Patterns of Discontinuous Permafrost Thaw in Peatlands
Climate warming in discontinuous permafrost peatlands is causing permafrost loss and changes in ecosystem dynamics at an unprecedented rate. Though rates of permafrost loss and landscape change have been widely documented based on remote sensing and field measurements, the local mechanisms of permaf...
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dataone:sha256:86bd107212beaa7c1d5db49e3d93663d1f0197a6dba4e339e70559cf7e126e7c 2024-06-03T18:46:50+00:00 Patterns of Discontinuous Permafrost Thaw in Peatlands Devoie, Élise Quinton, William L. BEGINDATE: 1998-08-01T00:00:00Z ENDDATE: 2020-01-01T00:00:00Z 2021-10-19T00:00:00Z https://search.dataone.org/view/sha256:86bd107212beaa7c1d5db49e3d93663d1f0197a6dba4e339e70559cf7e126e7c unknown Earth and Environmental Sciences permafrost Dataset 2021 dataone:urn:node:BOREALIS 2024-06-03T18:17:44Z Climate warming in discontinuous permafrost peatlands is causing permafrost loss and changes in ecosystem dynamics at an unprecedented rate. Though rates of permafrost loss and landscape change have been widely documented based on remote sensing and field measurements, the local mechanisms of permafrost degradation remain under-studied. Data collected over three decades of research in the Scotty Creek study basin in the southern Northwest Territories of Canada was analyzed to find vertical conduction accounts for most vertical permafrost degradation, while advective processes are needed to describe thaw in features which are subject to seasonal flows. It was found that heat advection was necessary to describe lateral thaw rates, which are up to an order of magnitude greater than vertical thaw. Thaw from below, driven either by the geothermal gradient or groundwater flow, may account for up to 10 cm of permafrost thaw annually. Once these thaw mechanisms were established, the hydrologic, thermodynamic and geophysical function of taliks in different parts of the landscape were considered in light of the data collected at the and surrounding area. This analysis is supported through the use of ERT data detailing the subsurface permafrost structure. Data collected at Scotty Creek points to a pattern of talik evolution and permafrost degradation. This understanding of local thaw mechanisms and trajectory is an important first step in being able to predict distributed permafrost thaw in peatlands. This research data is associated with Scotty Creek Research Station, 50km south of Fort Simpson, in the Northwest Territories, Canada. Learn more about SCRS and its research at http://scottycreek.com. Dataset Fort Simpson Northwest Territories permafrost Unknown Canada Fort Simpson ENVELOPE(-121.320,-121.320,61.808,61.808) Northwest Territories Scotty Creek ENVELOPE(-121.561,-121.561,61.436,61.436) Talik ENVELOPE(146.601,146.601,59.667,59.667) |
institution |
Open Polar |
collection |
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op_collection_id |
dataone:urn:node:BOREALIS |
language |
unknown |
topic |
Earth and Environmental Sciences permafrost |
spellingShingle |
Earth and Environmental Sciences permafrost Devoie, Élise Quinton, William L. Patterns of Discontinuous Permafrost Thaw in Peatlands |
topic_facet |
Earth and Environmental Sciences permafrost |
description |
Climate warming in discontinuous permafrost peatlands is causing permafrost loss and changes in ecosystem dynamics at an unprecedented rate. Though rates of permafrost loss and landscape change have been widely documented based on remote sensing and field measurements, the local mechanisms of permafrost degradation remain under-studied. Data collected over three decades of research in the Scotty Creek study basin in the southern Northwest Territories of Canada was analyzed to find vertical conduction accounts for most vertical permafrost degradation, while advective processes are needed to describe thaw in features which are subject to seasonal flows. It was found that heat advection was necessary to describe lateral thaw rates, which are up to an order of magnitude greater than vertical thaw. Thaw from below, driven either by the geothermal gradient or groundwater flow, may account for up to 10 cm of permafrost thaw annually. Once these thaw mechanisms were established, the hydrologic, thermodynamic and geophysical function of taliks in different parts of the landscape were considered in light of the data collected at the and surrounding area. This analysis is supported through the use of ERT data detailing the subsurface permafrost structure. Data collected at Scotty Creek points to a pattern of talik evolution and permafrost degradation. This understanding of local thaw mechanisms and trajectory is an important first step in being able to predict distributed permafrost thaw in peatlands. This research data is associated with Scotty Creek Research Station, 50km south of Fort Simpson, in the Northwest Territories, Canada. Learn more about SCRS and its research at http://scottycreek.com. |
format |
Dataset |
author |
Devoie, Élise Quinton, William L. |
author_facet |
Devoie, Élise Quinton, William L. |
author_sort |
Devoie, Élise |
title |
Patterns of Discontinuous Permafrost Thaw in Peatlands |
title_short |
Patterns of Discontinuous Permafrost Thaw in Peatlands |
title_full |
Patterns of Discontinuous Permafrost Thaw in Peatlands |
title_fullStr |
Patterns of Discontinuous Permafrost Thaw in Peatlands |
title_full_unstemmed |
Patterns of Discontinuous Permafrost Thaw in Peatlands |
title_sort |
patterns of discontinuous permafrost thaw in peatlands |
publishDate |
2021 |
url |
https://search.dataone.org/view/sha256:86bd107212beaa7c1d5db49e3d93663d1f0197a6dba4e339e70559cf7e126e7c |
op_coverage |
BEGINDATE: 1998-08-01T00:00:00Z ENDDATE: 2020-01-01T00:00:00Z |
long_lat |
ENVELOPE(-121.320,-121.320,61.808,61.808) ENVELOPE(-121.561,-121.561,61.436,61.436) ENVELOPE(146.601,146.601,59.667,59.667) |
geographic |
Canada Fort Simpson Northwest Territories Scotty Creek Talik |
geographic_facet |
Canada Fort Simpson Northwest Territories Scotty Creek Talik |
genre |
Fort Simpson Northwest Territories permafrost |
genre_facet |
Fort Simpson Northwest Territories permafrost |
_version_ |
1800871757240860672 |