干旱区生态环境知识资源中心(Arid): First mapping of polarization-dependent vegetation optical depth and soil moisture from SMAP L-band radiometry

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DOI	10.1016/j.rse.2023.113970
	First mapping of polarization-dependent vegetation optical depth and soil moisture from SMAP L-band radiometry
	Peng, Zhiqing; Zhao, Tianjie; Shi, Jiancheng; Hu, Lu; Rodriguez-Fernandez, Nemesio J.; Wigneron, Jean -Pierre; Jackson, Thomas J.; Walker, Jeffrey P.; Cosh, Michael H.; Yang, Kun; Lu, Hui; Bai, Yu; Yao, Panpan; Zheng, Jingyao; Wei, Zushuai
通讯作者	Zhao, TJ
来源期刊	REMOTE SENSING OF ENVIRONMENT
ISSN	0034-4257
EISSN	1879-0704
出版年	2024
卷号	302
英文摘要	Soil moisture (SM) and vegetation optical depth (VOD) estimates using passive microwave remote sensing at Lband (1.4 GHz) are essential for attaining a better understanding of water exchanges at the land-atmosphere interface. However, current retrieval algorithms often ignore the polarization dependence of vegetation effects. This study proposed a parameter self-calibrating framework for the multi-channel collaborative algorithm (MCCA) and presented a new SM and the first polarization-dependent VOD product based on the dual-polarized L-band observations at a fixed angle (40 degrees) from the NASA Soil Moisture Active Passive (SMAP) mission. The parameter self-calibrating framework utilizes an information theory-based approach to obtain surface roughness and effective scattering albedo globally. Furthermore, the MCCA does not require auxiliary data for vegetation or soil moisture to constrain the retrieval process. Comparison with other SM and VOD products, such as MT-DCA version 5, DCA, SCA-H, SCA-V from SMAP Level-3 products version 8, and SMAP-IB, demonstrate analogous spatial patterns. The MCCA-derived SM exhibits the lowest unbiased root mean square deviation (ubRMSD, about 0.055 m3/m3), followed by SMAP-IB and DCA (0.061 m3/m3), with an overall Pearson's correlation coefficient of 0.744 (SMAP-IB performed best with R = 0.764) when evaluated against in-situ observations from 18 dense soil moisture networks. The MCCA generates VOD values for both vertical and horizontal polarization, demonstrating a slight polarization difference of vegetation effect at the satellite scale. Both VODs exhibit a strong linear relationship with above-ground biomass and canopy height. The polarization difference of VODs is primarily observed in densely vegetated and arid areas.
英文关键词	Soil moisture Vegetation optical depth MCCA Polarization dependence SMAP
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001148206300001
WOS关键词	PASSIVE MICROWAVE MEASUREMENTS ; SCATTERING ALBEDO ; RETRIEVAL ; EMISSION ; MODEL ; SMOS ; PARAMETERS ; RADIATION ; NETWORK ; VALIDATION
WOS类目	Environmental Sciences ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Environmental Sciences & Ecology ; 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/2XILL650/405328
推荐引用方式 GB/T 7714	Peng, Zhiqing,Zhao, Tianjie,Shi, Jiancheng,et al. First mapping of polarization-dependent vegetation optical depth and soil moisture from SMAP L-band radiometry[J],2024,302.
APA	Peng, Zhiqing.,Zhao, Tianjie.,Shi, Jiancheng.,Hu, Lu.,Rodriguez-Fernandez, Nemesio J..,...&Wei, Zushuai.(2024).First mapping of polarization-dependent vegetation optical depth and soil moisture from SMAP L-band radiometry.REMOTE SENSING OF ENVIRONMENT,302.
MLA	Peng, Zhiqing,et al."First mapping of polarization-dependent vegetation optical depth and soil moisture from SMAP L-band radiometry".REMOTE SENSING OF ENVIRONMENT 302(2024).