Advective heat transport in frozen rock clefts: Conceptual model, laboratory experiments and numerical simulation
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...
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ftunivzuerich:oai:www.zora.uzh.ch:58874 2024-09-15T18:11:35+00:00 Advective heat transport in frozen rock clefts: Conceptual model, laboratory experiments and numerical simulation Hasler, A Gruber, S Font, M Dubois, A 2011-12-13 application/pdf https://www.zora.uzh.ch/id/eprint/58874/ https://www.zora.uzh.ch/id/eprint/58874/1/2011_Hasler_etal.pdf https://doi.org/10.5167/uzh-58874 https://doi.org/10.1002/ppp.737 eng eng Wiley https://www.zora.uzh.ch/id/eprint/58874/1/2011_Hasler_etal.pdf doi:10.5167/uzh-58874 doi:10.1002/ppp.737 urn:issn:1045-6740 info:eu-repo/semantics/restrictedAccess Hasler, A; Gruber, S; Font, M; Dubois, A (2011). Advective heat transport in frozen rock clefts: Conceptual model, laboratory experiments and numerical simulation. Permafrost and Periglacial Processes, 22(4):378-389. Institute of Geography 910 Geography & travel Earth-Surface Processes Journal Article PeerReviewed info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2011 ftunivzuerich https://doi.org/10.5167/uzh-5887410.1002/ppp.737 2024-08-14T00:23:55Z 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 University of Zurich (UZH): ZORA (Zurich Open Repository and Archive |
institution |
Open Polar |
collection |
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive |
op_collection_id |
ftunivzuerich |
language |
English |
topic |
Institute of Geography 910 Geography & travel Earth-Surface Processes |
spellingShingle |
Institute of Geography 910 Geography & travel Earth-Surface Processes Hasler, A Gruber, S Font, M Dubois, A Advective heat transport in frozen rock clefts: Conceptual model, laboratory experiments and numerical simulation |
topic_facet |
Institute of Geography 910 Geography & travel Earth-Surface Processes |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Hasler, A Gruber, S Font, M Dubois, A |
author_facet |
Hasler, A Gruber, S Font, M Dubois, A |
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 |
Wiley |
publishDate |
2011 |
url |
https://www.zora.uzh.ch/id/eprint/58874/ https://www.zora.uzh.ch/id/eprint/58874/1/2011_Hasler_etal.pdf https://doi.org/10.5167/uzh-58874 https://doi.org/10.1002/ppp.737 |
genre |
Ice permafrost Permafrost and Periglacial Processes |
genre_facet |
Ice permafrost Permafrost and Periglacial Processes |
op_source |
Hasler, A; Gruber, S; Font, M; Dubois, A (2011). Advective heat transport in frozen rock clefts: Conceptual model, laboratory experiments and numerical simulation. Permafrost and Periglacial Processes, 22(4):378-389. |
op_relation |
https://www.zora.uzh.ch/id/eprint/58874/1/2011_Hasler_etal.pdf doi:10.5167/uzh-58874 doi:10.1002/ppp.737 urn:issn:1045-6740 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.5167/uzh-5887410.1002/ppp.737 |
_version_ |
1810449166813364224 |