Thermal regime of openwork block fields on the mountains Elgåhogna and Sølen, central‐eastern Norway
Abstract Ground temperatures in openwork blocky debris are frequently lower than in bedrock or regolith with a matrix of fine sediment, creating a negative temperature anomaly. Two years of temperature measurements in seven 1‐m‐deep profiles located in central‐eastern Norway showed that mean annual...
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crwiley:10.1002/ppp.607 2024-06-02T08:13:05+00:00 Thermal regime of openwork block fields on the mountains Elgåhogna and Sølen, central‐eastern Norway Juliussen, Håvard Humlum, Ole 2008 http://dx.doi.org/10.1002/ppp.607 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.607 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.607 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Permafrost and Periglacial Processes volume 19, issue 1, page 1-18 ISSN 1045-6740 1099-1530 journal-article 2008 crwiley https://doi.org/10.1002/ppp.607 2024-05-03T12:05:53Z Abstract Ground temperatures in openwork blocky debris are frequently lower than in bedrock or regolith with a matrix of fine sediment, creating a negative temperature anomaly. Two years of temperature measurements in seven 1‐m‐deep profiles located in central‐eastern Norway showed that mean annual ground temperatures were 1.3–2.0°C lower in block fields (felsenmeer) compared with till and bedrock. These data suggest that mountain permafrost can be present in block fields several hundred metres lower than in bedrock and till, providing other conditions remain the same. Better thermal coupling of the ground and the air in winter was responsible for the observed anomaly, probably caused by enhanced conduction through blocks protruding into and through the snow and thereby acting as efficient heat bridges. Convection in the blocky debris, which has been used previously as an explanation of the negative thermal anomaly, was less important than initially presumed. Copyright © 2008 John Wiley & Sons, Ltd. Article in Journal/Newspaper permafrost Permafrost and Periglacial Processes Wiley Online Library Norway Permafrost and Periglacial Processes 19 1 1 18 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Ground temperatures in openwork blocky debris are frequently lower than in bedrock or regolith with a matrix of fine sediment, creating a negative temperature anomaly. Two years of temperature measurements in seven 1‐m‐deep profiles located in central‐eastern Norway showed that mean annual ground temperatures were 1.3–2.0°C lower in block fields (felsenmeer) compared with till and bedrock. These data suggest that mountain permafrost can be present in block fields several hundred metres lower than in bedrock and till, providing other conditions remain the same. Better thermal coupling of the ground and the air in winter was responsible for the observed anomaly, probably caused by enhanced conduction through blocks protruding into and through the snow and thereby acting as efficient heat bridges. Convection in the blocky debris, which has been used previously as an explanation of the negative thermal anomaly, was less important than initially presumed. Copyright © 2008 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Juliussen, Håvard Humlum, Ole |
spellingShingle |
Juliussen, Håvard Humlum, Ole Thermal regime of openwork block fields on the mountains Elgåhogna and Sølen, central‐eastern Norway |
author_facet |
Juliussen, Håvard Humlum, Ole |
author_sort |
Juliussen, Håvard |
title |
Thermal regime of openwork block fields on the mountains Elgåhogna and Sølen, central‐eastern Norway |
title_short |
Thermal regime of openwork block fields on the mountains Elgåhogna and Sølen, central‐eastern Norway |
title_full |
Thermal regime of openwork block fields on the mountains Elgåhogna and Sølen, central‐eastern Norway |
title_fullStr |
Thermal regime of openwork block fields on the mountains Elgåhogna and Sølen, central‐eastern Norway |
title_full_unstemmed |
Thermal regime of openwork block fields on the mountains Elgåhogna and Sølen, central‐eastern Norway |
title_sort |
thermal regime of openwork block fields on the mountains elgåhogna and sølen, central‐eastern norway |
publisher |
Wiley |
publishDate |
2008 |
url |
http://dx.doi.org/10.1002/ppp.607 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.607 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.607 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
permafrost Permafrost and Periglacial Processes |
genre_facet |
permafrost Permafrost and Periglacial Processes |
op_source |
Permafrost and Periglacial Processes volume 19, issue 1, page 1-18 ISSN 1045-6740 1099-1530 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ppp.607 |
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Permafrost and Periglacial Processes |
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19 |
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1 |
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1 |
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18 |
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