Western Canada Late Pleistocene Permafrost Caves Speleothem uranium-thorium (U/Th) Data, 2016 - 2019
Given the possibility of substantial greenhouse gas release from thawing permafrost in a warmer future, as well as the threats to infrastructure from thawing permafrost, understanding the response of permafrost to past warmth is of fundamental importance. Speleothems (stalagmites and stalactites) on...
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Arctic Data Center
2020
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dataone:doi:10.18739/A2VQ2SB1D 2024-10-03T18:45:51+00:00 Western Canada Late Pleistocene Permafrost Caves Speleothem uranium-thorium (U/Th) Data, 2016 - 2019 David McGee Southern Canadian Rockies caves Nahanni caves Yukon caves ENVELOPE(-117.3,-114.5,50.3,49.5) BEGINDATE: 2016-01-01T00:00:00Z ENDDATE: 2019-01-01T00:00:00Z 2020-01-01T00:00:00Z https://doi.org/10.18739/A2VQ2SB1D unknown Arctic Data Center Permafrost Caves Speleothems Geochronology Canada Dataset 2020 dataone:urn:node:ARCTIC https://doi.org/10.18739/A2VQ2SB1D 2024-10-03T18:16:15Z Given the possibility of substantial greenhouse gas release from thawing permafrost in a warmer future, as well as the threats to infrastructure from thawing permafrost, understanding the response of permafrost to past warmth is of fundamental importance. Speleothems (stalagmites and stalactites) only are expected to grow in Arctic caves when the overlying permafrost has thawed and no longer presents an impermeable barrier to seepage from the surface into the cave. In this project, we reconstruct permafrost history in western Canada during Pleistocene interglacials from 131 uranium-thorium (U/Th) ages on 74 speleothems, providing a record of when speleothems grew in Arctic caves and, consequently, under what past climatic conditions permafrost thawed. The project uses existing speleothem collections from three areas in western Canada spanning 17° of latitude and isolated to continuous permafrost zones. The U/Th dates document the extent of speleothem growth, and thus permafrost thaw, across variable interglacial conditions of the past 500 thousand years (kyr). The data suggest that permafrost in the Yukon region was largely stable over the last 500 kyr, with only limited thaw during the Marine Isotope Stage (MIS) 11 interglacial. Thawing is more common at the sites in central and southwestern Canada, but the MIS11 interglacial still stands out as the interglacial with the most permafrost melting during the last 500 kyr. Dataset Arctic permafrost Yukon Arctic Data Center (via DataONE) Arctic Canada Yukon ENVELOPE(-117.3,-114.5,50.3,49.5) |
institution |
Open Polar |
collection |
Arctic Data Center (via DataONE) |
op_collection_id |
dataone:urn:node:ARCTIC |
language |
unknown |
topic |
Permafrost Caves Speleothems Geochronology Canada |
spellingShingle |
Permafrost Caves Speleothems Geochronology Canada David McGee Western Canada Late Pleistocene Permafrost Caves Speleothem uranium-thorium (U/Th) Data, 2016 - 2019 |
topic_facet |
Permafrost Caves Speleothems Geochronology Canada |
description |
Given the possibility of substantial greenhouse gas release from thawing permafrost in a warmer future, as well as the threats to infrastructure from thawing permafrost, understanding the response of permafrost to past warmth is of fundamental importance. Speleothems (stalagmites and stalactites) only are expected to grow in Arctic caves when the overlying permafrost has thawed and no longer presents an impermeable barrier to seepage from the surface into the cave. In this project, we reconstruct permafrost history in western Canada during Pleistocene interglacials from 131 uranium-thorium (U/Th) ages on 74 speleothems, providing a record of when speleothems grew in Arctic caves and, consequently, under what past climatic conditions permafrost thawed. The project uses existing speleothem collections from three areas in western Canada spanning 17° of latitude and isolated to continuous permafrost zones. The U/Th dates document the extent of speleothem growth, and thus permafrost thaw, across variable interglacial conditions of the past 500 thousand years (kyr). The data suggest that permafrost in the Yukon region was largely stable over the last 500 kyr, with only limited thaw during the Marine Isotope Stage (MIS) 11 interglacial. Thawing is more common at the sites in central and southwestern Canada, but the MIS11 interglacial still stands out as the interglacial with the most permafrost melting during the last 500 kyr. |
format |
Dataset |
author |
David McGee |
author_facet |
David McGee |
author_sort |
David McGee |
title |
Western Canada Late Pleistocene Permafrost Caves Speleothem uranium-thorium (U/Th) Data, 2016 - 2019 |
title_short |
Western Canada Late Pleistocene Permafrost Caves Speleothem uranium-thorium (U/Th) Data, 2016 - 2019 |
title_full |
Western Canada Late Pleistocene Permafrost Caves Speleothem uranium-thorium (U/Th) Data, 2016 - 2019 |
title_fullStr |
Western Canada Late Pleistocene Permafrost Caves Speleothem uranium-thorium (U/Th) Data, 2016 - 2019 |
title_full_unstemmed |
Western Canada Late Pleistocene Permafrost Caves Speleothem uranium-thorium (U/Th) Data, 2016 - 2019 |
title_sort |
western canada late pleistocene permafrost caves speleothem uranium-thorium (u/th) data, 2016 - 2019 |
publisher |
Arctic Data Center |
publishDate |
2020 |
url |
https://doi.org/10.18739/A2VQ2SB1D |
op_coverage |
Southern Canadian Rockies caves Nahanni caves Yukon caves ENVELOPE(-117.3,-114.5,50.3,49.5) BEGINDATE: 2016-01-01T00:00:00Z ENDDATE: 2019-01-01T00:00:00Z |
long_lat |
ENVELOPE(-117.3,-114.5,50.3,49.5) |
geographic |
Arctic Canada Yukon |
geographic_facet |
Arctic Canada Yukon |
genre |
Arctic permafrost Yukon |
genre_facet |
Arctic permafrost Yukon |
op_doi |
https://doi.org/10.18739/A2VQ2SB1D |
_version_ |
1811921443975331840 |