Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/aaf0cc |
Development of perennial thaw zones in boreal hillslopes enhances potential mobilization of permafrost carbon | |
Walvoord, Michelle A.1; Voss, Clifford I.2; Ebel, Brian A.1; Minsley, Burke J.3 | |
2019 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2019 |
卷号 | 14期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Permafrost thaw alters subsurface flow in boreal regions that in turn influences the magnitude, seasonality, and chemical composition of streamflow. Prediction of these changes is challenged by incomplete knowledge of timing, flowpath depth, and amount of groundwater discharge to streams in response to thaw. One important phenomenon that may affect flow and transport through boreal hillslopes is development of lateral perennial thaw zones (PTZs), the existence of which is here supported by geophysical observations and cryohydrogeologic modeling. Model results link thaw to enhanced and seasonally-extended baseflow, which have implications for mobilization of soluble constituents. Results demonstrate the sensitivity of PTZ development to organic layer thickness and near-surface factors that mediate heat exchange at the atmosphere/ground-surface interface. Study findings suggest that PTZs serve as a detectable precursor to accelerated permafrost degradation. This study provides important contextual insight on a fundamental thermo-hydrologic process that can enhance terrestrial-to-aquatic transfer of permafrost carbon, nitrogen, and mercury previously sequestered in thawing watersheds. |
英文关键词 | permafrost cryohydrogeology boreal geophysics Alaska |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000456203200001 |
WOS关键词 | NEAR-SURFACE PERMAFROST ; GROUNDWATER-FLOW ; YUKON RIVER ; NORTHERN ALASKA ; CLIMATE-CHANGE ; ARCTIC TUNDRA ; TRANSPORT ; SOIL ; DEGRADATION ; DYNAMICS |
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/26084 |
专题 | 气候变化 |
作者单位 | 1.US Geol Survey, Box 25046, Denver, CO 80225 USA; 2.US Geol Survey, Earth Syst Proc Div, 345 Middlefield Rd, Menlo Pk, CA 94025 USA; 3.US Geol Survey, Geol Geophys & Geochem Sci Ctr, Box 25046, Denver, CO 80225 USA |
推荐引用方式 GB/T 7714 | Walvoord, Michelle A.,Voss, Clifford I.,Ebel, Brian A.,et al. Development of perennial thaw zones in boreal hillslopes enhances potential mobilization of permafrost carbon[J]. ENVIRONMENTAL RESEARCH LETTERS,2019,14(1). |
APA | Walvoord, Michelle A.,Voss, Clifford I.,Ebel, Brian A.,&Minsley, Burke J..(2019).Development of perennial thaw zones in boreal hillslopes enhances potential mobilization of permafrost carbon.ENVIRONMENTAL RESEARCH LETTERS,14(1). |
MLA | Walvoord, Michelle A.,et al."Development of perennial thaw zones in boreal hillslopes enhances potential mobilization of permafrost carbon".ENVIRONMENTAL RESEARCH LETTERS 14.1(2019). |
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