干旱区生态环境知识资源中心(Arid): 罗布泊湖相沉积物极化散射特性及其环境意义

Arid

	罗布泊湖相沉积物极化散射特性及其环境意义
其他题名	Polarimetric and scattering properties of subsurface saline lacustrine deposits in Lop Nur Lake Basin,China using Synthetic Aperture Radar data
	宫华泽; 邵芸; 王国军; 蔡爱民; 张婷婷
来源期刊	地球物理学报
ISSN	0001-5733
出版年	2013
卷号	56 期号:2 页码:431-440
中文摘要	通过对罗布泊古湖盆区域("大耳朵")湖相沉积物含水量与含盐量、介电性质、地表微地貌等理化参量的分析,本文提出了罗布泊古湖盆区域的散射过程与次地表散射结构;利用全极化测量技术(PolSAR,PolarimetricSynthetic Aperture Radar),本文对不同纹理区域进行了物理散射机制的定量化剖析,同极化相关分析与极化度推算结果表明整个"大耳朵"区域后向散射强烈,亮条带比暗条带的散射机制更为复杂,地表微地貌状态是造成"大耳朵"特征的表观原因.在此基础上,本文利用极化分解技术进一步分离不同散射机制分量,通过定量比较各部分贡献对于"大耳朵"特征的表征能力,提出次地表介质性质(如含盐量)是"大耳朵"特征的根本性成因,相关性可达0.784,同时分析了次地表高含水含盐湖相沉积物在SAR响应中的重要性及其与地表形态之间的动力学形成机制.最后,本文论证了合成孔径雷达(SAR,Synthetic Aperture Radar)在罗布泊地区的穿透能力,预示着SAR遥感技术在干旱区环境研究中的应用潜力.
英文摘要	Analyses about physical and chemical parameters of lacustrine deposits such as moisture,salinity,dielectric property and surface micro-topography,were carried out to investigate the scattering mechanisms and subsurface scattering structure in Lop Nur Lake Basin (the Earregion).Using PolSAR (Polarimetric Synthetic Aperture Radar)technology, physical scattering mechanisms in different texture regions were analyzed quantitatively.The calculated results of the co-polarization correlation and degree of polarization reveal that the whole Earregion produced strong backscattering energy,and the scattering mechanism of bright strip is more complicated than that of grey strip.The formation ofEarfeature is apparently due to the status of surface micro-topography.Then,this paper further extracted the contributions of different scattering mechanisms using polarimetric decomposition algorithm.Based on quantitative comparison among the three parts,subsurface characteristics(e.g.:salinity)are demonstrated to be fundamental cause ofEarfeature,with R square of 0.784.Meanwhile,the results indicate that subsurface lacustrine sediments with high moisture and salinity are important for SAR response,which are also related with surface pattern.The penetrating capability of SAR is proposed to be effective in Lop Nur Lake Basin,which means its significant potential for arid environment study.
中文关键词	罗布泊 ; 极化参数 ; 极化分解 ; 穿透性 ; 湖盆演化
英文关键词	PolSAR Lop Nur PolSAR Polarimetric parameter Polarimetric decomposition Penetration Lake basin evolution
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:4774924
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/229370
作者单位	中国科学院遥感应用研究所, 遥感科学国家重点实验室, 北京 100101, 中国
推荐引用方式 GB/T 7714	宫华泽,邵芸,王国军,等. 罗布泊湖相沉积物极化散射特性及其环境意义[J],2013,56(2):431-440.
APA	宫华泽,邵芸,王国军,蔡爱民,&张婷婷.(2013).罗布泊湖相沉积物极化散射特性及其环境意义.地球物理学报,56(2),431-440.
MLA	宫华泽,et al."罗布泊湖相沉积物极化散射特性及其环境意义".地球物理学报 56.2(2013):431-440.