气候变化领域集成服务门户(CCPortal): Massive Ice Control on Permafrost Coast Erosion and Sensitivity

CCPortal

DOI	10.1029/2020GL087917
	Massive Ice Control on Permafrost Coast Erosion and Sensitivity
	Lim M.; Whalen D.; Martin J.; Mann P.J.; Hayes S.; Fraser P.; Berry H.B.; Ouellette D.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:17
英文摘要	High overall rates of permafrost cliff retreat, coupled with spatial variability, have been accompanied by increased uncertainty over future landscape dynamics. We map long-term (>80 years) retreat of the shoreline and photogrammetrically analyze historic aerial imagery to quantify the processes at a permafrost coast site with massive ground ice. Retreat rates have been relatively constant, but topographic changes show that subsidence is a potentially critical but often ignored component of coastal sensitivity, exceeding landward recession by over three times during the last 24 years. We calibrate novel passive seismic surveys along clear and variable exposures of massive ground ice and then spatially map key subsurface layers. Combining decadal patterns of volumetric change with new ground ice variation maps enables past trends to be interpreted, future volumetric geomorphic behavior to be better constrained, and improves the assessment of permafrost coast sensitivity and the release of carbon-bearing material. ©2020. The Authors.
英文关键词	Aerial photography; Antennas; Ice control; Permafrost; Sensitivity analysis; Aerial imagery; Carbon-bearing materials; Landscape dynamics; Seismic surveys; Spatial variability; Subsurface layer; Topographic changes; Volumetric changes; Ice; airborne sensing; cliff; erosion; permafrost; seismic response; subsidence; topography
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/169785
作者单位	Engineering and Environment, Ellison Building, Northumbria University, Newcastle Upon Tyne, United Kingdom; Natural Resources Canada, Geological Survey of Canada–Atlantic, Dartmouth, NS, Canada; Department of Earth and Environmental Sciences, Dalhousie University, Halifax, NS, Canada; Department of Civil Engineering, Schulich School of Engineering, University of Calgary, Calgary, AB, Canada
推荐引用方式 GB/T 7714	Lim M.,Whalen D.,Martin J.,et al. Massive Ice Control on Permafrost Coast Erosion and Sensitivity[J],2020,47(17).
APA	Lim M..,Whalen D..,Martin J..,Mann P.J..,Hayes S..,...&Ouellette D..(2020).Massive Ice Control on Permafrost Coast Erosion and Sensitivity.Geophysical Research Letters,47(17).
MLA	Lim M.,et al."Massive Ice Control on Permafrost Coast Erosion and Sensitivity".Geophysical Research Letters 47.17(2020).