气候变化领域集成服务门户(CCPortal): Characterization of ice shelf fracture features using ICESat-2

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DOI	10.1016/j.rse.2020.112266
	Characterization of ice shelf fracture features using ICESat-2 – A case study over the Amery Ice Shelf
	Wang S.; Alexander P.; Wu Q.; Tedesco M.; Shu S.
发表日期	2021
ISSN	00344257
卷号	255
英文摘要	Fractures are important structural features that affect the stress condition and stability of ice shelves. Previous studies have mainly focused on the measurement of fractures in the horizontal dimension. However, the vertical morphology of fractures could also be potentially important in determining their evolution and role in ice shelf stability. In this regard, the dense and high-resolution surface elevation measurements collected by the Ice, Cloud, and Land Elevation Satellite-2 (ICESat-2) provide an excellent opportunity for studying fractures in the vertical dimension over a regional scale. Here we developed an object-oriented algorithm to automatically detect and characterize fracture features (including rifts, surface fractures, and the surface expressions of basal fractures) from ICESat-2 data. We successfully applied the algorithm to ICESat-2 L3A Land Ice Height (ATL06) data over the Amery Ice Shelf in East Antarctica, and retrieved the vertical structural information of two major fracture fields. The detected fracture features match well with the visible fracture lines in Landsat-8 satellite imagery, and the edges of fracture features are well-captured from the ATL06 data. We analyzed the fracture patterns in terms of surface depth, width, vertical shape, length, and orientation. We found that the fracture feature depth is a key factor determining the formation of new fractures and the spatial pattern of depth is closely related to rift formation. We anticipate that further application of the object-oriented method over other ice shelves will produce important insights regarding fracture formation and ice shelf vulnerability by combining ICESat-2-derived vertical information with the horizontal structure retrieved from satellite imagery. © 2020 Elsevier Inc.
英文关键词	Antarctica; Fracture; Ice shelf; ICESat-2; Vertical structure
语种	英语
scopus关键词	Feature extraction; Fracture; Morphology; Satellite imagery; Land elevation satellites; Object oriented method; Stress condition; Structural feature; Structural information; Surface elevations; Surface expression; Vertical dimensions; Ice; algorithm; ice shelf; Landsat; satellite data; satellite imagery; vulnerability; Amery Ice Shelf; Antarctica; East Antarctica
来源期刊	Remote Sensing of Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178972
作者单位	Department of Geography, Earth and Environmental Systems Institute (EESI), Institute for Computational and Data Sciences (ICDS), The Pennsylvania State University, University ParkPA 16802, United States; Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10964, United States; NASA Goddard Institute for Space Studies, New York, NY 10025, United States; Department of Geography, University of Tennessee, Knoxville, TN 37996, United States; Department of Geography and Planning, Appalachian State University, Boone, NC 28608, United States
推荐引用方式 GB/T 7714	Wang S.,Alexander P.,Wu Q.,等. Characterization of ice shelf fracture features using ICESat-2 – A case study over the Amery Ice Shelf[J],2021,255.
APA	Wang S.,Alexander P.,Wu Q.,Tedesco M.,&Shu S..(2021).Characterization of ice shelf fracture features using ICESat-2 – A case study over the Amery Ice Shelf.Remote Sensing of Environment,255.
MLA	Wang S.,et al."Characterization of ice shelf fracture features using ICESat-2 – A case study over the Amery Ice Shelf".Remote Sensing of Environment 255(2021).