气候变化领域集成服务门户(CCPortal): Global Sensitivity Analysis of the L-MEB Model for Retrieving Soil Moisture

CCPortal

DOI	10.1109/TGRS.2015.2509176
	Global Sensitivity Analysis of the L-MEB Model for Retrieving Soil Moisture
	Wang, Zengyan; Che, Tao; Liou, Yuei-An
发表日期	2016
ISSN	0196-2892
EISSN	1558-0644
起始页码	2949
结束页码	2962
卷号	54 期号:5
英文摘要	A global sensitivity analysis utilizing the extended Fourier amplitude sensitivity test is used to determine the parameter sensitivity of the L-band microwave emission of the biosphere (L-MEB) model. The results are analyzed from two perspectives of calibration and inversion. First, the parameters of surface soil moisture, soil roughness factor, vegetation optical depth at nadir, and effective land surface temperature are the four most sensitive parameters in the L-MEB model, demonstrating their possibility to be retrieved in the multiparameter retrieval approaches. Then, the high total sensitivity index (TSI) values of surface soil temperature in the analyses emphasize the importance of high-precision land surface temperature data in the surface soil moisture retrievals, especially for rougher or more vegetated surface conditions. Finally, our analysis indicates that TSI values are high for the soil surface roughness and vegetation optical depth model parameters but low for the vegetation structure, single scattering albedo, and soil roughness coefficient model parameters at incidence angles near nadir. This suggests that calibration experiments performed at small incidence angles may be appropriate for some but not all of the model parameters, which characterize the effect of soil surface roughness and vegetation on the terrestrial brightness temperature. Consequently, new calibration procedures that account for the different relative sensitivities of these model parameters at larger incidence angles may need to be developed in the future.
英文关键词	Global sensitivity analysis (SA); L-band microwave emission of the biosphere (L-MEB); passive microwave remote sensing; soil moisture
WOS研究方向	Geochemistry & Geophysics ; Engineering ; Remote Sensing ; Imaging Science & Photographic Technology
WOS类目	Geochemistry & Geophysics ; Engineering, Electrical & Electronic ; Remote Sensing ; Imaging Science & Photographic Technology
WOS关键词	PROCESS RADIOBRIGHTNESS MODEL ; BAND MICROWAVE EMISSION ; COUPLED HEAT ; BRIGHTNESS TEMPERATURES ; PRAIRIE GRASSLAND ; NEURAL-NETWORK ; 1.4 GHZ ; POLARIZATION ; VEGETATION ; FREQUENCY
WOS记录号	WOS:000374968500037
来源期刊	IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/241036
作者单位	[Wang, Zengyan] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Key Lab Remote Sensing Gansu Prov, Lanzhou 730000, Peoples R China; [Wang, Zengyan] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Che, Tao] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Heihe Remote Sensing Expt Res Stn, Lanzhou 730000, Peoples R China; [Che, Tao] Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China; [Liou, Yuei-An] Natl Cent Univ, Ctr Space & Remote Sensing Res, Taoyuan 32001, Taiwan; [Liou, Yuei-An] Taiwan Geog Informat Syst Ctr, Taipei 10092, Taiwan; [Liou, Yuei-An] Taiwan Grp Earth Observat, Hsinchu 30274, Taiwan
推荐引用方式 GB/T 7714	Wang, Zengyan,Che, Tao,Liou, Yuei-An. Global Sensitivity Analysis of the L-MEB Model for Retrieving Soil Moisture[J]. 中国科学院西北生态环境资源研究院,2016,54(5).
APA	Wang, Zengyan,Che, Tao,&Liou, Yuei-An.(2016).Global Sensitivity Analysis of the L-MEB Model for Retrieving Soil Moisture.IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING,54(5).
MLA	Wang, Zengyan,et al."Global Sensitivity Analysis of the L-MEB Model for Retrieving Soil Moisture".IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING 54.5(2016).