Mountain permafrost in the Tropical Andes of Peru: the 0°C isotherm as a potential indicator
In the tropical Andes of Peru very little is known about the occurrence and extent of mountain permafrost. Only recently systematic studies have been carried out on the high elevation sites of the mountain ranges (cordilleras). In the framework of the first pioneering studies, and with the objective...
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US Permafrost Association (USPA)
2021
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ftunivzuerich:oai:www.zora.uzh.ch:211618 2023-05-15T17:55:52+02:00 Mountain permafrost in the Tropical Andes of Peru: the 0°C isotherm as a potential indicator León, Hairo Medina, Katy Loarte, Edwin Azócar, Guillermo Iribarren, Pablo Huggel, Christian 2021-10-29 application/pdf https://www.zora.uzh.ch/id/eprint/211618/ https://www.zora.uzh.ch/id/eprint/211618/1/2021_Huggel_MountainPermafrost_Lenetal_2021_final.pdf https://doi.org/10.5167/uzh-211618 https://doi.org/10.1061/9780784483589.011 eng eng US Permafrost Association (USPA) https://www.zora.uzh.ch/id/eprint/211618/1/2021_Huggel_MountainPermafrost_Lenetal_2021_final.pdf doi:10.5167/uzh-211618 doi:10.1061/9780784483589.011 info:eu-repo/semantics/openAccess León, Hairo; Medina, Katy; Loarte, Edwin; Azócar, Guillermo; Iribarren, Pablo; Huggel, Christian (2021). Mountain permafrost in the Tropical Andes of Peru: the 0°C isotherm as a potential indicator. In: Regional Conference on Permafrost 2021 and the 19th International Conference on Cold Regions Engineering, Virtual Conference, 24 October 2021 - 29 October 2021. US Permafrost Association (USPA), 117-129. Institute of Geography 910 Geography & travel Conference or Workshop Item NonPeerReviewed info:eu-repo/semantics/conferenceObject info:eu-repo/semantics/publishedVersion 2021 ftunivzuerich https://doi.org/10.5167/uzh-211618 https://doi.org/10.1061/9780784483589.011 2022-11-29T22:35:13Z In the tropical Andes of Peru very little is known about the occurrence and extent of mountain permafrost. Only recently systematic studies have been carried out on the high elevation sites of the mountain ranges (cordilleras). In the framework of the first pioneering studies, and with the objective to improve the understanding of characteristics of mountain permafrost and rock glaciers, we analyze how mountain permafrost in the Peruvian Andes is correlated with the altitude of the 0°C isotherm (ZIA). Climate change has generated an increase in air temperature and in the ZIA in the past decades. These temperature changes could lead to impact the state of the mountain permafrost. In this research, we focus on two mountain regions: The Cordillera Central (CC) and the Cordillera Volcánica (CV), the first located in the central zone and the second in the south zone of Peru. The study used air temperature data from 20 weather stations (2002–2016) to calculate the mean annual air temperature (MAAT), interpolated using a multiple linear regression model (MLRM) and digital elevation model (MERIT DEM). Occurrence and extent of 46 intact rock glaciers (IRG) and the global model of permafrost (Permafrost Zonation Index) were used to validate the results. The MAAT of CC has a minimum value around -4.1°C (R2 = 0.8) and a ZIA average of ~5152 m a.s.l. None of the IRGs are located above the ZIA. The MAAT of CV has a minimum value around of -5.5°C (R2 = 0.8), a ZIA average of ~4861 m a.s.l., and 60% of the IRGs are located above of the ZIA. The results show a greater variation of the position of the ZIA in CC in comparison to CV, which could indicate a possible degradation of mountain permafrost in these mountain ranges. Conference Object permafrost University of Zurich (UZH): ZORA (Zurich Open Repository and Archive |
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Open Polar |
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University of Zurich (UZH): ZORA (Zurich Open Repository and Archive |
op_collection_id |
ftunivzuerich |
language |
English |
topic |
Institute of Geography 910 Geography & travel |
spellingShingle |
Institute of Geography 910 Geography & travel León, Hairo Medina, Katy Loarte, Edwin Azócar, Guillermo Iribarren, Pablo Huggel, Christian Mountain permafrost in the Tropical Andes of Peru: the 0°C isotherm as a potential indicator |
topic_facet |
Institute of Geography 910 Geography & travel |
description |
In the tropical Andes of Peru very little is known about the occurrence and extent of mountain permafrost. Only recently systematic studies have been carried out on the high elevation sites of the mountain ranges (cordilleras). In the framework of the first pioneering studies, and with the objective to improve the understanding of characteristics of mountain permafrost and rock glaciers, we analyze how mountain permafrost in the Peruvian Andes is correlated with the altitude of the 0°C isotherm (ZIA). Climate change has generated an increase in air temperature and in the ZIA in the past decades. These temperature changes could lead to impact the state of the mountain permafrost. In this research, we focus on two mountain regions: The Cordillera Central (CC) and the Cordillera Volcánica (CV), the first located in the central zone and the second in the south zone of Peru. The study used air temperature data from 20 weather stations (2002–2016) to calculate the mean annual air temperature (MAAT), interpolated using a multiple linear regression model (MLRM) and digital elevation model (MERIT DEM). Occurrence and extent of 46 intact rock glaciers (IRG) and the global model of permafrost (Permafrost Zonation Index) were used to validate the results. The MAAT of CC has a minimum value around -4.1°C (R2 = 0.8) and a ZIA average of ~5152 m a.s.l. None of the IRGs are located above the ZIA. The MAAT of CV has a minimum value around of -5.5°C (R2 = 0.8), a ZIA average of ~4861 m a.s.l., and 60% of the IRGs are located above of the ZIA. The results show a greater variation of the position of the ZIA in CC in comparison to CV, which could indicate a possible degradation of mountain permafrost in these mountain ranges. |
format |
Conference Object |
author |
León, Hairo Medina, Katy Loarte, Edwin Azócar, Guillermo Iribarren, Pablo Huggel, Christian |
author_facet |
León, Hairo Medina, Katy Loarte, Edwin Azócar, Guillermo Iribarren, Pablo Huggel, Christian |
author_sort |
León, Hairo |
title |
Mountain permafrost in the Tropical Andes of Peru: the 0°C isotherm as a potential indicator |
title_short |
Mountain permafrost in the Tropical Andes of Peru: the 0°C isotherm as a potential indicator |
title_full |
Mountain permafrost in the Tropical Andes of Peru: the 0°C isotherm as a potential indicator |
title_fullStr |
Mountain permafrost in the Tropical Andes of Peru: the 0°C isotherm as a potential indicator |
title_full_unstemmed |
Mountain permafrost in the Tropical Andes of Peru: the 0°C isotherm as a potential indicator |
title_sort |
mountain permafrost in the tropical andes of peru: the 0°c isotherm as a potential indicator |
publisher |
US Permafrost Association (USPA) |
publishDate |
2021 |
url |
https://www.zora.uzh.ch/id/eprint/211618/ https://www.zora.uzh.ch/id/eprint/211618/1/2021_Huggel_MountainPermafrost_Lenetal_2021_final.pdf https://doi.org/10.5167/uzh-211618 https://doi.org/10.1061/9780784483589.011 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
León, Hairo; Medina, Katy; Loarte, Edwin; Azócar, Guillermo; Iribarren, Pablo; Huggel, Christian (2021). Mountain permafrost in the Tropical Andes of Peru: the 0°C isotherm as a potential indicator. In: Regional Conference on Permafrost 2021 and the 19th International Conference on Cold Regions Engineering, Virtual Conference, 24 October 2021 - 29 October 2021. US Permafrost Association (USPA), 117-129. |
op_relation |
https://www.zora.uzh.ch/id/eprint/211618/1/2021_Huggel_MountainPermafrost_Lenetal_2021_final.pdf doi:10.5167/uzh-211618 doi:10.1061/9780784483589.011 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5167/uzh-211618 https://doi.org/10.1061/9780784483589.011 |
_version_ |
1766163896355258368 |