气候变化领域集成服务门户(CCPortal): Wildfire-Initiated Talik Development Exceeds Current Thaw Projections: Observations and Models From Alaska's Continuous Permafrost Zone

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DOI	10.1029/2020GL087565
	Wildfire-Initiated Talik Development Exceeds Current Thaw Projections: Observations and Models From Alaska's Continuous Permafrost Zone
	Rey D.M.; Walvoord M.A.; Minsley B.J.; Ebel B.A.; Voss C.I.; Singha K.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:15
英文摘要	As the Arctic warms and wildfire occurrence increases, talik formation in permafrost regions is projected to expand and affect the cycling of water and carbon. Yet, few unified field and modeling studies have examined this process in detail, particularly in areas of continuous permafrost. We address this gap by presenting multimethod, multiseasonal geophysical measurements of permafrost and liquid-water content that reveal substantial talik development in response to recent wildfire in continuous permafrost of boreal Alaska. Results from observation-based cryohydrogeologic model simulations suggest that predisturbance subsurface conditions are key factors influencing thaw response to fire disturbance and air temperature warming. Our high-resolution integrated study illustrates enhanced vulnerability of boreal continuous permafrost, with observed talik formation that exceeds coarse-scale model projections by ~100 years even under the most extreme future emissions scenario. Results raise important scaling questions for representing extreme permafrost thaw phenomena of growing widespread importance in large-scale predictive models. ©2020. The Authors.
英文关键词	Fires; Permafrost; Thawing; Coarse-scale models; Emissions scenarios; Field and model studies; Geophysical measurements; Liquid water content; Permafrost region; Predictive models; Subsurface conditions; Predictive analytics; air temperature; environmental disturbance; hydrogeology; permafrost; snowmelt; soil emission; thawing; vulnerability; wildfire; Alaska; Arctic; United States
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170015
作者单位	Water Mission Area-Earth System Processes Division, U.S. Geological Survey, Lakewood, CO, United States; Hydrologic Science and Engineering Program, Colorado School of Mines, Golden, CO, United States; Geology, Geophysics, and Geochemistry Science Center, U.S. Geological Survey, Lakewood, CO, United States; Earth System Processes Division, U.S. Geological Survey, Menlo Park, CA, United States
推荐引用方式 GB/T 7714	Rey D.M.,Walvoord M.A.,Minsley B.J.,et al. Wildfire-Initiated Talik Development Exceeds Current Thaw Projections: Observations and Models From Alaska's Continuous Permafrost Zone[J],2020,47(15).
APA	Rey D.M.,Walvoord M.A.,Minsley B.J.,Ebel B.A.,Voss C.I.,&Singha K..(2020).Wildfire-Initiated Talik Development Exceeds Current Thaw Projections: Observations and Models From Alaska's Continuous Permafrost Zone.Geophysical Research Letters,47(15).
MLA	Rey D.M.,et al."Wildfire-Initiated Talik Development Exceeds Current Thaw Projections: Observations and Models From Alaska's Continuous Permafrost Zone".Geophysical Research Letters 47.15(2020).