Thaw Subsidence in Undisturbed Tundra Landscapes, Barrow, Alaska, 1962–2015
In some regions underlain by ice‐rich permafrost, a consistent, long‐term increase in ALT under changing climatic conditions is not supported by observations. The apparent lack of ALT may be attributed to soil consolidation from thawing of the uppermost ice‐rich permafrost and subsidence of the grou...
Published in: | Permafrost and Periglacial Processes |
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Online Access: | https://doi.org/10.1002/ppp.1918 |
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ftrepec:oai:RePEc:wly:perpro:v:28:y:2017:i:3:p:566-572 2023-05-15T15:39:37+02:00 Thaw Subsidence in Undisturbed Tundra Landscapes, Barrow, Alaska, 1962–2015 Dmitry A. Streletskiy Nikolay I. Shiklomanov Jonathon D. Little Frederick E. Nelson Jerry Brown Kelsey E. Nyland Anna E. Klene https://doi.org/10.1002/ppp.1918 unknown https://doi.org/10.1002/ppp.1918 article ftrepec https://doi.org/10.1002/ppp.1918 2020-12-04T13:31:03Z In some regions underlain by ice‐rich permafrost, a consistent, long‐term increase in ALT under changing climatic conditions is not supported by observations. The apparent lack of ALT may be attributed to soil consolidation from thawing of the uppermost ice‐rich permafrost and subsidence of the ground surface. Four plots established in 1962 at Barrow, Alaska, were re‐instrumented in 2003 and surveyed annually using differential GPS technology, accompanied by active‐layer probing. Elevation change from 1962 to 2003 was within the interannual variability of the 2003–15 period, indicating net stability in the area. Over the 2003–15 period, however, all four plots experienced subsidence trends of 0.4–1.0 cm/year, resulting in a net elevation change of 8–15 cm. Warmer winters and increased snow depth during this period decreased the potential for frost heave. Warmer summers resulted in thaw penetration into the ice‐rich transient layer and ice wedges, leading to the net subsidence in recent years. Copyright © 2016 John Wiley & Sons, Ltd. Article in Journal/Newspaper Barrow Ice permafrost Tundra wedge* Alaska RePEc (Research Papers in Economics) Permafrost and Periglacial Processes 28 3 566 572 |
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Open Polar |
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RePEc (Research Papers in Economics) |
op_collection_id |
ftrepec |
language |
unknown |
description |
In some regions underlain by ice‐rich permafrost, a consistent, long‐term increase in ALT under changing climatic conditions is not supported by observations. The apparent lack of ALT may be attributed to soil consolidation from thawing of the uppermost ice‐rich permafrost and subsidence of the ground surface. Four plots established in 1962 at Barrow, Alaska, were re‐instrumented in 2003 and surveyed annually using differential GPS technology, accompanied by active‐layer probing. Elevation change from 1962 to 2003 was within the interannual variability of the 2003–15 period, indicating net stability in the area. Over the 2003–15 period, however, all four plots experienced subsidence trends of 0.4–1.0 cm/year, resulting in a net elevation change of 8–15 cm. Warmer winters and increased snow depth during this period decreased the potential for frost heave. Warmer summers resulted in thaw penetration into the ice‐rich transient layer and ice wedges, leading to the net subsidence in recent years. Copyright © 2016 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Dmitry A. Streletskiy Nikolay I. Shiklomanov Jonathon D. Little Frederick E. Nelson Jerry Brown Kelsey E. Nyland Anna E. Klene |
spellingShingle |
Dmitry A. Streletskiy Nikolay I. Shiklomanov Jonathon D. Little Frederick E. Nelson Jerry Brown Kelsey E. Nyland Anna E. Klene Thaw Subsidence in Undisturbed Tundra Landscapes, Barrow, Alaska, 1962–2015 |
author_facet |
Dmitry A. Streletskiy Nikolay I. Shiklomanov Jonathon D. Little Frederick E. Nelson Jerry Brown Kelsey E. Nyland Anna E. Klene |
author_sort |
Dmitry A. Streletskiy |
title |
Thaw Subsidence in Undisturbed Tundra Landscapes, Barrow, Alaska, 1962–2015 |
title_short |
Thaw Subsidence in Undisturbed Tundra Landscapes, Barrow, Alaska, 1962–2015 |
title_full |
Thaw Subsidence in Undisturbed Tundra Landscapes, Barrow, Alaska, 1962–2015 |
title_fullStr |
Thaw Subsidence in Undisturbed Tundra Landscapes, Barrow, Alaska, 1962–2015 |
title_full_unstemmed |
Thaw Subsidence in Undisturbed Tundra Landscapes, Barrow, Alaska, 1962–2015 |
title_sort |
thaw subsidence in undisturbed tundra landscapes, barrow, alaska, 1962–2015 |
url |
https://doi.org/10.1002/ppp.1918 |
genre |
Barrow Ice permafrost Tundra wedge* Alaska |
genre_facet |
Barrow Ice permafrost Tundra wedge* Alaska |
op_relation |
https://doi.org/10.1002/ppp.1918 |
op_doi |
https://doi.org/10.1002/ppp.1918 |
container_title |
Permafrost and Periglacial Processes |
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28 |
container_issue |
3 |
container_start_page |
566 |
op_container_end_page |
572 |
_version_ |
1766371609913851904 |