Thermal diffusivity variability in alpine permafrost rock walls
Permafrost degradation has been hypothesized as being one of the main causes of rockfalls and rock wall instability in the recent past in high mountain areas. Ongoing rock wall permafrost evolution remains poorly understood because of the lack of systematic measurements; models are often validated a...
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ftunivzuerich:oai:www.zora.uzh.ch:3098 2023-05-15T17:56:48+02:00 Thermal diffusivity variability in alpine permafrost rock walls Pogliotti, P Cremonese, E Morra di Cella, U Gruber, S Giardino, M 2008-07-03 application/pdf https://www.zora.uzh.ch/id/eprint/3098/ https://www.zora.uzh.ch/id/eprint/3098/9/Pogliotti_European_Alpine_Rockwalls_2008V.pdf http://uspermafrost.org/meetings/nicop/proceedings.html https://doi.org/10.5167/uzh-3098 eng eng https://www.zora.uzh.ch/id/eprint/3098/9/Pogliotti_European_Alpine_Rockwalls_2008V.pdf doi:10.5167/uzh-3098 urn:isbn:978-0-9800179-3-9 info:eu-repo/semantics/openAccess Pogliotti, P; Cremonese, E; Morra di Cella, U; Gruber, S; Giardino, M (2008). Thermal diffusivity variability in alpine permafrost rock walls. In: 9th International Conference on Permafrost, Fairbanks, Alaska, 29 June 2008 - 3 July 2008, 1427-1432. Institute of Geography 910 Geography & travel Conference or Workshop Item PeerReviewed info:eu-repo/semantics/conferenceObject 2008 ftunivzuerich https://doi.org/10.5167/uzh-3098 2022-11-29T20:15:48Z Permafrost degradation has been hypothesized as being one of the main causes of rockfalls and rock wall instability in the recent past in high mountain areas. Ongoing rock wall permafrost evolution remains poorly understood because of the lack of systematic measurements; models are often validated and driven by few existing instrumented sites. In rock wall subsurface temperature modeling, thermal diffusivity (κ) is one of the main parameters to be considered. In this study, thermal diffusivity data series were inferred from rock temperature data in order to understand their annual variation, their distribution in different temperature ranges, and their relation to atmospheric conditions. A harmonic analysis was performed to define amplitude and phase of the daily temperature waves at different depths by means of a least square minimizing optimization procedure. The analysis conducted shows that changes in κ values are influenced by different factors such as depth, season, rock temperature, aspect, and snowfall. Conference Object permafrost 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 |
spellingShingle |
Institute of Geography 910 Geography & travel Pogliotti, P Cremonese, E Morra di Cella, U Gruber, S Giardino, M Thermal diffusivity variability in alpine permafrost rock walls |
topic_facet |
Institute of Geography 910 Geography & travel |
description |
Permafrost degradation has been hypothesized as being one of the main causes of rockfalls and rock wall instability in the recent past in high mountain areas. Ongoing rock wall permafrost evolution remains poorly understood because of the lack of systematic measurements; models are often validated and driven by few existing instrumented sites. In rock wall subsurface temperature modeling, thermal diffusivity (κ) is one of the main parameters to be considered. In this study, thermal diffusivity data series were inferred from rock temperature data in order to understand their annual variation, their distribution in different temperature ranges, and their relation to atmospheric conditions. A harmonic analysis was performed to define amplitude and phase of the daily temperature waves at different depths by means of a least square minimizing optimization procedure. The analysis conducted shows that changes in κ values are influenced by different factors such as depth, season, rock temperature, aspect, and snowfall. |
format |
Conference Object |
author |
Pogliotti, P Cremonese, E Morra di Cella, U Gruber, S Giardino, M |
author_facet |
Pogliotti, P Cremonese, E Morra di Cella, U Gruber, S Giardino, M |
author_sort |
Pogliotti, P |
title |
Thermal diffusivity variability in alpine permafrost rock walls |
title_short |
Thermal diffusivity variability in alpine permafrost rock walls |
title_full |
Thermal diffusivity variability in alpine permafrost rock walls |
title_fullStr |
Thermal diffusivity variability in alpine permafrost rock walls |
title_full_unstemmed |
Thermal diffusivity variability in alpine permafrost rock walls |
title_sort |
thermal diffusivity variability in alpine permafrost rock walls |
publishDate |
2008 |
url |
https://www.zora.uzh.ch/id/eprint/3098/ https://www.zora.uzh.ch/id/eprint/3098/9/Pogliotti_European_Alpine_Rockwalls_2008V.pdf http://uspermafrost.org/meetings/nicop/proceedings.html https://doi.org/10.5167/uzh-3098 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Pogliotti, P; Cremonese, E; Morra di Cella, U; Gruber, S; Giardino, M (2008). Thermal diffusivity variability in alpine permafrost rock walls. In: 9th International Conference on Permafrost, Fairbanks, Alaska, 29 June 2008 - 3 July 2008, 1427-1432. |
op_relation |
https://www.zora.uzh.ch/id/eprint/3098/9/Pogliotti_European_Alpine_Rockwalls_2008V.pdf doi:10.5167/uzh-3098 urn:isbn:978-0-9800179-3-9 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5167/uzh-3098 |
_version_ |
1766165082383843328 |