干旱区生态环境知识资源中心(Arid): Explaining Anomalies in SAR and Scatterometer Soil Moisture Retrievals From Dry Soils With Subsurface Scattering

Arid

DOI	10.1109/TGRS.2019.2954771
	Explaining Anomalies in SAR and Scatterometer Soil Moisture Retrievals From Dry Soils With Subsurface Scattering
	Morrison, Keith 1; Wagner, Wolfgang 2
通讯作者	Morrison, Keith
来源期刊	IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
ISSN	0196-2892
EISSN	1558-0644
出版年	2020
卷号	58 期号:3 页码:2190-2197
英文摘要	This article presents the results of a laboratory investigation to explain anomalously high soil moisture estimates observed in retrievals from SAR and scatterometer backscatter, affecting extensive areas of the world associated with arid climates. High-resolution C-band tomographic profiling was applied in experiments to understand the mechanisms underlying these anomalous retrievals. The imagery captured unique high-resolution profiles of the variations in the vertical backscattering patterns through a sandy soil with moisture change. The relative strengths of the surface and subsurface returns were dependent upon both soil moisture and soil structure, incidence-angle, and polarization. Copolarized returns could be dominated by both surface and subsurface returns at times, whereas crosspolarized returns were strongly associated with subsurface features. The work confirms suspicions that anomalous moisture estimates can arise from the presence of subsurface features. Diversity in polarization and incidence angle may provide sufficient diagnostics to flag and correct these erroneous estimates, allowing their incorporation into global soil moisture products.
英文关键词	Radar radar imaging soil moisture anomalies subsurface scattering synthetic aperture radar
类型	Article
语种	英语
国家	England ; Austria
收录类别	SCI-E
WOS记录号	WOS:000519598700053
WOS关键词	RADAR-SCATTERING ; MODEL
WOS类目	Geochemistry & Geophysics ; Engineering, Electrical & Electronic ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Geochemistry & Geophysics ; Engineering ; Remote Sensing ; Imaging Science & Photographic Technology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314714
作者单位	1.Univ Reading, Dept Meteorol, Reading RG6 6BB, Berks, England; 2.TU Wien, Dept Geodesy & Geoinformat, A-1040 Vienna, Austria
推荐引用方式 GB/T 7714	Morrison, Keith,Wagner, Wolfgang. Explaining Anomalies in SAR and Scatterometer Soil Moisture Retrievals From Dry Soils With Subsurface Scattering[J],2020,58(3):2190-2197.
APA	Morrison, Keith,&Wagner, Wolfgang.(2020).Explaining Anomalies in SAR and Scatterometer Soil Moisture Retrievals From Dry Soils With Subsurface Scattering.IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING,58(3),2190-2197.
MLA	Morrison, Keith,et al."Explaining Anomalies in SAR and Scatterometer Soil Moisture Retrievals From Dry Soils With Subsurface Scattering".IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING 58.3(2020):2190-2197.