Ground temperature variations in a talus slope influenced by permafrost: a comparison of field observations and model simulations
Variations in surface and near-surface ground temperatures (GST) dominate the evolution of the ground thermal regime over time and represent the upper boundary condition for the subsurface. Focusing on the Lapires talus slope in the south-western part of the Swiss Alps, which partly contains massive...
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2015
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ftdoajarticles:oai:doaj.org/article:b4ed3415140e456f94e1a7e794d0bcce 2023-05-15T16:37:49+02:00 Ground temperature variations in a talus slope influenced by permafrost: a comparison of field observations and model simulations B. Staub A. Marmy C. Hauck C. Hilbich R. Delaloye 2015-02-01T00:00:00Z https://doi.org/10.5194/gh-70-45-2015 https://doaj.org/article/b4ed3415140e456f94e1a7e794d0bcce DE EN FR IT ger eng fre ita Copernicus Publications http://www.geogr-helv.net/70/45/2015/gh-70-45-2015.pdf https://doaj.org/toc/0016-7312 https://doaj.org/toc/2194-8798 0016-7312 2194-8798 doi:10.5194/gh-70-45-2015 https://doaj.org/article/b4ed3415140e456f94e1a7e794d0bcce Geographica Helvetica, Vol 70, Iss 1, Pp 45-62 (2015) Human ecology. Anthropogeography GF1-900 Geography (General) G1-922 Cartography GA101-1776 article 2015 ftdoajarticles https://doi.org/10.5194/gh-70-45-2015 2022-12-31T14:32:40Z Variations in surface and near-surface ground temperatures (GST) dominate the evolution of the ground thermal regime over time and represent the upper boundary condition for the subsurface. Focusing on the Lapires talus slope in the south-western part of the Swiss Alps, which partly contains massive ground ice, and using a joint observational and modelling approach, this study compares and combines observed and simulated GST in the proximity of a borehole. The aim was to determine the applicability of the physically based subsurface model COUP to accurately reproduce spatially heterogeneous GST data and to enhance its reliability for long-term simulations. The reconstruction of GST variations revealed very promising results, even though two-dimensional processes like the convection within the coarse-blocky sediments close to the surface or ascending air circulation throughout the landform ("chimney effect") are not included in the model. For most simulations, the model bias revealed a distinct seasonal pattern mainly related to the simulation of the snow cover. The study shows that, by means of a detailed comparison of GST simulations with ground truth data, the calibration of the upper boundary conditions – which are crucial for modelling the subsurface – could be enhanced. Article in Journal/Newspaper Ice permafrost Directory of Open Access Journals: DOAJ Articles Geographica Helvetica 70 1 45 62 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
German English French Italian |
topic |
Human ecology. Anthropogeography GF1-900 Geography (General) G1-922 Cartography GA101-1776 |
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Human ecology. Anthropogeography GF1-900 Geography (General) G1-922 Cartography GA101-1776 B. Staub A. Marmy C. Hauck C. Hilbich R. Delaloye Ground temperature variations in a talus slope influenced by permafrost: a comparison of field observations and model simulations |
topic_facet |
Human ecology. Anthropogeography GF1-900 Geography (General) G1-922 Cartography GA101-1776 |
description |
Variations in surface and near-surface ground temperatures (GST) dominate the evolution of the ground thermal regime over time and represent the upper boundary condition for the subsurface. Focusing on the Lapires talus slope in the south-western part of the Swiss Alps, which partly contains massive ground ice, and using a joint observational and modelling approach, this study compares and combines observed and simulated GST in the proximity of a borehole. The aim was to determine the applicability of the physically based subsurface model COUP to accurately reproduce spatially heterogeneous GST data and to enhance its reliability for long-term simulations. The reconstruction of GST variations revealed very promising results, even though two-dimensional processes like the convection within the coarse-blocky sediments close to the surface or ascending air circulation throughout the landform ("chimney effect") are not included in the model. For most simulations, the model bias revealed a distinct seasonal pattern mainly related to the simulation of the snow cover. The study shows that, by means of a detailed comparison of GST simulations with ground truth data, the calibration of the upper boundary conditions – which are crucial for modelling the subsurface – could be enhanced. |
format |
Article in Journal/Newspaper |
author |
B. Staub A. Marmy C. Hauck C. Hilbich R. Delaloye |
author_facet |
B. Staub A. Marmy C. Hauck C. Hilbich R. Delaloye |
author_sort |
B. Staub |
title |
Ground temperature variations in a talus slope influenced by permafrost: a comparison of field observations and model simulations |
title_short |
Ground temperature variations in a talus slope influenced by permafrost: a comparison of field observations and model simulations |
title_full |
Ground temperature variations in a talus slope influenced by permafrost: a comparison of field observations and model simulations |
title_fullStr |
Ground temperature variations in a talus slope influenced by permafrost: a comparison of field observations and model simulations |
title_full_unstemmed |
Ground temperature variations in a talus slope influenced by permafrost: a comparison of field observations and model simulations |
title_sort |
ground temperature variations in a talus slope influenced by permafrost: a comparison of field observations and model simulations |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/gh-70-45-2015 https://doaj.org/article/b4ed3415140e456f94e1a7e794d0bcce |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
Geographica Helvetica, Vol 70, Iss 1, Pp 45-62 (2015) |
op_relation |
http://www.geogr-helv.net/70/45/2015/gh-70-45-2015.pdf https://doaj.org/toc/0016-7312 https://doaj.org/toc/2194-8798 0016-7312 2194-8798 doi:10.5194/gh-70-45-2015 https://doaj.org/article/b4ed3415140e456f94e1a7e794d0bcce |
op_doi |
https://doi.org/10.5194/gh-70-45-2015 |
container_title |
Geographica Helvetica |
container_volume |
70 |
container_issue |
1 |
container_start_page |
45 |
op_container_end_page |
62 |
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1766028107687395328 |