Sub-aerial talik formation observed across the discontinuous permafrost zone of Alaska
Talik formation has long been acknowledged as an important mechanism of permafrost degradation. Currently, a lack of in situ observations has left a critical gap in our understanding of how ongoing climate change may influence future sub-aerial talik formation in areas unaffected by water bodies or...
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fttomskstateuniv:koha:001001121 2023-06-11T04:15:51+02:00 Sub-aerial talik formation observed across the discontinuous permafrost zone of Alaska Farquharson, Louise M. Romanovsky, Vladimir E. Kholodov, Alexander Nicolsky, Dmitry 2022 https://doi.org/10.1038/s41561-022-00952-z https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001001121 ru rus koha:001001121 doi:10.1038/s41561-022-00952-z https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001001121 Nature geoscience. 2022. Vol. 15, № 6. P. 475-481 Аляска вечная мерзлота талики статьи в журналах info:eu-repo/semantics/article 2022 fttomskstateuniv https://doi.org/10.1038/s41561-022-00952-z 2023-05-02T16:38:21Z Talik formation has long been acknowledged as an important mechanism of permafrost degradation. Currently, a lack of in situ observations has left a critical gap in our understanding of how ongoing climate change may influence future sub-aerial talik formation in areas unaffected by water bodies or wildfire. Here we present in situ ground temperature measurements from undisturbed sub-aerial sites across the discontinuous permafrost zone of Alaska between 1999 and 2020. We find that novel taliks formed at 24 sites across the region, with widespread initiation occurring during the winter of 2018 due to higher air temperatures and above-average snowfall insulating the soil. Future projections under a high emissions scenario show that by 2030, talik formation will initiate across up to 70% of the discontinuous permafrost zone, regardless of snow conditions. By 2090, talik in areas of black spruce forest, and warmer ecosystems, may reach a thickness of 12 m. The establishment of widespread sub-aerial taliks has major implications for permafrost thaw, thermokarst development, carbon cycling, hydrological connectivity and engineering. Temperature observations from across Alaska show widespread talik formation in the discontinuous permafrost zone due to higher air temperatures and above-average snowfall in recent years. Article in Journal/Newspaper permafrost Thermokarst Alaska вечная мерзлота Tomsk State University Research Library Talik ENVELOPE(146.601,146.601,59.667,59.667) Nature Geoscience 15 6 475 481 |
institution |
Open Polar |
collection |
Tomsk State University Research Library |
op_collection_id |
fttomskstateuniv |
language |
Russian |
topic |
Аляска вечная мерзлота талики |
spellingShingle |
Аляска вечная мерзлота талики Farquharson, Louise M. Romanovsky, Vladimir E. Kholodov, Alexander Nicolsky, Dmitry Sub-aerial talik formation observed across the discontinuous permafrost zone of Alaska |
topic_facet |
Аляска вечная мерзлота талики |
description |
Talik formation has long been acknowledged as an important mechanism of permafrost degradation. Currently, a lack of in situ observations has left a critical gap in our understanding of how ongoing climate change may influence future sub-aerial talik formation in areas unaffected by water bodies or wildfire. Here we present in situ ground temperature measurements from undisturbed sub-aerial sites across the discontinuous permafrost zone of Alaska between 1999 and 2020. We find that novel taliks formed at 24 sites across the region, with widespread initiation occurring during the winter of 2018 due to higher air temperatures and above-average snowfall insulating the soil. Future projections under a high emissions scenario show that by 2030, talik formation will initiate across up to 70% of the discontinuous permafrost zone, regardless of snow conditions. By 2090, talik in areas of black spruce forest, and warmer ecosystems, may reach a thickness of 12 m. The establishment of widespread sub-aerial taliks has major implications for permafrost thaw, thermokarst development, carbon cycling, hydrological connectivity and engineering. Temperature observations from across Alaska show widespread talik formation in the discontinuous permafrost zone due to higher air temperatures and above-average snowfall in recent years. |
format |
Article in Journal/Newspaper |
author |
Farquharson, Louise M. Romanovsky, Vladimir E. Kholodov, Alexander Nicolsky, Dmitry |
author_facet |
Farquharson, Louise M. Romanovsky, Vladimir E. Kholodov, Alexander Nicolsky, Dmitry |
author_sort |
Farquharson, Louise M. |
title |
Sub-aerial talik formation observed across the discontinuous permafrost zone of Alaska |
title_short |
Sub-aerial talik formation observed across the discontinuous permafrost zone of Alaska |
title_full |
Sub-aerial talik formation observed across the discontinuous permafrost zone of Alaska |
title_fullStr |
Sub-aerial talik formation observed across the discontinuous permafrost zone of Alaska |
title_full_unstemmed |
Sub-aerial talik formation observed across the discontinuous permafrost zone of Alaska |
title_sort |
sub-aerial talik formation observed across the discontinuous permafrost zone of alaska |
publishDate |
2022 |
url |
https://doi.org/10.1038/s41561-022-00952-z https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001001121 |
long_lat |
ENVELOPE(146.601,146.601,59.667,59.667) |
geographic |
Talik |
geographic_facet |
Talik |
genre |
permafrost Thermokarst Alaska вечная мерзлота |
genre_facet |
permafrost Thermokarst Alaska вечная мерзлота |
op_source |
Nature geoscience. 2022. Vol. 15, № 6. P. 475-481 |
op_relation |
koha:001001121 doi:10.1038/s41561-022-00952-z https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001001121 |
op_doi |
https://doi.org/10.1038/s41561-022-00952-z |
container_title |
Nature Geoscience |
container_volume |
15 |
container_issue |
6 |
container_start_page |
475 |
op_container_end_page |
481 |
_version_ |
1768373029942853632 |