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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ftinsu:oai:HAL:hal-00679024v1 2024-04-14T08:12:56+00:00 Advective Heat Transport in Frozen Rock Clefts - Conceptual Model, Laboratory Experiments and Numerical Simulation Hasler, A. Gruber, S. Font, Marianne Dubois, Anthony 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://hal.science/hal-00679024 https://doi.org/10.1002/ppp.737 en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1002/ppp.737 hal-00679024 https://hal.science/hal-00679024 doi:10.1002/ppp.737 ISSN: 1045-6740 EISSN: 1099-1530 Permafrost and Periglacial Processes https://hal.science/hal-00679024 Permafrost and Periglacial Processes, 2011, 22, pp.378-389. ⟨10.1002/ppp.737⟩ rockfall numerical modelling laboratory experiment advective heat transport conductive heat transfer bedrock permafrost climate change [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2011 ftinsu https://doi.org/10.1002/ppp.737 2024-03-21T16:58:32Z 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 Institut national des sciences de l'Univers: HAL-INSU Permafrost and Periglacial Processes 22 4 378 389 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
rockfall numerical modelling laboratory experiment advective heat transport conductive heat transfer bedrock permafrost climate change [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
rockfall numerical modelling laboratory experiment advective heat transport conductive heat transfer bedrock permafrost climate change [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes Hasler, A. Gruber, S. Font, Marianne Dubois, Anthony Advective Heat Transport in Frozen Rock Clefts - Conceptual Model, Laboratory Experiments and Numerical Simulation |
topic_facet |
rockfall numerical modelling laboratory experiment advective heat transport conductive heat transfer bedrock permafrost climate change [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes |
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, Anthony |
author_facet |
Hasler, A. Gruber, S. Font, Marianne Dubois, Anthony |
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://hal.science/hal-00679024 https://doi.org/10.1002/ppp.737 |
genre |
Ice permafrost Permafrost and Periglacial Processes |
genre_facet |
Ice permafrost Permafrost and Periglacial Processes |
op_source |
ISSN: 1045-6740 EISSN: 1099-1530 Permafrost and Periglacial Processes https://hal.science/hal-00679024 Permafrost and Periglacial Processes, 2011, 22, pp.378-389. ⟨10.1002/ppp.737⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/ppp.737 hal-00679024 https://hal.science/hal-00679024 doi:10.1002/ppp.737 |
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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1796310777907380224 |