Permafrost aggradation caused by tephra accumulation over snow‐covered surfaces: examples from the Hekla‐2000 eruption in Iceland
Abstract The relationship between explosive volcanic eruptions and permafrost aggradation is discussed at a regional (Hekla volcano, Iceland, 63°59′N 19°40′W) and a global scale. During the most recent Hekla eruption in winter 2000, tephra buried the adjacent winter snow cover. Observations of deniv...
Published in: | Permafrost and Periglacial Processes |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2007
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1002/ppp.596 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.596 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.596 |
id |
crwiley:10.1002/ppp.596 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1002/ppp.596 2024-06-23T07:44:55+00:00 Permafrost aggradation caused by tephra accumulation over snow‐covered surfaces: examples from the Hekla‐2000 eruption in Iceland Kellerer‐Pirklbauer, Andreas Farbrot, Herman Etzelmüller, Bernd 2007 http://dx.doi.org/10.1002/ppp.596 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.596 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.596 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Permafrost and Periglacial Processes volume 18, issue 3, page 269-284 ISSN 1045-6740 1099-1530 journal-article 2007 crwiley https://doi.org/10.1002/ppp.596 2024-06-11T04:46:11Z Abstract The relationship between explosive volcanic eruptions and permafrost aggradation is discussed at a regional (Hekla volcano, Iceland, 63°59′N 19°40′W) and a global scale. During the most recent Hekla eruption in winter 2000, tephra buried the adjacent winter snow cover. Observations of denivation landforms, excavated sections and active‐layer thickness were carried out 15 to 77 months after the eruption. Results show that the combination of climate that favours permafrost and a thin layer of tephra is sufficient to reduce the sub‐tephra snow ablation substantially, possibly even to zero, causing aggradation of the surface and preserving massive ground ice and permafrost. Based on these observations, a conceptual model for permafrost aggradation related to tephra accumulation was developed. On a global scale, about one third of all active volcanoes seems to be located in permafrost‐favourable areas, suggesting that explosive volcanic eruptions may be significant for permafrost aggradation. Copyright © 2007 John Wiley & Sons, Ltd. Article in Journal/Newspaper Active layer thickness Hekla Ice Iceland permafrost Permafrost and Periglacial Processes Wiley Online Library Permafrost and Periglacial Processes 18 3 269 284 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract The relationship between explosive volcanic eruptions and permafrost aggradation is discussed at a regional (Hekla volcano, Iceland, 63°59′N 19°40′W) and a global scale. During the most recent Hekla eruption in winter 2000, tephra buried the adjacent winter snow cover. Observations of denivation landforms, excavated sections and active‐layer thickness were carried out 15 to 77 months after the eruption. Results show that the combination of climate that favours permafrost and a thin layer of tephra is sufficient to reduce the sub‐tephra snow ablation substantially, possibly even to zero, causing aggradation of the surface and preserving massive ground ice and permafrost. Based on these observations, a conceptual model for permafrost aggradation related to tephra accumulation was developed. On a global scale, about one third of all active volcanoes seems to be located in permafrost‐favourable areas, suggesting that explosive volcanic eruptions may be significant for permafrost aggradation. Copyright © 2007 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Kellerer‐Pirklbauer, Andreas Farbrot, Herman Etzelmüller, Bernd |
spellingShingle |
Kellerer‐Pirklbauer, Andreas Farbrot, Herman Etzelmüller, Bernd Permafrost aggradation caused by tephra accumulation over snow‐covered surfaces: examples from the Hekla‐2000 eruption in Iceland |
author_facet |
Kellerer‐Pirklbauer, Andreas Farbrot, Herman Etzelmüller, Bernd |
author_sort |
Kellerer‐Pirklbauer, Andreas |
title |
Permafrost aggradation caused by tephra accumulation over snow‐covered surfaces: examples from the Hekla‐2000 eruption in Iceland |
title_short |
Permafrost aggradation caused by tephra accumulation over snow‐covered surfaces: examples from the Hekla‐2000 eruption in Iceland |
title_full |
Permafrost aggradation caused by tephra accumulation over snow‐covered surfaces: examples from the Hekla‐2000 eruption in Iceland |
title_fullStr |
Permafrost aggradation caused by tephra accumulation over snow‐covered surfaces: examples from the Hekla‐2000 eruption in Iceland |
title_full_unstemmed |
Permafrost aggradation caused by tephra accumulation over snow‐covered surfaces: examples from the Hekla‐2000 eruption in Iceland |
title_sort |
permafrost aggradation caused by tephra accumulation over snow‐covered surfaces: examples from the hekla‐2000 eruption in iceland |
publisher |
Wiley |
publishDate |
2007 |
url |
http://dx.doi.org/10.1002/ppp.596 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.596 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.596 |
genre |
Active layer thickness Hekla Ice Iceland permafrost Permafrost and Periglacial Processes |
genre_facet |
Active layer thickness Hekla Ice Iceland permafrost Permafrost and Periglacial Processes |
op_source |
Permafrost and Periglacial Processes volume 18, issue 3, page 269-284 ISSN 1045-6740 1099-1530 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ppp.596 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
18 |
container_issue |
3 |
container_start_page |
269 |
op_container_end_page |
284 |
_version_ |
1802640542394220544 |