干旱区生态环境知识资源中心(Arid): Measuring Sand Dune Migration Rates with COSI-Corr and Landsat: Opportunities and Challenges

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DOI	10.3390/rs11202423
	Measuring Sand Dune Migration Rates with COSI-Corr and Landsat: Opportunities and Challenges
	Baird, Thomas 1; Bristow, Charles S.2; Vermeesch, Pieter 1
通讯作者	Baird, Thomas
来源期刊	REMOTE SENSING
EISSN	2072-4292
出版年	2019
卷号	11 期号:20
英文摘要	It has been over a decade since COSI-Corr, the Co-Registration of Optically Sensed Images and Correlation, was first used to produce a raster map of sand dune movement, however, no studies have yet applied it to the full Landsat archive. The orthorectified and geolocated Landsat Level-1 Precision Terrain (L1TP) products offer the opportunity to simplify the COSI-Corr pre-processing steps, allowing an automated workflow to be devised. In the Bodele Depression, Chad, this automated workflow has calculated average dune speeds of 15.83 m/year and an increase in dune movement of 2.56 m/year +/- 12.58 m/year from 1987 to 2009. However, this increase does not stem from a systematic increase in dune mobility. The fastest 25% of dunes from 1987 to 1998 reduced their speed by 18.16%. The overall increase stems from the acceleration of features previously moving under 13.30 m/year. While successfully applied to the Bodele Depression, the automated workflow produces highly variable outputs when applied to the Grand Erg Oriental, Algeria. Variations within path/row scene pairings are caused by the use of mobile features, such as dune crests, as ground control points (GCPs). This has the potential to warp Landsat scenes during the L1TP processing, potentially obfuscating dune migration. Two factors appear to be crucial in determining whether a Landsat scene is suitable for COSI-Corr analysis. Firstly, dune mobility must exceed the misregistration criteria. Secondly, GPCs should be located on static features such as bedrock outcrops.
英文关键词	sand dune COSI-Corr migration Landsat Sahara
类型	Article
语种	英语
国家	England
开放获取类型	gold, Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000498395800091
WOS关键词	WESTERN DESERT ; BODELE DEPRESSION ; SURFACE ; DEFORMATION ; GLACIER ; BARCHAN ; EARTHQUAKE ; ACCURACY ; MOVEMENT ; PATTERNS
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
EI主题词	2019-10-01
来源机构	University of London
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310192
作者单位	1.UCL, Dept Earth Sci, 5 Gower Pl, London WC1E 6BS, England; 2.Birkbeck Univ London, Dept Earth & Planetary Sci, Malet St, London WC1E 7HX, England
推荐引用方式 GB/T 7714	Baird, Thomas,Bristow, Charles S.,Vermeesch, Pieter. Measuring Sand Dune Migration Rates with COSI-Corr and Landsat: Opportunities and Challenges[J]. University of London,2019,11(20).
APA	Baird, Thomas,Bristow, Charles S.,&Vermeesch, Pieter.(2019).Measuring Sand Dune Migration Rates with COSI-Corr and Landsat: Opportunities and Challenges.REMOTE SENSING,11(20).
MLA	Baird, Thomas,et al."Measuring Sand Dune Migration Rates with COSI-Corr and Landsat: Opportunities and Challenges".REMOTE SENSING 11.20(2019).