The influence of surface characteristics, topography and continentality on mountain permafrost in British Columbia
Thermal and surface offsets describe mean annual ground temperature relative to mean annual air temperature, and for permafrost modelling they are often predicted as a function of surface characteristics and topography. As macroclimatic conditions influence the effectiveness of the underlying proces...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00016452 2023-05-15T17:56:41+02:00 The influence of surface characteristics, topography and continentality on mountain permafrost in British Columbia Hasler, A. Geertsema, M. Foord, V. Gruber, S. Noetzli, J. 2015-05 electronic https://doi.org/10.5194/tc-9-1025-2015 https://noa.gwlb.de/receive/cop_mods_00016452 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00016407/tc-9-1025-2015.pdf https://tc.copernicus.org/articles/9/1025/2015/tc-9-1025-2015.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-9-1025-2015 https://noa.gwlb.de/receive/cop_mods_00016452 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00016407/tc-9-1025-2015.pdf https://tc.copernicus.org/articles/9/1025/2015/tc-9-1025-2015.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2015 ftnonlinearchiv https://doi.org/10.5194/tc-9-1025-2015 2022-02-08T22:54:09Z Thermal and surface offsets describe mean annual ground temperature relative to mean annual air temperature, and for permafrost modelling they are often predicted as a function of surface characteristics and topography. As macroclimatic conditions influence the effectiveness of the underlying processes, knowledge of surface- and topography-specific offsets is not easily transferable between regions, limiting the applicability of empirical permafrost distribution models over areas with strong macroclimatic gradients. In this paper we describe surface and thermal offsets derived from distributed measurements at seven field sites in British Columbia. Key findings are (i) a surprisingly small variation of the surface offsets between different surface types; (ii) small thermal offsets at all sites (excluding wetlands and peat); (iii) a clear influence of the micro-topography at wind exposed sites (snow-cover erosion); (iv) a north–south difference of the surface offset of 4 °C in vertical bedrock and of 1.5–3 °C on open (no canopy) gentle slopes; (v) only small macroclimatic differences possibly caused by the inverse influence of snow cover and annual air temperature amplitude. These findings suggest that topoclimatic factors strongly influence the mountain permafrost distribution in British Columbia. Article in Journal/Newspaper permafrost The Cryosphere Niedersächsisches Online-Archiv NOA The Cryosphere 9 3 1025 1038 |
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article Verlagsveröffentlichung Hasler, A. Geertsema, M. Foord, V. Gruber, S. Noetzli, J. The influence of surface characteristics, topography and continentality on mountain permafrost in British Columbia |
topic_facet |
article Verlagsveröffentlichung |
description |
Thermal and surface offsets describe mean annual ground temperature relative to mean annual air temperature, and for permafrost modelling they are often predicted as a function of surface characteristics and topography. As macroclimatic conditions influence the effectiveness of the underlying processes, knowledge of surface- and topography-specific offsets is not easily transferable between regions, limiting the applicability of empirical permafrost distribution models over areas with strong macroclimatic gradients. In this paper we describe surface and thermal offsets derived from distributed measurements at seven field sites in British Columbia. Key findings are (i) a surprisingly small variation of the surface offsets between different surface types; (ii) small thermal offsets at all sites (excluding wetlands and peat); (iii) a clear influence of the micro-topography at wind exposed sites (snow-cover erosion); (iv) a north–south difference of the surface offset of 4 °C in vertical bedrock and of 1.5–3 °C on open (no canopy) gentle slopes; (v) only small macroclimatic differences possibly caused by the inverse influence of snow cover and annual air temperature amplitude. These findings suggest that topoclimatic factors strongly influence the mountain permafrost distribution in British Columbia. |
format |
Article in Journal/Newspaper |
author |
Hasler, A. Geertsema, M. Foord, V. Gruber, S. Noetzli, J. |
author_facet |
Hasler, A. Geertsema, M. Foord, V. Gruber, S. Noetzli, J. |
author_sort |
Hasler, A. |
title |
The influence of surface characteristics, topography and continentality on mountain permafrost in British Columbia |
title_short |
The influence of surface characteristics, topography and continentality on mountain permafrost in British Columbia |
title_full |
The influence of surface characteristics, topography and continentality on mountain permafrost in British Columbia |
title_fullStr |
The influence of surface characteristics, topography and continentality on mountain permafrost in British Columbia |
title_full_unstemmed |
The influence of surface characteristics, topography and continentality on mountain permafrost in British Columbia |
title_sort |
influence of surface characteristics, topography and continentality on mountain permafrost in british columbia |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/tc-9-1025-2015 https://noa.gwlb.de/receive/cop_mods_00016452 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00016407/tc-9-1025-2015.pdf https://tc.copernicus.org/articles/9/1025/2015/tc-9-1025-2015.pdf |
genre |
permafrost The Cryosphere |
genre_facet |
permafrost The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-9-1025-2015 https://noa.gwlb.de/receive/cop_mods_00016452 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00016407/tc-9-1025-2015.pdf https://tc.copernicus.org/articles/9/1025/2015/tc-9-1025-2015.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-9-1025-2015 |
container_title |
The Cryosphere |
container_volume |
9 |
container_issue |
3 |
container_start_page |
1025 |
op_container_end_page |
1038 |
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1766164941254950912 |