气候变化领域集成服务门户(CCPortal): FASPECT: A model of leaf optical properties accounting for the differences between upper and lower faces

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DOI	10.1016/j.rse.2020.112205
	FASPECT: A model of leaf optical properties accounting for the differences between upper and lower faces
	Jiang J.; Comar A.; Weiss M.; Baret F.
发表日期	2021
ISSN	00344257
卷号	253
英文摘要	Many plant species have distinct optical properties between upper and lower leaf faces. These differences between faces are mainly attributed to the non-homogeneous distribution of absorbing and scattering materials within the leaf depth as well as particular surface features of both epidermises. We proposed the FASPECT model which is an evolution of the PROSPECT model to describe the differences in reflectance and transmittance between leaf faces. The upper and lower epidermis layers are characterized by distinct wavelength-independent reflectivities. Leaf mesophyll is made of a palisade and a spongy parenchyma layers using two parameters that describe the distribution of pigments and leaf structure between these two layers. As compared to the original PROSPECT model that treats the two leaf faces symmetrically, six additional parameters are required to describe the differences in leaf optical properties between the two faces. The specific absorption coefficients of chlorophyll and carotenoids have been recalibrated for the FASPECT model over a dedicated dataset. FASPECT was validated over eight datasets and compared with PROSPECT-5 and PROSPECT-D as well as with the DLM model that also accounts for the differences between the two faces. Results show that the FASPECT model simulates accurately the reflectance and transmittance of the two faces for species presenting distinct reflectance and transmittance properties between the faces. FASPECT outperforms PROSPECT-5 and PROSPECT-D, while providing generally more realistic simulations as compared to DLM. The capacity of the FASPECT model to retrieve leaf biochemical composition from reflectance and transmittance measurements was also evaluated. Marginal improvement is observed for the estimation of chlorophyll, carotenoids, and water content. Conversely, significant improvement is observed for dry matter content estimation. Conclusions are finally drawn on the interest and limits of the FASPECT model. © 2020 Elsevier Inc.
英文关键词	Chlorophyll; Dry matter content; Leaf radiative transfer model; Reflectance; Transmittance
语种	英语
scopus关键词	Chlorophyll; Lagrange multipliers; Pigments; Reflection; Biochemical composition; Dry matter content; Leaf optical property; Non-homogeneous distribution; Realistic simulation; Scattering materials; Specific absorption coefficients; Transmittance measurements; Optical properties
来源期刊	Remote Sensing of Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/179012
作者单位	Research Center of Forest Management Engineering of State Forestry and Grassland Administration, Beijing Forestry University, Beijing, 100083, China; EMMAH UMR 1114, INRA, UAPV, Avignon, 84914, France; HIPHEN SAS, 22b rue Charrue, Avignon, 84000, France
推荐引用方式 GB/T 7714	Jiang J.,Comar A.,Weiss M.,et al. FASPECT: A model of leaf optical properties accounting for the differences between upper and lower faces[J],2021,253.
APA	Jiang J.,Comar A.,Weiss M.,&Baret F..(2021).FASPECT: A model of leaf optical properties accounting for the differences between upper and lower faces.Remote Sensing of Environment,253.
MLA	Jiang J.,et al."FASPECT: A model of leaf optical properties accounting for the differences between upper and lower faces".Remote Sensing of Environment 253(2021).