气候变化领域集成服务门户(CCPortal): Automated detection of ice cliffs within supraglacial debris cover

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DOI	10.5194/tc-12-1811-2018
	Automated detection of ice cliffs within supraglacial debris cover
	Herreid S.; Pellicciotti F.
发表日期	2018
ISSN	19940416
卷号	12 期号:5
英文摘要	Ice cliffs within a supraglacial debris cover have been identified as a source for high ablation relative to the surrounding debris-covered area. Due to their small relative size and steep orientation, ice cliffs are difficult to detect using nadir-looking space borne sensors. The method presented here uses surface slopes calculated from digital elevation model (DEM) data to map ice cliff geometry and produce an ice cliff probability map. Surface slope thresholds, which can be sensitive to geographic location and/or data quality, are selected automatically. The method also attempts to include area at the (often narrowing) ends of ice cliffs which could otherwise be neglected due to signal saturation in surface slope data. The method was calibrated in the eastern Alaska Range, Alaska, USA, against a control ice cliff dataset derived from high-resolution visible and thermal data. Using the same input parameter set that performed best in Alaska, the method was tested against ice cliffs manually mapped in the Khumbu Himal, Nepal. Our results suggest the method can accommodate different glaciological settings and different DEM data sources without a data intensive (high-resolution, multi-data source) recalibration. © Author(s) 2018.
语种	英语
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119140
作者单位	Department of Geography, Faculty of Engineering and Environment, Northumbria University, Newcastle-upon-Tyne, United Kingdom
推荐引用方式 GB/T 7714	Herreid S.,Pellicciotti F.. Automated detection of ice cliffs within supraglacial debris cover[J],2018,12(5).
APA	Herreid S.,&Pellicciotti F..(2018).Automated detection of ice cliffs within supraglacial debris cover.Cryosphere,12(5).
MLA	Herreid S.,et al."Automated detection of ice cliffs within supraglacial debris cover".Cryosphere 12.5(2018).