UZH) Morphodynamique Continentale et Côtière (M2C) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rouen Normandie (UNIROUEN) Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS) 2011-12-13 https://doi.org/10.1002/ppp.737 https://hal.archives-ouvertes.fr/hal-00679024 en eng HAL CCSD Wiley hal-00679024 doi:10.1002/ppp.737 10670/1.c2dv34 https://hal.archives-ouvertes.fr/hal-00679024 undefined Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 1045-6740 EISSN: 1099-1530 Permafrost and Periglacial Processes Permafrost and Periglacial Processes, Wiley, 2011, 22, pp.378-389. ⟨10.1002/ppp.737⟩ rockfall numerical modelling climate change permafrost bedrock conductive heat transfer advective heat transport laboratory experiment geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2011 fttriple https://doi.org/10.1002/ppp.737 2023-01-22T17:38:32Z International audience Advective heat transported by water percolating into discontinuities in frozen ground can rapidly increase temperatures at depth because it provides a thermal shortcut between the atmosphere and the subsurface. Here, we develop a conceptual model that incorporates the main heat-exchange processes in a rock cleft. Laboratory experiments and numerical simulations based on the model indicate that latent heat release due to initial ice aggradation can rapidly warm cold bedrock and precondition it for later thermal erosion of cleft ice by advected sensible heat. The timing and duration of water percolation both affect the ice-level change if initial aggradation and subsequent erosion are of the same order of magnitude. The surplus advected heat is absorbed by cleft ice loss and runoff from the cleft so that this energy is not directly detectable in ground temperature records. Our findings suggest that thawing-related rockfall is possible even in cold permafrost if meltwater production and flow characteristics change significantly. Advective warming could rapidly affect failure planes beneath large rock masses and failure events could therefore differ greatly from common magnitude reaction-time relations. Article in Journal/Newspaper Ice permafrost Permafrost and Periglacial Processes Unknown Permafrost and Periglacial Processes 22 4 378 389 |
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Unknown |
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English |
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rockfall numerical modelling climate change permafrost bedrock conductive heat transfer advective heat transport laboratory experiment geo envir |
spellingShingle |
rockfall numerical modelling climate change permafrost bedrock conductive heat transfer advective heat transport laboratory experiment geo envir Hasler, A. Gruber, S. Font, Marianne Dubois, André Advective Heat Transport in Frozen Rock Clefts - Conceptual Model, Laboratory Experiments and Numerical Simulation |
topic_facet |
rockfall numerical modelling climate change permafrost bedrock conductive heat transfer advective heat transport laboratory experiment geo envir |
description |
International audience Advective heat transported by water percolating into discontinuities in frozen ground can rapidly increase temperatures at depth because it provides a thermal shortcut between the atmosphere and the subsurface. Here, we develop a conceptual model that incorporates the main heat-exchange processes in a rock cleft. Laboratory experiments and numerical simulations based on the model indicate that latent heat release due to initial ice aggradation can rapidly warm cold bedrock and precondition it for later thermal erosion of cleft ice by advected sensible heat. The timing and duration of water percolation both affect the ice-level change if initial aggradation and subsequent erosion are of the same order of magnitude. The surplus advected heat is absorbed by cleft ice loss and runoff from the cleft so that this energy is not directly detectable in ground temperature records. Our findings suggest that thawing-related rockfall is possible even in cold permafrost if meltwater production and flow characteristics change significantly. Advective warming could rapidly affect failure planes beneath large rock masses and failure events could therefore differ greatly from common magnitude reaction-time relations. |
author2 |
Glaciology, Geomorphodynamics & Geochronology Group Universität Zürich Zürich = University of Zurich (UZH) Morphodynamique Continentale et Côtière (M2C) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rouen Normandie (UNIROUEN) Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Hasler, A. Gruber, S. Font, Marianne Dubois, André |
author_facet |
Hasler, A. Gruber, S. Font, Marianne Dubois, André |
author_sort |
Hasler, A. |
title |
Advective Heat Transport in Frozen Rock Clefts - Conceptual Model, Laboratory Experiments and Numerical Simulation |
title_short |
Advective Heat Transport in Frozen Rock Clefts - Conceptual Model, Laboratory Experiments and Numerical Simulation |
title_full |
Advective Heat Transport in Frozen Rock Clefts - Conceptual Model, Laboratory Experiments and Numerical Simulation |
title_fullStr |
Advective Heat Transport in Frozen Rock Clefts - Conceptual Model, Laboratory Experiments and Numerical Simulation |
title_full_unstemmed |
Advective Heat Transport in Frozen Rock Clefts - Conceptual Model, Laboratory Experiments and Numerical Simulation |
title_sort |
advective heat transport in frozen rock clefts - conceptual model, laboratory experiments and numerical simulation |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://doi.org/10.1002/ppp.737 https://hal.archives-ouvertes.fr/hal-00679024 |
genre |
Ice permafrost Permafrost and Periglacial Processes |
genre_facet |
Ice permafrost Permafrost and Periglacial Processes |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 1045-6740 EISSN: 1099-1530 Permafrost and Periglacial Processes Permafrost and Periglacial Processes, Wiley, 2011, 22, pp.378-389. ⟨10.1002/ppp.737⟩ |
op_relation |
hal-00679024 doi:10.1002/ppp.737 10670/1.c2dv34 https://hal.archives-ouvertes.fr/hal-00679024 |
op_rights |
undefined |
op_doi |
https://doi.org/10.1002/ppp.737 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
22 |
container_issue |
4 |
container_start_page |
378 |
op_container_end_page |
389 |
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