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DOI | 10.1088/1748-9326/aadd30 |
Modeling the role of preferential snow accumulation in through talik development and hillslope groundwater flow in a transitional permafrost landscape | |
Jafarov, Elchin E.1; Coon, Ethan T.2,3; Harp, Dylan R.1; Wilson, Cathy J.1; Painter, Scott L.2,3; Atchley, Adam L.1; Romanovsky, Vladimir E.4 | |
2018-10-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2018 |
卷号 | 13期号:10 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Through taliks-thawed zones extending through the entire permafrost layer-represent a critical type of heterogeneity that affects water redistribution and heat transport, especially in sloping landscapes. The formation of through taliks as part of the transition from continuous to discontinuous permafrost creates new hydrologic pathways connecting the active layer to sub-permafrost regions, with significant hydrological and biogeochemical consequences. At hilly field sites in the southern Seward Peninsula, AK, patches of deep snow in tall shrubs are associated with higher winter ground temperatures and an anomalously deep active layer. To better understand the thermal-hydrologic controls and consequences of through taliks, we used the coupled surface/subsurface permafrost hydrology model ATS (Advanced Terrestrial Simulator) to simulate through taliks associated with preferentially distributing snow. Scenarios were developed based on an intensively studied hillslope transect on the southern Seward Peninsula, which predominately has taller shrubs midslope and tundra in upslope and downslope areas. The model was forced with detrended meteorological data with snow preferentially distributed at the midslope of the domain to investigate the potential role of vegetation-induced snow trapping in controlling through talik development under conditions typical of the current-day Seward Peninsula. Wesimulated thermal hydrology and talik development for five permafrost conditions ranging in thickness from 17-45 m. For the three thinnest permafrost configurations, a through talik developed, which allowed water from the seasonally thawed layer into sub-permafrost waters, increasing sub-permafrost groundwater flow. These numerical experiments suggest that in the transition from continuous to discontinuous permafrost, through taliks may appear at locations that preferential trap snow and that the appearance of those through taliks may drive significant changes in permafrost hydrology. |
英文关键词 | permafrost hydrology modeling ATS talik |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000448170700001 |
WOS关键词 | ACTIVE LAYER ; ARCTIC TUNDRA ; HYDRAULIC CONDUCTIVITY ; THERMAL-CONDUCTIVITY ; SURFACE ; ALASKA ; HYDROLOGY ; DYNAMICS ; BARROW ; THAW |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/14911 |
专题 | 气候变化 |
作者单位 | 1.Los Alamos Natl Lab, Los Alamos, NM 87545 USA; 2.Oak Ridge Natl Lab, Climate Change Sci Inst, Oak Ridge, TN USA; 3.Oak Ridge Natl Lab, Environm Sci, Oak Ridge, TN USA; 4.Univ Alaska Fairbanks, Inst Geophys, Fairbanks, AK 99775 USA |
推荐引用方式 GB/T 7714 | Jafarov, Elchin E.,Coon, Ethan T.,Harp, Dylan R.,et al. Modeling the role of preferential snow accumulation in through talik development and hillslope groundwater flow in a transitional permafrost landscape[J]. ENVIRONMENTAL RESEARCH LETTERS,2018,13(10). |
APA | Jafarov, Elchin E..,Coon, Ethan T..,Harp, Dylan R..,Wilson, Cathy J..,Painter, Scott L..,...&Romanovsky, Vladimir E..(2018).Modeling the role of preferential snow accumulation in through talik development and hillslope groundwater flow in a transitional permafrost landscape.ENVIRONMENTAL RESEARCH LETTERS,13(10). |
MLA | Jafarov, Elchin E.,et al."Modeling the role of preferential snow accumulation in through talik development and hillslope groundwater flow in a transitional permafrost landscape".ENVIRONMENTAL RESEARCH LETTERS 13.10(2018). |
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