An overcooled coarse‐grained talus slope at low elevation: New insights on air circulation and environmental impacts, Cannon Cliff, New Hampshire, USA
Abstract Overcooled talus slopes are generally described as islands of sporadic permafrost below the lower alpine limit of permafrost. The negative thermal anomaly of the ground is mainly consecutive to the internal ventilation of the deposit, but it is also conditioned by multiple factors as topogr...
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crwiley:10.1002/esp.5792 2024-06-02T08:08:02+00:00 An overcooled coarse‐grained talus slope at low elevation: New insights on air circulation and environmental impacts, Cannon Cliff, New Hampshire, USA Germain, Daniel Milot, Jean‐François Natural Sciences and Engineering Research Council of Canada 2024 http://dx.doi.org/10.1002/esp.5792 https://onlinelibrary.wiley.com/doi/pdf/10.1002/esp.5792 en eng Wiley http://creativecommons.org/licenses/by-nc-nd/4.0/ Earth Surface Processes and Landforms volume 49, issue 5, page 1705-1720 ISSN 0197-9337 1096-9837 journal-article 2024 crwiley https://doi.org/10.1002/esp.5792 2024-05-03T11:07:21Z Abstract Overcooled talus slopes are generally described as islands of sporadic permafrost below the lower alpine limit of permafrost. The negative thermal anomaly of the ground is mainly consecutive to the internal ventilation of the deposit, but it is also conditioned by multiple factors as topography, slope aspect and incline, openwork structure and coarseness of the deposit, air temperature, solar radiation and wind regime. Therefore, the study of the spatiotemporal dynamics of ventilation processes allows a better understanding of the phenomenon. At Cannon Cliff, New Hampshire (USA), several field visits and environmental monitoring allowed us to describe the varying nature and significance of the ventilation mechanisms that can be observed at the ground surface and associated with both the intensity and direction of the airflows in a talus debris accumulation/protalus rampart system. The thermal negative anomalies are strong enough to lower the ground temperature to the point of preserving ice during the late spring and summer seasons. The monitoring of the gradient between external (air) and internal (talus) temperatures coupled with several dendroecological and geomorphological analyses provided a complete environmental picture of the impacts, feedback and extent of the phenomenon. Article in Journal/Newspaper Ice permafrost Wiley Online Library Earth Surface Processes and Landforms |
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Open Polar |
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Wiley Online Library |
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English |
description |
Abstract Overcooled talus slopes are generally described as islands of sporadic permafrost below the lower alpine limit of permafrost. The negative thermal anomaly of the ground is mainly consecutive to the internal ventilation of the deposit, but it is also conditioned by multiple factors as topography, slope aspect and incline, openwork structure and coarseness of the deposit, air temperature, solar radiation and wind regime. Therefore, the study of the spatiotemporal dynamics of ventilation processes allows a better understanding of the phenomenon. At Cannon Cliff, New Hampshire (USA), several field visits and environmental monitoring allowed us to describe the varying nature and significance of the ventilation mechanisms that can be observed at the ground surface and associated with both the intensity and direction of the airflows in a talus debris accumulation/protalus rampart system. The thermal negative anomalies are strong enough to lower the ground temperature to the point of preserving ice during the late spring and summer seasons. The monitoring of the gradient between external (air) and internal (talus) temperatures coupled with several dendroecological and geomorphological analyses provided a complete environmental picture of the impacts, feedback and extent of the phenomenon. |
author2 |
Natural Sciences and Engineering Research Council of Canada |
format |
Article in Journal/Newspaper |
author |
Germain, Daniel Milot, Jean‐François |
spellingShingle |
Germain, Daniel Milot, Jean‐François An overcooled coarse‐grained talus slope at low elevation: New insights on air circulation and environmental impacts, Cannon Cliff, New Hampshire, USA |
author_facet |
Germain, Daniel Milot, Jean‐François |
author_sort |
Germain, Daniel |
title |
An overcooled coarse‐grained talus slope at low elevation: New insights on air circulation and environmental impacts, Cannon Cliff, New Hampshire, USA |
title_short |
An overcooled coarse‐grained talus slope at low elevation: New insights on air circulation and environmental impacts, Cannon Cliff, New Hampshire, USA |
title_full |
An overcooled coarse‐grained talus slope at low elevation: New insights on air circulation and environmental impacts, Cannon Cliff, New Hampshire, USA |
title_fullStr |
An overcooled coarse‐grained talus slope at low elevation: New insights on air circulation and environmental impacts, Cannon Cliff, New Hampshire, USA |
title_full_unstemmed |
An overcooled coarse‐grained talus slope at low elevation: New insights on air circulation and environmental impacts, Cannon Cliff, New Hampshire, USA |
title_sort |
overcooled coarse‐grained talus slope at low elevation: new insights on air circulation and environmental impacts, cannon cliff, new hampshire, usa |
publisher |
Wiley |
publishDate |
2024 |
url |
http://dx.doi.org/10.1002/esp.5792 https://onlinelibrary.wiley.com/doi/pdf/10.1002/esp.5792 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
Earth Surface Processes and Landforms volume 49, issue 5, page 1705-1720 ISSN 0197-9337 1096-9837 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_doi |
https://doi.org/10.1002/esp.5792 |
container_title |
Earth Surface Processes and Landforms |
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1800753187622223872 |