Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/aaf932 |
Inference of the impact of wildfire on permafrost and active layer thickness in a discontinuous permafrost region using the remotely sensed active layer thickness (ReSALT) algorithm | |
Michaelides, Roger J.1; Schaefer, Kevin2; Zebker, Howard A.1; Parsekian, Andrew3; Liu, Lin4; Chen, Jingyi5; Natali, Susan6; Ludwig, Sarah6; Schaefer, Sean R.7 | |
2019-03-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2019 |
卷号 | 14期号:3 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Peoples R China |
英文摘要 | The Yukon-Kuskokwim (YK) Delta is a region of discontinuous permafrost in the subarctic of southwestern Alaska. Many wildfires have occurred in the YK Delta between 1971-2015, impacting vegetation cover, surface soil moisture, and the active layer. Herein, we demonstrate that the remotely sensed active layer thickness (ReSALT) algorithm can resolve the post-fire active layer dynamics of tundra permafrost. We generated a stack of Advanced Land Observing Satellite Phased Array type L-band Synthetic Aperture Radar interferograms over a study region in the YK Delta spanning 2007-2010. We applied ReSALT to this stack of interferograms to measure seasonal subsidence associated with the freezing and thawing of the active layer and subsidence trends associated with wildfire. We isolated two wildfire-induced subsidence signatures, associated with the active layer and the permafrost layer. We demonstrate that InSAR is sensitive to increases in active layer thickness following wildfire, which recovers to pre-fire values after approximately 25 years. Simultaneously, we show that fire gradually thins the permafrost layer by 4 m, which recovers to pre-fire thickness after 70 years. |
英文关键词 | permafrost wildfire InSAR radar remote sensing geophysics active layer Arctic |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000461665400001 |
WOS关键词 | FIRE DISTURBANCE ; CLIMATE-CHANGE ; ARCTIC TUNDRA ; DEGRADATION ; ALASKA ; THERMOKARST ; SUBSIDENCE ; VALLEY ; CARBON ; BARROW |
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/35446 |
专题 | 气候变化 |
作者单位 | 1.Stanford Univ, Dept Geophys, Stanford, CA 94305 USA; 2.Univ Colorado, Cooperat Inst Res Environm Sci, Natl Snow & Ice Data Ctr, Boulder, CO 80309 USA; 3.Univ Wyoming, Dept Geol & Geophys, Laramie, WY 82070 USA; 4.Chinese Univ Hong Kong, Fac Sci, Earth Syst Sci Programme, Hong Kong, Peoples R China; 5.Dept Aerosp Engn & Engn Mech, 210 E 24st St,WRW Bldg, Austin, TX 78712 USA; 6.Woods Hole Res Ctr, 149 Woods Hole Rd, Falmouth, MA 02540 USA; 7.Depaul Univ, Chicago, IL 60604 USA |
推荐引用方式 GB/T 7714 | Michaelides, Roger J.,Schaefer, Kevin,Zebker, Howard A.,et al. Inference of the impact of wildfire on permafrost and active layer thickness in a discontinuous permafrost region using the remotely sensed active layer thickness (ReSALT) algorithm[J]. ENVIRONMENTAL RESEARCH LETTERS,2019,14(3). |
APA | Michaelides, Roger J..,Schaefer, Kevin.,Zebker, Howard A..,Parsekian, Andrew.,Liu, Lin.,...&Schaefer, Sean R..(2019).Inference of the impact of wildfire on permafrost and active layer thickness in a discontinuous permafrost region using the remotely sensed active layer thickness (ReSALT) algorithm.ENVIRONMENTAL RESEARCH LETTERS,14(3). |
MLA | Michaelides, Roger J.,et al."Inference of the impact of wildfire on permafrost and active layer thickness in a discontinuous permafrost region using the remotely sensed active layer thickness (ReSALT) algorithm".ENVIRONMENTAL RESEARCH LETTERS 14.3(2019). |
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