DOI: 10.1016/j.jag.2017.09.002
Scopus记录号: 2-s2.0-85032220086
论文题名: Seasonal and multi-year surface displacements measured by DInSAR in a High Arctic permafrost environment
作者: Rudy A ; C ; A ; , Lamoureux S ; F ; , Treitz P ; , Short N ; , Brisco B
刊名: International Journal of Applied Earth Observation and Geoinformation
ISSN: 15698432
出版年: 2018
卷: 64 起始页码: 51
结束页码: 61
语种: 英语
英文关键词: Active layer dynamics
; Differential interferometry
; Displacement
; High arctic
; Permafrost degradation
; SAR
Scopus关键词: active layer
; displacement
; environmental change
; interferometry
; permafrost
; RADARSAT
; synthetic aperture radar
; thawing
; Arctic
英文摘要: Arctic landscapes undergo seasonal and long-term changes as the active layer thaws and freezes, which can result in localized or irregular subsidence leading to the formation of thermokarst terrain. Differential Interferometric Synthetic Aperture Radar (DInSAR) is a technique capable of measuring ground surface displacements resulting from thawing permafrost at centimetre precision and is quickly gaining acceptance as a means of measuring ground displacement in permafrost regions. Using RADARSAT-2 stacked DInSAR data from 2013 and 2015 we determined the magnitude and patterns of land surface change in a continuous permafrost environment. At our study site situated in the Canadian High Arctic, DInSAR seasonal ground displacement patterns were consistent with field observations of permafrost degradation. As expected, many DInSAR values are close to the detection threshold (i.e., 1 cm) and therefore do not indicate significant change; however, DInSAR seasonal ground displacement patterns aligned well with climatological and soil conditions and offer geomorphological insight into subsurface processes in permafrost environments. While our dataset is limited to two years of data representing a three-year time period, the displacements derived from DInSAR provide insight into permafrost change in a High Arctic environment and demonstrate that DInSAR is an applicable tool for understanding environmental change in remote permafrost regions. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79920
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Geography and Planning, Queen's University, Kingston, Ontario, Canada; Natural Resources Canada, Ottawa, Ontario, Canada
Recommended Citation:
Rudy A,C,A,et al. Seasonal and multi-year surface displacements measured by DInSAR in a High Arctic permafrost environment[J]. International Journal of Applied Earth Observation and Geoinformation,2018-01-01,64