دورية أكاديمية
Post-fire stabilization of thaw-affected permafrost terrain in northern Alaska.
| العنوان: | Post-fire stabilization of thaw-affected permafrost terrain in northern Alaska. |
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| المؤلفون: | Jones BM; Institute of Northern Engineering, University of Alaska Fairbanks, Fairbanks, AK, 99775, USA. bmjones3@alaska.edu., Kanevskiy MZ; Institute of Northern Engineering, University of Alaska Fairbanks, Fairbanks, AK, 99775, USA., Shur Y; College of Engineering and Mines, University of Alaska Fairbanks, Fairbanks, AK, 99775, USA., Gaglioti BV; Institute of Northern Engineering, University of Alaska Fairbanks, Fairbanks, AK, 99775, USA., Jorgenson MT; Alaska Ecoscience, Fairbanks, AK, 99775, USA., Ward Jones MK; Institute of Northern Engineering, University of Alaska Fairbanks, Fairbanks, AK, 99775, USA., Veremeeva A; Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Potsdam, Germany., Miller EA; Bureau of Land Management Alaska Fire Service, Fort Wainwright, AK, 99703, USA., Jandt R; Alaska Fire Science Consortium, University of Alaska Fairbanks, Fairbanks, AK, 99775, USA. |
| المصدر: | Scientific reports [Sci Rep] 2024 Apr 11; Vol. 14 (1), pp. 8499. Date of Electronic Publication: 2024 Apr 11. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: Nature Publishing Group Country of Publication: England NLM ID: 101563288 Publication Model: Electronic Cited Medium: Internet ISSN: 2045-2322 (Electronic) Linking ISSN: 20452322 NLM ISO Abbreviation: Sci Rep Subsets: PubMed not MEDLINE; MEDLINE |
| أسماء مطبوعة: | Original Publication: London : Nature Publishing Group, copyright 2011- |
| مستخلص: | In 2007, the Anaktuvuk River fire burned more than 1000 km 2 of arctic tundra in northern Alaska, ~ 50% of which occurred in an area with ice-rich syngenetic permafrost (Yedoma). By 2014, widespread degradation of ice wedges was apparent in the Yedoma region. In a 50 km 2 area, thaw subsidence was detected across 15% of the land area in repeat airborne LiDAR data acquired in 2009 and 2014. Updating observations with a 2021 airborne LiDAR dataset show that additional thaw subsidence was detected in < 1% of the study area, indicating stabilization of the thaw-affected permafrost terrain. Ground temperature measurements between 2010 and 2015 indicated that the number of near-surface soil thawing-degree-days at the burn site were 3 × greater than at an unburned control site, but by 2022 the number was reduced to 1.3 × greater. Mean annual ground temperature of the near-surface permafrost increased by 0.33 °C/yr in the burn site up to 7-years post-fire, but then cooled by 0.15 °C/yr in the subsequent eight years, while temperatures at the control site remained relatively stable. Permafrost cores collected from ice-wedge troughs (n = 41) and polygon centers (n = 8) revealed the presence of a thaw unconformity, that in most cases was overlain by a recovered permafrost layer that averaged 14.2 cm and 18.3 cm, respectively. Taken together, our observations highlight that the initial degradation of ice-rich permafrost following the Anaktuvuk River tundra fire has been followed by a period of thaw cessation, permafrost aggradation, and terrain stabilization. (© 2024. The Author(s).) |
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| معلومات مُعتمدة: | 1806213 Office of Polar Programs; 1806213 Office of Polar Programs; 1820883 Office of Polar Programs; 1820883 Office of Polar Programs; 1929170 Office of Integrative Activities; 1929170 Office of Integrative Activities; 80NSSC21K1820 Science Mission Directorate |
| تواريخ الأحداث: | Date Created: 20240411 Latest Revision: 20240425 |
| رمز التحديث: | 20240425 |
| مُعرف محوري في PubMed: | PMC11009396 |
| DOI: | 10.1038/s41598-024-58998-5 |
| PMID: | 38605076 |
| قاعدة البيانات: | MEDLINE |
Find this article in full text from Springer Verlag. 
Full Text Finder | تدمد: | 2045-2322 |
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| DOI: | 10.1038/s41598-024-58998-5 |