Recognition of salt crust types by means of PolSAR to reflect the fluctuation processes of an ancient lake in Lop Nur

	Recognition of salt crust types by means of PolSAR to reflect the fluctuation processes of an ancient lake in Lop Nur
	Liu, Chang-An 1; Gong, Huaze 1; Shao, Yun 1; Yang, Zhi 1; Liu, Long 1; Geng, Yuyang 1
刊名	Remote Sensing of Environment
	2016
卷号	175 页码:148-157
关键词	SATELLITE SENSOR DATA MODIS CLOUD MASK AVHRR NDVI DATA GREEN-UP DATE VEGETATION DYNAMICS MONITORING VEGETATION HARMONIC-ANALYSIS FOURIER-ANALYSIS NOISE-REDUCTION DATA SET
通讯作者	Gong, Huaze (gonghz@radi.ac.cn)
英文摘要	Lop Nur once was a huge lake located in northwestern China. Its environmental evolution is significant for understanding historical global climate change. At present, there is no surface water in Lop Nur Lake Basin, and on SAR images it looks like an "Ear". The objective of this article is to recognize different types of salt crust by surface roughness parameters and interpret their environmental meanings in Lop Nur. Surface roughness parameter estimation, by means of microwave remote sensing technology, is a topic which is intensively studied yet not solved satisfactorily. In this article, the potential of using Polarimetric Synthetic Aperture Radar (PolSAR) acquisitions for the estimation of surface roughness parameter in Lop Nur Lake Basin is investigated. A new parameter Slis proposed to characterize surface roughness and to discriminate salt crust types. Through the analysis of scattering mechanisms, the physical meaning of the PolSAR parameter Single Bounce Eigenvalue Relative Difference (SERD) is reinterpreted and it is used to retrieve parameterSl. A good linear correlation between the measured surface roughness parameter Sland SERD with an R2value of 0.72 was obtained. Furthermore, the distributions of different salt crusts in the certain lake area were analyzed. Based on hypotheses of the evolution of surface salt crust and the drying-up cycle of lakes, the fluctuation processes of an ancient lake in Lop Nur were discussed theoretically. These can help to have a better understanding of environmental changes in arid and semi-arid regions. © 2016 The Authors. Published by Elsevier Inc.
学科主题	Environmental Sciences & Ecology; Remote Sensing; Imaging Science & Photographic Technology
类目[WOS]	Environmental Sciences ; Remote Sensing ; Imaging Science & Photographic Technology
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:20160201802256
内容类型	期刊论文
源URL	[http://ir.radi.ac.cn/handle/183411/39156]
专题	遥感与数字地球研究所_SCI/EI期刊论文_期刊论文
作者单位	1. Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Datun Road, Beijing 2.100101, China 3. University of Chinese Academy of Science, Beijing 4.100049, China
推荐引用方式 GB/T 7714	Liu, Chang-An,Gong, Huaze,Shao, Yun,et al. Recognition of salt crust types by means of PolSAR to reflect the fluctuation processes of an ancient lake in Lop Nur[J]. Remote Sensing of Environment,2016,175:148-157.
APA	Liu, Chang-An,Gong, Huaze,Shao, Yun,Yang, Zhi,Liu, Long,&Geng, Yuyang.(2016).Recognition of salt crust types by means of PolSAR to reflect the fluctuation processes of an ancient lake in Lop Nur.Remote Sensing of Environment,175,148-157.
MLA	Liu, Chang-An,et al."Recognition of salt crust types by means of PolSAR to reflect the fluctuation processes of an ancient lake in Lop Nur".Remote Sensing of Environment 175(2016):148-157.