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| Titel |
Past, present and future thermal conditions in mountain permafrost in northern Norway |
| VerfasserIn |
Bernd Etzelmueller, Herman Farbrot, Ketil Isaksen, Thomas V. Schuler, Hanne H. Christiansen, Rasmus Benestad |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250034370
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| Zusammenfassung |
| The Norwegian funded IPYproject ‘Permafrost Observatory Project: A Contribution to the Thermal State of Permafrost in Norway and Svalbard’ (TSP NORWAY) is a part of the international IPY full project ‘Permafrost Observatory Project: A Contribution to the Thermal State of Permafrost (TSP)’. TSP will obtain a “snapshot” of the permafrost environments as a benchmark against which to assess past and future changes by making standardized temperature measurements in existing and new boreholes throughout the World’s permafrost regions. During the project, boreholes were drilled in several locations along the altitudinal lower limit of mountain permafrost in northern Norway. The ground temperature data were used to calibrate a transient heat flow model, and subsequently forced with historical air temperature data records and an empirical-statistical downscaled ensemble of time series of air temperature for the 21st Century . The presentation discusses temperature changes since the end of the Little Ice Age, and discusses thermal responses in relation to ground characteristics and snow cover. Results show that the mountain permafrost in northern Norway is warm as it is only a few degrees below 0°C, which makes it very vulnerable to warming. The climate scenarios are used as model forcing to evaluate possible permafrost responses due to anticipated climate warming. The study clearly demonstrates the different thermal responses dependant on sediment cover, ice content and snow conditions. |
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