Nature Geoscience, volume 15, issue 6, pages 475-481
Sub-aerial talik formation observed across the discontinuous permafrost zone of Alaska
1
Geophysical Institute Permafrost Laboratory, University of Alaska Fairbanks, Fairbanks, USA
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Publication type: Journal Article
Publication date: 2022-06-06
Journal:
Nature Geoscience
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor: 18.3
ISSN: 17520894, 17520908
General Earth and Planetary Sciences
Abstract
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.
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Farquharson L. et al. Sub-aerial talik formation observed across the discontinuous permafrost zone of Alaska // Nature Geoscience. 2022. Vol. 15. No. 6. pp. 475-481.
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Farquharson L., Romanovsky V. E., Kholodov A., Nicolsky D. J. Sub-aerial talik formation observed across the discontinuous permafrost zone of Alaska // Nature Geoscience. 2022. Vol. 15. No. 6. pp. 475-481.
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TY - JOUR
DO - 10.1038/s41561-022-00952-z
UR - https://doi.org/10.1038%2Fs41561-022-00952-z
TI - Sub-aerial talik formation observed across the discontinuous permafrost zone of Alaska
T2 - Nature Geoscience
AU - Farquharson, Louise
AU - Romanovsky, Vladimir E.
AU - Kholodov, Alexander
AU - Nicolsky, D. J.
PY - 2022
DA - 2022/06/06 00:00:00
PB - Springer Nature
SP - 475-481
IS - 6
VL - 15
SN - 1752-0894
SN - 1752-0908
ER -
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@article{2022_Farquharson,
author = {Louise Farquharson and Vladimir E. Romanovsky and Alexander Kholodov and D. J. Nicolsky},
title = {Sub-aerial talik formation observed across the discontinuous permafrost zone of Alaska},
journal = {Nature Geoscience},
year = {2022},
volume = {15},
publisher = {Springer Nature},
month = {jun},
url = {https://doi.org/10.1038%2Fs41561-022-00952-z},
number = {6},
pages = {475--481},
doi = {10.1038/s41561-022-00952-z}
}
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MLA
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Farquharson, Louise, et al. “Sub-aerial talik formation observed across the discontinuous permafrost zone of Alaska.” Nature Geoscience, vol. 15, no. 6, Jun. 2022, pp. 475-481. https://doi.org/10.1038%2Fs41561-022-00952-z.