Estimating Crop Albedo in the Application of a Physical Model Based on   the Law of Energy Conservation and Spectral Invariants

doi:10.3390/rs71115536

CORC > 北京大学 > 地球与空间科学学院

	Estimating Crop Albedo in the Application of a Physical Model Based on the Law of Energy Conservation and Spectral Invariants
	Peng, Jingjing ; Fan, Wenjie ; Xu, Xiru ; Wang, Lizhao ; Liu, Qinhuo ; Li, Jvcai ; Zhao, Peng
刊名	REMOTE SENSING
	2015
关键词	albedo crop spectral invariant BIDIRECTIONAL REFLECTANCE MODEL PHOTON RECOLLISION PROBABILITY MONTE-CARLO METHOD FOREST ALBEDO MODIS BRDF SURFACE SNOW SOIL SIMULATION CANOPIES
DOI	10.3390/rs71115536
英文摘要	Albedo characterizes the radiometric interface of land surfaces, especially vegetation, and the atmosphere. Albedo is a critical input to many models, such as crop growth models, hydrological models and climate models. For the extensive attention to crop monitoring, a physical albedo model for crops is developed based on the law of energy conservation and spectral invariants, which is derived from a prior forest albedo model. The model inputs have been efficiently and physically parameterized, including the dependency of albedo on the solar zenith/azimuth angle, the fraction of diffuse skylight in the incident radiance, the canopy structure, the leaf reflectance/transmittance and the soil reflectance characteristics. Both the anisotropy of soil reflectance and the clumping effect of crop leaves at the canopy scale are considered, which contribute to the improvement of the model accuracy. The comparison between the model results and Monte Carlo simulation results indicates that the canopy albedo has high accuracy with an RMSE < 0.005. The validation using ground measurements has also demonstrated the reliability of the model and that it can reflect the interaction mechanism between radiation and the canopy-soil system.; Open Fund of State Key Laboratory of Remote Sensing Science [OFSLRSS201518]; Major State Basic Research Development Program of China [2013CB733402]; SCI(E); EI; ARTICLE; rspeggy@163.com; fanwj@pku.edu.cn; xrxurs@126.com; wlz1220@sina.com; liuqh@radi.ac.cn; 1401210311@pku.edu.cn; zhaopengowen@126.com; 11; 15536-15560; 7
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/436088]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Peng, Jingjing,Fan, Wenjie,Xu, Xiru,et al. Estimating Crop Albedo in the Application of a Physical Model Based on the Law of Energy Conservation and Spectral Invariants[J]. REMOTE SENSING,2015.
APA	Peng, Jingjing.,Fan, Wenjie.,Xu, Xiru.,Wang, Lizhao.,Liu, Qinhuo.,...&Zhao, Peng.(2015).Estimating Crop Albedo in the Application of a Physical Model Based on the Law of Energy Conservation and Spectral Invariants.REMOTE SENSING.
MLA	Peng, Jingjing,et al."Estimating Crop Albedo in the Application of a Physical Model Based on the Law of Energy Conservation and Spectral Invariants".REMOTE SENSING (2015).