Characteristics and origin of rock glaciers in northern Tien Shan (Kazakhstan/Kyrgyzstan)
Northern Tien Shan is characterised by a distinct periglacial belt that contains many rock glaciers with an area of 1km² or more. To investigate the reason for their large size and variable occurrence, we analysed a representative subsample of the rock glaciers with respect to topographic and climat...
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Wiley-Blackwell Publishing, Inc.
2014
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ftunivzuerich:oai:www.zora.uzh.ch:101925 2024-09-15T18:29:47+00:00 Characteristics and origin of rock glaciers in northern Tien Shan (Kazakhstan/Kyrgyzstan) Bolch, Tobias Gorbunov, Aldar P 2014 application/pdf https://www.zora.uzh.ch/id/eprint/101925/ https://www.zora.uzh.ch/id/eprint/101925/1/BolchGorb14_ppp_RockGlacNorthTienShan.pdf https://www.zora.uzh.ch/id/eprint/101925/7/BolchRockglTienShan_PPP_acceptedmanuscript.pdf https://doi.org/10.5167/uzh-101925 https://doi.org/10.1002/ppp.1825 eng eng Wiley-Blackwell Publishing, Inc. https://www.zora.uzh.ch/id/eprint/101925/1/BolchGorb14_ppp_RockGlacNorthTienShan.pdf https://www.zora.uzh.ch/id/eprint/101925/7/BolchRockglTienShan_PPP_acceptedmanuscript.pdf doi:10.5167/uzh-101925 doi:10.1002/ppp.1825 urn:issn:1045-6740 info:eu-repo/semantics/openAccess Bolch, Tobias; Gorbunov, Aldar P (2014). Characteristics and origin of rock glaciers in northern Tien Shan (Kazakhstan/Kyrgyzstan). Permafrost and Periglacial Processes, 25(4):320-332. Institute of Geography 910 Geography & travel Earth-Surface Processes Journal Article PeerReviewed info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/acceptedVersion 2014 ftunivzuerich https://doi.org/10.5167/uzh-10192510.1002/ppp.1825 2024-08-14T00:23:57Z Northern Tien Shan is characterised by a distinct periglacial belt that contains many rock glaciers with an area of 1km² or more. To investigate the reason for their large size and variable occurrence, we analysed a representative subsample of the rock glaciers with respect to topographic and climatic variables. A simple permafrost model indicates that the rock glaciers originate in the zone where permafrost occurrence is very likely and some large rock glaciers flow down to elevations where permafrost is unlikely to exist outside the rock glaciers themselves. Correlation and multiple regression analyses revealed that the occurrence and characteristics of the rock glaciers can only be partly explained by the characteristics of the contributing area (e.g. its area or the headwall height). The correlation is greater with talus-type rock glaciers than with moraine-type rock glaciers. The climate can explain the general occurrence of rock glaciers but not their specific characteristics. It is hypothesised that the main reason for the specific distribution and characteristics of these large rock glaciers relates to the interaction with polythermal glaciers, topographic characteristics, intensive weathering and rock avalanches triggered by seismic activity. Article in Journal/Newspaper permafrost Permafrost and Periglacial Processes 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 Earth-Surface Processes |
spellingShingle |
Institute of Geography 910 Geography & travel Earth-Surface Processes Bolch, Tobias Gorbunov, Aldar P Characteristics and origin of rock glaciers in northern Tien Shan (Kazakhstan/Kyrgyzstan) |
topic_facet |
Institute of Geography 910 Geography & travel Earth-Surface Processes |
description |
Northern Tien Shan is characterised by a distinct periglacial belt that contains many rock glaciers with an area of 1km² or more. To investigate the reason for their large size and variable occurrence, we analysed a representative subsample of the rock glaciers with respect to topographic and climatic variables. A simple permafrost model indicates that the rock glaciers originate in the zone where permafrost occurrence is very likely and some large rock glaciers flow down to elevations where permafrost is unlikely to exist outside the rock glaciers themselves. Correlation and multiple regression analyses revealed that the occurrence and characteristics of the rock glaciers can only be partly explained by the characteristics of the contributing area (e.g. its area or the headwall height). The correlation is greater with talus-type rock glaciers than with moraine-type rock glaciers. The climate can explain the general occurrence of rock glaciers but not their specific characteristics. It is hypothesised that the main reason for the specific distribution and characteristics of these large rock glaciers relates to the interaction with polythermal glaciers, topographic characteristics, intensive weathering and rock avalanches triggered by seismic activity. |
format |
Article in Journal/Newspaper |
author |
Bolch, Tobias Gorbunov, Aldar P |
author_facet |
Bolch, Tobias Gorbunov, Aldar P |
author_sort |
Bolch, Tobias |
title |
Characteristics and origin of rock glaciers in northern Tien Shan (Kazakhstan/Kyrgyzstan) |
title_short |
Characteristics and origin of rock glaciers in northern Tien Shan (Kazakhstan/Kyrgyzstan) |
title_full |
Characteristics and origin of rock glaciers in northern Tien Shan (Kazakhstan/Kyrgyzstan) |
title_fullStr |
Characteristics and origin of rock glaciers in northern Tien Shan (Kazakhstan/Kyrgyzstan) |
title_full_unstemmed |
Characteristics and origin of rock glaciers in northern Tien Shan (Kazakhstan/Kyrgyzstan) |
title_sort |
characteristics and origin of rock glaciers in northern tien shan (kazakhstan/kyrgyzstan) |
publisher |
Wiley-Blackwell Publishing, Inc. |
publishDate |
2014 |
url |
https://www.zora.uzh.ch/id/eprint/101925/ https://www.zora.uzh.ch/id/eprint/101925/1/BolchGorb14_ppp_RockGlacNorthTienShan.pdf https://www.zora.uzh.ch/id/eprint/101925/7/BolchRockglTienShan_PPP_acceptedmanuscript.pdf https://doi.org/10.5167/uzh-101925 https://doi.org/10.1002/ppp.1825 |
genre |
permafrost Permafrost and Periglacial Processes |
genre_facet |
permafrost Permafrost and Periglacial Processes |
op_source |
Bolch, Tobias; Gorbunov, Aldar P (2014). Characteristics and origin of rock glaciers in northern Tien Shan (Kazakhstan/Kyrgyzstan). Permafrost and Periglacial Processes, 25(4):320-332. |
op_relation |
https://www.zora.uzh.ch/id/eprint/101925/1/BolchGorb14_ppp_RockGlacNorthTienShan.pdf https://www.zora.uzh.ch/id/eprint/101925/7/BolchRockglTienShan_PPP_acceptedmanuscript.pdf doi:10.5167/uzh-101925 doi:10.1002/ppp.1825 urn:issn:1045-6740 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5167/uzh-10192510.1002/ppp.1825 |
_version_ |
1810471212724256768 |