Using relict rockglaciers in GIS-based modelling to reconstruct Younger Dryas permafrost distribution patterns in the Err-Julier area, Swiss Alp
Differences in mean annual air temperature between the Younger Dryas period and today were estimated at the fronts of 32 relict rockglaciers in the Err-Julier area, eastern Swiss Alps. The analyses were based on a case-by-case calculation of direct incoming solar radiation and mean annual air temper...
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2001
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ftunivzuerich:oai:www.zora.uzh.ch:63452 2024-05-19T07:46:59+00:00 Using relict rockglaciers in GIS-based modelling to reconstruct Younger Dryas permafrost distribution patterns in the Err-Julier area, Swiss Alp Frauenfelder, Regula Haeberli, Wilfried Hoelzle, Martin Maisch, Max 2001 application/pdf https://www.zora.uzh.ch/id/eprint/63452/ https://www.zora.uzh.ch/id/eprint/63452/1/Frauenfelder_etal_2001_using_relict.pdf https://doi.org/10.5167/uzh-63452 https://doi.org/10.1080/00291950152746522 eng eng Taylor & Francis https://www.zora.uzh.ch/id/eprint/63452/1/Frauenfelder_etal_2001_using_relict.pdf doi:10.5167/uzh-63452 doi:10.1080/00291950152746522 urn:issn:0029-1951 info:eu-repo/semantics/restrictedAccess Frauenfelder, Regula; Haeberli, Wilfried; Hoelzle, Martin; Maisch, Max (2001). Using relict rockglaciers in GIS-based modelling to reconstruct Younger Dryas permafrost distribution patterns in the Err-Julier area, Swiss Alp. Norsk Geografisk Tidsskrift - Norwegian Journal of Geography, 55(4):195-202. Institute of Geography 910 Geography & travel Geography Planning and Development General Earth and Planetary Sciences Journal Article PeerReviewed info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2001 ftunivzuerich https://doi.org/10.5167/uzh-6345210.1080/00291950152746522 2024-04-24T00:24:42Z Differences in mean annual air temperature between the Younger Dryas period and today were estimated at the fronts of 32 relict rockglaciers in the Err-Julier area, eastern Swiss Alps. The analyses were based on a case-by-case calculation of direct incoming solar radiation and mean annual air temperature using a digital elevation model (DEM) and meteo data of recent years. Our results suggest that mean annual air temperature during the Younger Dryas was lowered by c. 3°C to 4°C, and that the lower limit of permafrost occurrence was depressed considerably more than glacier equilibrium lines. This indicates strongly reduced precipitation (30% to 40% reduction) and much larger abundance of mountain permafrost at that time. A model simulation of the corresponding spatial permafrost distribution during the Younger Dryas indicates that glaciers in the study area were mostly surrounded by permafrost at that time and probably had a polythermal structure of englacial temperatures. Article in Journal/Newspaper permafrost University of Zurich (UZH): ZORA (Zurich Open Repository and Archive |
institution |
Open Polar |
collection |
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive |
op_collection_id |
ftunivzuerich |
language |
English |
topic |
Institute of Geography 910 Geography & travel Geography Planning and Development General Earth and Planetary Sciences |
spellingShingle |
Institute of Geography 910 Geography & travel Geography Planning and Development General Earth and Planetary Sciences Frauenfelder, Regula Haeberli, Wilfried Hoelzle, Martin Maisch, Max Using relict rockglaciers in GIS-based modelling to reconstruct Younger Dryas permafrost distribution patterns in the Err-Julier area, Swiss Alp |
topic_facet |
Institute of Geography 910 Geography & travel Geography Planning and Development General Earth and Planetary Sciences |
description |
Differences in mean annual air temperature between the Younger Dryas period and today were estimated at the fronts of 32 relict rockglaciers in the Err-Julier area, eastern Swiss Alps. The analyses were based on a case-by-case calculation of direct incoming solar radiation and mean annual air temperature using a digital elevation model (DEM) and meteo data of recent years. Our results suggest that mean annual air temperature during the Younger Dryas was lowered by c. 3°C to 4°C, and that the lower limit of permafrost occurrence was depressed considerably more than glacier equilibrium lines. This indicates strongly reduced precipitation (30% to 40% reduction) and much larger abundance of mountain permafrost at that time. A model simulation of the corresponding spatial permafrost distribution during the Younger Dryas indicates that glaciers in the study area were mostly surrounded by permafrost at that time and probably had a polythermal structure of englacial temperatures. |
format |
Article in Journal/Newspaper |
author |
Frauenfelder, Regula Haeberli, Wilfried Hoelzle, Martin Maisch, Max |
author_facet |
Frauenfelder, Regula Haeberli, Wilfried Hoelzle, Martin Maisch, Max |
author_sort |
Frauenfelder, Regula |
title |
Using relict rockglaciers in GIS-based modelling to reconstruct Younger Dryas permafrost distribution patterns in the Err-Julier area, Swiss Alp |
title_short |
Using relict rockglaciers in GIS-based modelling to reconstruct Younger Dryas permafrost distribution patterns in the Err-Julier area, Swiss Alp |
title_full |
Using relict rockglaciers in GIS-based modelling to reconstruct Younger Dryas permafrost distribution patterns in the Err-Julier area, Swiss Alp |
title_fullStr |
Using relict rockglaciers in GIS-based modelling to reconstruct Younger Dryas permafrost distribution patterns in the Err-Julier area, Swiss Alp |
title_full_unstemmed |
Using relict rockglaciers in GIS-based modelling to reconstruct Younger Dryas permafrost distribution patterns in the Err-Julier area, Swiss Alp |
title_sort |
using relict rockglaciers in gis-based modelling to reconstruct younger dryas permafrost distribution patterns in the err-julier area, swiss alp |
publisher |
Taylor & Francis |
publishDate |
2001 |
url |
https://www.zora.uzh.ch/id/eprint/63452/ https://www.zora.uzh.ch/id/eprint/63452/1/Frauenfelder_etal_2001_using_relict.pdf https://doi.org/10.5167/uzh-63452 https://doi.org/10.1080/00291950152746522 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Frauenfelder, Regula; Haeberli, Wilfried; Hoelzle, Martin; Maisch, Max (2001). Using relict rockglaciers in GIS-based modelling to reconstruct Younger Dryas permafrost distribution patterns in the Err-Julier area, Swiss Alp. Norsk Geografisk Tidsskrift - Norwegian Journal of Geography, 55(4):195-202. |
op_relation |
https://www.zora.uzh.ch/id/eprint/63452/1/Frauenfelder_etal_2001_using_relict.pdf doi:10.5167/uzh-63452 doi:10.1080/00291950152746522 urn:issn:0029-1951 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.5167/uzh-6345210.1080/00291950152746522 |
_version_ |
1799487264502317056 |