Characterizing C-band backscattering from thermokarst lake ice on the Qinghai-Tibet Plateau (EI)

CORC > 寒区旱区环境与工程研究所 > 中科院寒区旱区环境与工程研究所（未分类） > 期刊论文

	Characterizing C-band backscattering from thermokarst lake ice on the Qinghai-Tibet Plateau (EI)
	Tian B.; Li Z.; Engram M. J.; Niu F.; Tang P.; Zou P.; Xu J.
刊名	ISPRS Journal of Photogrammetry and Remote Sensing
	2015
卷号	104 页码:63-76
英文摘要	On the basis of weather observations and field measurements of lake ice, this study investigates multi-temporal C-band VV-polarized radar backscattering values from the thermokarst lakes and alpine meadow on the QTP during the period 2003-2010. In order to understand the scattering mechanism of lake ice, a scattering model is developed for lake ice that updates some assumptions adopted in previously developed models, including the roughness of the ice-water interface and the shape of vertically stacked centimeter-sized bubbles in the lake ice. We conclude the following: First, with a incidence angle range near 24, the backscattering intensities of C-band VV-polarized ENVISAT-ASAR data exhibit a strong dependence on time, which is related to the processes of ice growth and decay on the QTP. Some unique backscattering characteristics of lake ice in this high-altitude region, as compared to those for high-latitude regions, are also discussed and documented in the paper. Secondly, the timing of lake ice-on in fall and ice-off in spring for this region can be identified in radar images by using a threshold of -12. dB for the backscatter intensity of the surrounding alpine meadow. Finally, the results of applying the scattering model indicate that surface scattering from the ice-water interface and volume scattering from gas bubbles embedded in the lake ice are the dominant scattering mechanisms for C-band VV polarized SAR and that the roughness of the ice-water interface and also bubble size are the most sensitive factors. 2015 International Society for Photogrammetry and Remote Sensing, Inc. (ISPRS).
收录类别	EI
语种	英语
内容类型	期刊论文
源URL	[http://ir.casnw.net/handle/362004/27156]
专题	寒区旱区环境与工程研究所_中科院寒区旱区环境与工程研究所（未分类）_期刊论文
推荐引用方式 GB/T 7714	Tian B.,Li Z.,Engram M. J.,et al. Characterizing C-band backscattering from thermokarst lake ice on the Qinghai-Tibet Plateau (EI)[J]. ISPRS Journal of Photogrammetry and Remote Sensing,2015,104:63-76.
APA	Tian B..,Li Z..,Engram M. J..,Niu F..,Tang P..,...&Xu J..(2015).Characterizing C-band backscattering from thermokarst lake ice on the Qinghai-Tibet Plateau (EI).ISPRS Journal of Photogrammetry and Remote Sensing,104,63-76.
MLA	Tian B.,et al."Characterizing C-band backscattering from thermokarst lake ice on the Qinghai-Tibet Plateau (EI)".ISPRS Journal of Photogrammetry and Remote Sensing 104(2015):63-76.