DOI: 10.5194/tc-15-2115-2021
论文题名: Glacier Image Velocimetry: An open-source toolbox for easy and rapid calculation of high-resolution glacier velocity fields
作者: Van Wyk De Vries M. ; Wickert A.D.
刊名: Cryosphere
ISSN: 19940416
出版年: 2021
卷: 15, 期: 4 起始页码: 2115
结束页码: 2132
语种: 英语
英文关键词: computer simulation
; glacier
; image resolution
; velocity profile
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). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164821
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
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]. Cryosphere,2021-01-01,15(4)