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	Validation of a practical normalized soil moisture model with in situ measurements in humid and semi-arid regions
	Zhang D. J.; Li, Z. L.; Tang, R. L.; Tang, B. H.; Wu, H.; Lu, J.; Shao, K.
	2015
关键词	land-surface temperature vegetation index triangle method water content temporal evolution satellite imagery thermal inertia energy fluxes evapotranspiration retrieval
英文摘要	Soil moisture is an important parameter that influences the exchange of water and energy fluxes between the land surface and the atmosphere. Through the simulation by a Soil-Vegetation-Atmosphere Transfer model, Carlson proposed the universal spatial information-based method to determine soil moisture that is insensitive to the initial atmospheric and surface conditions, net radiation, and atmospheric correction. In this study, a practical normalized soil moisture model is established to describe the relationship among the normalized soil moisture (M), the normalized land surface temperature (T*), and the fractional vegetation cover. The dry and wet points are determined using the surface energy balance principle, which has a robust physical basis. This method is applied to retrieve soil moisture for the Soil Moisture-Atmosphere Coupling Experiment campaign in the Walnut Creek watershed, which has a humid climate, and at the Linzestation, which has a semi-arid climate. The validation data are obtained on days of year (DOYs) 182 and 189 in 2002 in the humid region and on DOYs 148 and 180 in 2008 for the semi-arid region; these data collection days are coincident with the overpass of the Landsat Thematic Mapper/Enhanced Thematic Mapper Plus. When the estimates are compared with the in situ measurements of soil water content, the root mean square error is approximately 0.10m(3)m(-3) with a bias of 0.05m(3)m(-3) for the humid region and 0.08m(3)m(-3) with a bias of 0.03m(3)m(-3) for the semi-arid region. These results demonstrate that the practical normalized soil moisture model is applicable in both humid and semi-arid regions.
出处	International Journal of Remote Sensing
卷	36
期	19-20
页	5015-5030
收录类别	SCI
语种	英语
ISSN号	0143-1161
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/38524]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Zhang D. J.,Li, Z. L.,Tang, R. L.,et al. Validation of a practical normalized soil moisture model with in situ measurements in humid and semi-arid regions. 2015.

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