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Assessment of Soil Moisture SMAP Retrievals and ELBARA-III Measurements in a Tibetan Meadow Ecosystem
Zheng, DH (Zheng, Donghai)1; Wang, X (Wang, Xin)2; van der Velde, R (van der Velde, Rogier)3; Schwank, M (Schwank, Mike)4; Ferrazzoli, P (Ferrazzoli, Paolo)5; Wen, J (Wen, Jun)6; Wang, ZL (Wang, Zuoliang)2; Colliander, A (Colliander, Andreas)7; Bindlish, R (Bindlish, Rajat)8; Su, ZB (Su, Zhongbo)3
Source PublicationIEEE GEOSCIENCE AND REMOTE SENSING LETTERS
2019
Volume16Issue:9Pages:1407-1411
DOI10.1109/LGRS.2019.2897786
Abstract

This letter presents the results evaluating retrievals of liquid water content (theta(liq)) performed with a zero-order radiative transfer (tau-omega) model under frozen and thawed soil conditions from Soil Moisture Active Passive (SMAP) and ELBARA-III brightness temperature (T-B(P) ) measurements collected over a Tibetan meadow ecosystem. A good agreement is found between time series of the SMAP and ELBARA-III measured T-B(P) resulting in a Pearson product-moment coefficient (R) larger than 0.87. Differences noted between the two data sets can be associated with discrepancies in theta(liq) measured in the specific footprints, whereby the SMAP measurements are best explained by the in situ theta(liq). Furthermore, the in situ theta(liq) has a better agreement with the horizontally polarized SMAP and ELBARA-III measurements (T-B(H)) in the cold season, whereas the vertically polarized measurements (T-B(V)) are better correlated with liq in the warm season. With the implementation of new vegetation and surface roughness parameterizations for the tau-omega model, the dynamics of in situ theta(liq) is better reproduced by corresponding retrievals for both frozen and thawed soil conditions, leading to the reduction in the unbiased root-mean-square error (ubRMSE) by more than 31% in comparison with these retrievals using SMAP default parameterizations. Notably, the single-channel algorithm configured with the new parameterizations using SMAP T-B(V) measured during the ascending overpass provides the best theta(liq) retrievals with a ubRMSE of 0.035 m(3).m(-3) that is well within the SMAP mission requirements.

Subject AreaGeosciences
WOS IDWOS:000484210100014
Language英语
Indexed BySCI
KeywordBand Microwave Emission Noah Model Physics Validation Smos Vegetation Temperature
WOS Research AreaGeochemistry & Geophysics ; Engineering ; Remote Sensing ; Imaging Science & Photographic Technology
WOS SubjectGeochemistry & Geophysics ; Engineering, Electrical & Electronic ; Remote Sensing ; Imaging Science & Photographic Technology
Cooperation Status国际
ISSN1545-598X
Department环境变化与地表过程重点实验室
URL查看原文
PublisherIEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/9175
Collection图书馆
Corresponding AuthorZheng, DH (Zheng, Donghai)
Affiliation1.Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing 100101, Peoples R China;
2.Chinese Acad Sci, Key Lab Land Surface Proc & Climate Change Cold &, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Gansu, Peoples R China;
3.Univ Twente, Fac Geoinformat Sci & Earth Observat, NL-7500 AE Enschede, Netherlands;
4.Swiss Fed Res Inst WSL, CH-8903 Birmensdorf, Switzerland;
5.Univ Roma Tor Vergata, Dipartimento Ingn Civile & Ingn Informat, Via Politecn, I-00133 Rome, Italy;
6.Chengdu Univ Informat Technol, Coll Atmospher Sci, Plateau Atmosphere & Environm Key Lab Sichuan Pro, Chengdu 610225, Sichuan, Peoples R China;
7.CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA;
8.NASA, Goddard Space Flight Ctr, Hydrol Sci Lab, Code 916, Greenbelt, MD 20771 USA.
Recommended Citation
GB/T 7714
Zheng, DH ,Wang, X ,van der Velde, R ,et al. Assessment of Soil Moisture SMAP Retrievals and ELBARA-III Measurements in a Tibetan Meadow Ecosystem[J]. IEEE GEOSCIENCE AND REMOTE SENSING LETTERS,2019,16(9):1407-1411.
APA Zheng, DH .,Wang, X .,van der Velde, R .,Schwank, M .,Ferrazzoli, P .,...&Su, ZB .(2019).Assessment of Soil Moisture SMAP Retrievals and ELBARA-III Measurements in a Tibetan Meadow Ecosystem.IEEE GEOSCIENCE AND REMOTE SENSING LETTERS,16(9),1407-1411.
MLA Zheng, DH ,et al."Assessment of Soil Moisture SMAP Retrievals and ELBARA-III Measurements in a Tibetan Meadow Ecosystem".IEEE GEOSCIENCE AND REMOTE SENSING LETTERS 16.9(2019):1407-1411.
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