CryoGRID 1.0: Permafrost Distribution in Norway estimated by a Spatial Numerical Model
ABSTRACT CryoGRID 1.0 provides an equilibrium model of permafrost distribution in Norway at a spatial resolution of 1 km 2 . The approach was forced with gridded data on daily air temperature and snow cover. Ground thermal properties for different bedrock types and sediment covers were derived from...
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crwiley:10.1002/ppp.1765 2024-09-15T18:11:29+00:00 CryoGRID 1.0: Permafrost Distribution in Norway estimated by a Spatial Numerical Model Gisnås, K. Etzelmüller, B. Farbrot, H. Schuler, T. V. Westermann, S. Norwegian Research Council 2013 http://dx.doi.org/10.1002/ppp.1765 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.1765 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.1765 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Permafrost and Periglacial Processes volume 24, issue 1, page 2-19 ISSN 1045-6740 1099-1530 journal-article 2013 crwiley https://doi.org/10.1002/ppp.1765 2024-08-27T04:31:36Z ABSTRACT CryoGRID 1.0 provides an equilibrium model of permafrost distribution in Norway at a spatial resolution of 1 km 2 . The approach was forced with gridded data on daily air temperature and snow cover. Ground thermal properties for different bedrock types and sediment covers were derived from surveys and geological maps to yield distributions of thermal conductivity, heat capacity and water content. The distribution of blockfields was derived from satellite images adapting a newly developed classification scheme. The model was evaluated using measured ground surface and ground temperatures, yielding a realistic description of the permafrost distribution in mainland Norway. The model results show that permafrost underlies sites mainly with exposed bedrock or covered by coarse‐grained sediments, such as blockfields and coarse tills. In northern Norway, palsa mires are abundant and organic material and vegetation strongly influence the ground thermal regime. Modelling suggests that permafrost in equilibrium with the 1981–2010 climate presently underlies between 6.1 per cent and 6.4 per cent of the total area of mainland Norway, an area significantly smaller than that modelled for the Little Ice Age climate (14%). CryoGRID 1.0 was subsequently forced using output from a regional climate model for the 2071–2100 period, which suggests that severe permafrost degradation will occur, leaving permafrost beneath an area of just 0.2 per cent of mainland Norway. Copyright © 2013 John Wiley & Sons, Ltd. Article in Journal/Newspaper Ice Northern Norway palsa permafrost Permafrost and Periglacial Processes Wiley Online Library Permafrost and Periglacial Processes 24 1 2 19 |
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English |
description |
ABSTRACT CryoGRID 1.0 provides an equilibrium model of permafrost distribution in Norway at a spatial resolution of 1 km 2 . The approach was forced with gridded data on daily air temperature and snow cover. Ground thermal properties for different bedrock types and sediment covers were derived from surveys and geological maps to yield distributions of thermal conductivity, heat capacity and water content. The distribution of blockfields was derived from satellite images adapting a newly developed classification scheme. The model was evaluated using measured ground surface and ground temperatures, yielding a realistic description of the permafrost distribution in mainland Norway. The model results show that permafrost underlies sites mainly with exposed bedrock or covered by coarse‐grained sediments, such as blockfields and coarse tills. In northern Norway, palsa mires are abundant and organic material and vegetation strongly influence the ground thermal regime. Modelling suggests that permafrost in equilibrium with the 1981–2010 climate presently underlies between 6.1 per cent and 6.4 per cent of the total area of mainland Norway, an area significantly smaller than that modelled for the Little Ice Age climate (14%). CryoGRID 1.0 was subsequently forced using output from a regional climate model for the 2071–2100 period, which suggests that severe permafrost degradation will occur, leaving permafrost beneath an area of just 0.2 per cent of mainland Norway. Copyright © 2013 John Wiley & Sons, Ltd. |
author2 |
Norwegian Research Council |
format |
Article in Journal/Newspaper |
author |
Gisnås, K. Etzelmüller, B. Farbrot, H. Schuler, T. V. Westermann, S. |
spellingShingle |
Gisnås, K. Etzelmüller, B. Farbrot, H. Schuler, T. V. Westermann, S. CryoGRID 1.0: Permafrost Distribution in Norway estimated by a Spatial Numerical Model |
author_facet |
Gisnås, K. Etzelmüller, B. Farbrot, H. Schuler, T. V. Westermann, S. |
author_sort |
Gisnås, K. |
title |
CryoGRID 1.0: Permafrost Distribution in Norway estimated by a Spatial Numerical Model |
title_short |
CryoGRID 1.0: Permafrost Distribution in Norway estimated by a Spatial Numerical Model |
title_full |
CryoGRID 1.0: Permafrost Distribution in Norway estimated by a Spatial Numerical Model |
title_fullStr |
CryoGRID 1.0: Permafrost Distribution in Norway estimated by a Spatial Numerical Model |
title_full_unstemmed |
CryoGRID 1.0: Permafrost Distribution in Norway estimated by a Spatial Numerical Model |
title_sort |
cryogrid 1.0: permafrost distribution in norway estimated by a spatial numerical model |
publisher |
Wiley |
publishDate |
2013 |
url |
http://dx.doi.org/10.1002/ppp.1765 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.1765 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.1765 |
genre |
Ice Northern Norway palsa permafrost Permafrost and Periglacial Processes |
genre_facet |
Ice Northern Norway palsa permafrost Permafrost and Periglacial Processes |
op_source |
Permafrost and Periglacial Processes volume 24, issue 1, page 2-19 ISSN 1045-6740 1099-1530 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ppp.1765 |
container_title |
Permafrost and Periglacial Processes |
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24 |
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1 |
container_start_page |
2 |
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19 |
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1810449080347787264 |