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DOI	10.1109/TGRS.2020.3024971
	Impact of Soil Permittivity and Temperature Profile on L-Band Microwave Emission of Frozen Soil
	Zheng, Donghai; Li, Xin; Zhao, Tianjie; Wen, Jun; Van Der Velde, Rogier; Schwank, Mike; Wang, Xin; Wang, Zuoliang; Su, Zhongbo
通讯作者	Zheng, DH (通讯作者)，Chinese Acad Sci, Inst Tibetan Plateau Res, Natl Tibetan Plateau Data Ctr, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China.
发表日期	2021
ISSN	0196-2892
EISSN	1558-0644
起始页码	4080
结束页码	4093
卷号	59 期号:5
英文摘要	An unexplored aspect of L-band microwave emission is the impact of soil moisture and soil temperature (SMST) profile dynamics on diurnal brightness temperature (T-B) signatures of frozen soil. This study investigates this effect by comparing the TB simulations of layered (T-B,T-l) and uniform (T-B,T-u) soils using a newly developed integrated land emission model. The multilayer Wilheit model and the single-layer Fresnel model are adopted to compute the smooth soil reflectivity for the layered and uniform soils, respectively. A four-phase dielectric mixing model is used to calculate the soil permittivity (epsilon(s)). A data set of concurrent ELBARA-III TB and SMST profile measurements performed in a seasonally frozen Tibetan meadow ecosystem is used for the analysis. The simulated T-B,T-l considering SMST profile information captures well the ELBARA-III measurements with low biases (<= 6 K) and high correlations (R-2 >= 0.88). TB, u produced based on the Fresnel model using the soil moisture of 2.5 cm is more consistent with the T-B,T- l. The sensitivity test of averaging SMST profile below 2.5 cm leads to maximum differences of 2 K in T-B,T- l simulations, indicating that the TB variations are primary dominated by the SMST dynamics at the surface layer. A sensitivity test of theWilheit model to different's parameterizations shows that the dielectric model of Zhang et al. is comparable to the four-phase dielectric model in simulating TB,l, while the Mironov et al.'s model demonstrates larger biases for frozen soil with, on average, 2.2% clay content, 49.7% sand content, and a bulk density of 1 g.cm(-3).
关键词	DEPENDENT DIELECTRIC MODEL FREEZE-THAW PROCESS MOISTURE RETRIEVAL RADIOMETER OBSERVATIONS RADIATIVE-TRANSFER WATER-CONTENT SMOS PARAMETERIZATION DYNAMICS SURFACES
英文关键词	Frozen soil; L-band radiometry; multilayer soil emission model; soil moisture and soil temperature (SMST) profile; soil permittivity
语种	英语
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记录号	WOS:000642096400033
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/254964
作者单位	[Zheng, Donghai; Li, Xin] Chinese Acad Sci, Inst Tibetan Plateau Res, Natl Tibetan Plateau Data Ctr, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China; [Li, Xin] Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China; [Zhao, Tianjie] Chinese Acad Sci, Aerosp Informat Res Inst, State Key Lab Remote Sensing Sci, Beijing 100101, Peoples R China; [Wen, Jun] Chengdu Univ Informat Technol, Coll Atmospher Sci, Chengdu 610225, Peoples R China; [Van Der Velde, Rogier; Su, Zhongbo] Univ Twente, Fac Geoinformat Sci & Earth Observat, NL-7500 AE Enschede, Netherlands; [Schwank, Mike] Swiss Fed Res Inst WSL, CH-8903 Birmensdorf, Switzerland; [Wang, Xin; Wang, Zuoliang] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Zheng, Donghai,Li, Xin,Zhao, Tianjie,et al. Impact of Soil Permittivity and Temperature Profile on L-Band Microwave Emission of Frozen Soil[J]. 中国科学院西北生态环境资源研究院,2021,59(5).
APA	Zheng, Donghai.,Li, Xin.,Zhao, Tianjie.,Wen, Jun.,Van Der Velde, Rogier.,...&Su, Zhongbo.(2021).Impact of Soil Permittivity and Temperature Profile on L-Band Microwave Emission of Frozen Soil.IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING,59(5).
MLA	Zheng, Donghai,et al."Impact of Soil Permittivity and Temperature Profile on L-Band Microwave Emission of Frozen Soil".IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING 59.5(2021).