Influence of different digital terrain models (DTMs) on alpine permafrost modeling
Abstract The thawing of alpine permafrost due to changes in atmospheric conditions can have a severe impact, e.g., on the stability of rock walls. The energy balance model, PERMEBAL, was developed in order to simulate the changes and distribution of ground surface temperature (GST) in complex high-m...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.547.3330 2023-05-15T17:57:10+02:00 Influence of different digital terrain models (DTMs) on alpine permafrost modeling Nadine Salzmann Stephan Gruber Marco Hugentobler Martin Hoelzle The Pennsylvania State University CiteSeerX Archives 2004 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.547.3330 http://www.geo.unizh.ch/~stgruber/pubs/salzmann_2006-ema.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.547.3330 http://www.geo.unizh.ch/~stgruber/pubs/salzmann_2006-ema.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.geo.unizh.ch/~stgruber/pubs/salzmann_2006-ema.pdf text 2004 ftciteseerx 2016-01-08T11:20:53Z Abstract The thawing of alpine permafrost due to changes in atmospheric conditions can have a severe impact, e.g., on the stability of rock walls. The energy balance model, PERMEBAL, was developed in order to simulate the changes and distribution of ground surface temperature (GST) in complex high-mountain topography. In such environments, the occurrence of permafrost depends greatly on the topogra-phy, and thus, the digital terrain model (DTM) is an important input of PERMEBAL. This study investigates the influence of the DTM on the modeling of the GST. For this purpose, PERMEBALwas run with six different DTMs. Five of the six DTMs are based on the same base data, but were generated using different interpolators. To ensure that only the topo-graphic effect on the GST is calculated, the snow module was turned off and uniform conditions were assumed for the whole test area. The analyses showed that the majority of the deviations between the different model outputs related to a reference DTM had only small differences of up to 1 K, and only a few pixels deviated more than 1 K. However, we also observed that the use of different interpolators for the generation of a DTM can result in large deviations of the model output. These deviations were mainly found at topographically complex locations such as ridges and foot of slopes. Text permafrost Unknown |
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English |
description |
Abstract The thawing of alpine permafrost due to changes in atmospheric conditions can have a severe impact, e.g., on the stability of rock walls. The energy balance model, PERMEBAL, was developed in order to simulate the changes and distribution of ground surface temperature (GST) in complex high-mountain topography. In such environments, the occurrence of permafrost depends greatly on the topogra-phy, and thus, the digital terrain model (DTM) is an important input of PERMEBAL. This study investigates the influence of the DTM on the modeling of the GST. For this purpose, PERMEBALwas run with six different DTMs. Five of the six DTMs are based on the same base data, but were generated using different interpolators. To ensure that only the topo-graphic effect on the GST is calculated, the snow module was turned off and uniform conditions were assumed for the whole test area. The analyses showed that the majority of the deviations between the different model outputs related to a reference DTM had only small differences of up to 1 K, and only a few pixels deviated more than 1 K. However, we also observed that the use of different interpolators for the generation of a DTM can result in large deviations of the model output. These deviations were mainly found at topographically complex locations such as ridges and foot of slopes. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Nadine Salzmann Stephan Gruber Marco Hugentobler Martin Hoelzle |
spellingShingle |
Nadine Salzmann Stephan Gruber Marco Hugentobler Martin Hoelzle Influence of different digital terrain models (DTMs) on alpine permafrost modeling |
author_facet |
Nadine Salzmann Stephan Gruber Marco Hugentobler Martin Hoelzle |
author_sort |
Nadine Salzmann |
title |
Influence of different digital terrain models (DTMs) on alpine permafrost modeling |
title_short |
Influence of different digital terrain models (DTMs) on alpine permafrost modeling |
title_full |
Influence of different digital terrain models (DTMs) on alpine permafrost modeling |
title_fullStr |
Influence of different digital terrain models (DTMs) on alpine permafrost modeling |
title_full_unstemmed |
Influence of different digital terrain models (DTMs) on alpine permafrost modeling |
title_sort |
influence of different digital terrain models (dtms) on alpine permafrost modeling |
publishDate |
2004 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.547.3330 http://www.geo.unizh.ch/~stgruber/pubs/salzmann_2006-ema.pdf |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
http://www.geo.unizh.ch/~stgruber/pubs/salzmann_2006-ema.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.547.3330 http://www.geo.unizh.ch/~stgruber/pubs/salzmann_2006-ema.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766165550499627008 |