气候变化领域集成服务门户(CCPortal): Glacier Image Velocimetry: An open-source toolbox for easy and rapid calculation of high-resolution glacier velocity fields

CCPortal

DOI	10.5194/tc-15-2115-2021
	Glacier Image Velocimetry: An open-source toolbox for easy and rapid calculation of high-resolution glacier velocity fields
	Van Wyk De Vries M.; Wickert A.D.
发表日期	2021
ISSN	19940416
起始页码	2115
结束页码	2132
卷号	15 期号:4
英文摘要	We present Glacier Image Velocimetry (GIV), an open-source and easy-to-use software toolkit for rapidly calculating high-spatial-resolution glacier velocity fields. Glacier ice velocity fields reveal flow dynamics, ice-flux changes, and (with additional data and modelling) ice thickness. Obtaining glacier velocity measurements over wide areas with field techniques is labour intensive and often associated with safety risks. The recent increased availability of high-resolution, short-repeat-time optical imagery allows us to obtain ice displacement fields using "feature tracking"based on matching persistent irregularities on the ice surface between images and hence, surface velocity over time. GIV is fully parallelized and automatically detects, filters, and extracts velocities from large datasets of images. Through this coupled toolchain and an easy-to-use GUI, GIV can rapidly analyse hundreds to thousands of image pairs on a laptop or desktop computer. We present four example applications of the GIV toolkit in which we complement a glaciology field campaign (Glaciar Perito Moreno, Argentina) and calculate the velocity fields of small mid-latitude (Glacier d'Argentière, France) and tropical glaciers (Volcán Chimborazo, Ecuador), as well as very large glaciers (Vavilov Ice Cap, Russia). Fully commented MATLAB code and a stand-alone app for GIV are available from GitHub and Zenodo Van Wyk de Vries. © 2021 Author(s).
英文关键词	computer simulation; glacier; image resolution; velocity profile
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/202443
作者单位	Department of Earth and Environmental Sciences, University of Minnesota, Minneapolis, MN, United States; Saint Anthony Falls Laboratory, University of Minnesota, Minneapolis, MN, United States
推荐引用方式 GB/T 7714	Van Wyk De Vries M.,Wickert A.D.. Glacier Image Velocimetry: An open-source toolbox for easy and rapid calculation of high-resolution glacier velocity fields[J],2021,15(4).
APA	Van Wyk De Vries M.,&Wickert A.D..(2021).Glacier Image Velocimetry: An open-source toolbox for easy and rapid calculation of high-resolution glacier velocity fields.Cryosphere,15(4).
MLA	Van Wyk De Vries M.,et al."Glacier Image Velocimetry: An open-source toolbox for easy and rapid calculation of high-resolution glacier velocity fields".Cryosphere 15.4(2021).