干旱区生态环境知识资源中心(Arid): Forward Simulation of Multi-Frequency Microwave Brightness Temperature over Desert Soils in Kuwait and Comparison with Satellite Observations

Arid

DOI	10.3390/rs11141647
	Forward Simulation of Multi-Frequency Microwave Brightness Temperature over Desert Soils in Kuwait and Comparison with Satellite Observations
	AlJassar, Hala K.1; Temimi, Marouane 2; Entekhabi, Dara 3; Petrov, Peter 4; AlSarraf, Hussain 5; Kokkalis, Panagiotis 1; Roshni, Nair 1
通讯作者	AlJassar, Hala K.
来源期刊	REMOTE SENSING
ISSN	2072-4292
出版年	2019
卷号	11 期号:14
英文摘要	In this study, we address the variations of bare soil surface microwave brightness temperatures and evaluate the performance of a dielectric mixing model over the desert of Kuwait. We use data collected in a field survey and data obtained from NASA Soil Moisture Active Passive (SMAP), European Space Agency Soil Moisture and Ocean Salinity (SMOS), Advanced Microwave Scanning Radiometer 2 (AMSR2), and Special Sensor Microwave/Imager (SSM/I). In situ measurements are collected during two intensive field campaigns over bare, flat, and homogeneous soil terrains in the desert of Kuwait. Despite the prevailing dry desert environment, a large range of soil moisture values was monitored, due to precedent rain events and subsequent dry down. The mean relative difference (MRD) is within the range of +/- 0.005 m(3)m(-3) during the two sampling days. This reflects consistency of soil moisture in space and time. As predicted by the model, the higher frequency channels (18 to 19 GHz) demonstrate reduced sensitivity to surface soil moisture even in the absence of vegetation, topography and heterogeneity. In the 6.9 to 10.7 GHz range, only the horizontal polarization is sensitive to surface soil moisture. Instead, at the frequency of 1.4 GHz, both polarizations are sensitive to soil moisture and span a large dynamic range as predicted by the model. The error statistics of the difference between observed satellite brightness temperature (Tb) (excluding SMOS data due to radio frequency interference, RFI) and simulated brightness temperatures (Tbs) show values of Root Mean Square Deviation (RMSD) of 5.05 K at vertical polarization and 4.88 K at horizontal polarization. Such error could be due to the performance of the dielectric mixing model, soil moisture sampling depth and the impact of parametrization of effective temperature and roughness.
英文关键词	satellite microwave brightness temperature volumetric soil moisture (VSM) soil roughness dielectric mixing model desert field campaign
类型	Article
语种	英语
国家	Kuwait ; U Arab Emirates ; USA
开放获取类型	gold, Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000480527800017
WOS关键词	MOISTURE RETRIEVAL ; DIELECTRIC BEHAVIOR ; SURFACE-ROUGHNESS ; WET SOIL ; EMISSION ; MODEL ; VALIDATION ; SMOS ; PARAMETERIZATION ; STABILITY
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Environmental Sciences & Ecology ; Geology ; 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/2XILL650/218395
作者单位	1.Kuwait Univ, Dept Phys, POB 5969, Safat 13060, Kuwait; 2.Khalifa Univ Sci & Technol, Masdar Inst, Civil Infrastruct & Environm Engn Dept, POB 54224, Abu Dhabi, U Arab Emirates; 3.MIT, Dept Civil & Environm Engn, Cambridge, MA 02139 USA; 4.Kuwait Inst Sci Res, Disaster Management Program, POB 24885, Safat 13109, Kuwait; 5.Amer Univ Kuwait, Dept Math & Nat Sci, POB 3323, Safat 13034, Kuwait
推荐引用方式 GB/T 7714	AlJassar, Hala K.,Temimi, Marouane,Entekhabi, Dara,et al. Forward Simulation of Multi-Frequency Microwave Brightness Temperature over Desert Soils in Kuwait and Comparison with Satellite Observations[J],2019,11(14).
APA	AlJassar, Hala K..,Temimi, Marouane.,Entekhabi, Dara.,Petrov, Peter.,AlSarraf, Hussain.,...&Roshni, Nair.(2019).Forward Simulation of Multi-Frequency Microwave Brightness Temperature over Desert Soils in Kuwait and Comparison with Satellite Observations.REMOTE SENSING,11(14).
MLA	AlJassar, Hala K.,et al."Forward Simulation of Multi-Frequency Microwave Brightness Temperature over Desert Soils in Kuwait and Comparison with Satellite Observations".REMOTE SENSING 11.14(2019).