An extended PROSPECT:Advance in the leaf optical properties model separating total chlorophylls into chlorophyll a and b

Zhang, Yao and Huang, Jingfeng and Wang, Fumin and Blackburn, George Alan and Zhang, Hankui and Wang, Xiuzhen and Wei, Chuanwen and Zhang, Kangyu and Wei, Chen (2017) An extended PROSPECT:Advance in the leaf optical properties model separating total chlorophylls into chlorophyll a and b. Scientific Reports, 7. ISSN 2045-2322

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Abstract

The PROSPECT leaf optical model has, to date, well-separated the effects of total chlorophyll and carotenoids on leaf reflectance and transmittance in the 400–800 nm. Considering variations in chlorophyll a:b ratio with leaf age and physiological stress, a further separation of total plant-based chlorophylls into chlorophyll a and chlorophyll b is necessary for advanced monitoring of plant growth. In this study, we present an extended version of PROSPECT model (hereafter referred to as PROSPECT-MP) that can combine the effects of chlorophyll a, chlorophyll b and carotenoids on leaf directional hemispherical reflectance and transmittance (DHR and DHT) in the 400–800 nm. The LOPEX93 dataset was used to evaluate the capabilities of PROSPECT-MP for spectra modelling and pigment retrieval. The results show that PROSPECT-MP can both simultaneously retrieve leaf chlorophyll a and b, and also performs better than PROSPECT-5 in retrieving carotenoids concentrations. As for the simulation of DHR and DHT, the performances of PROSPECT-MP are similar to that of PROSPECT-5. This study demonstrates the potential of PROSPECT-MP for improving capabilities of remote sensing of leaf photosynthetic pigments (chlorophyll a, chlorophyll b and carotenoids) and for providing a framework for future refinements in the modelling of leaf optical properties.

Item Type:
Journal Article
Journal or Publication Title:
Scientific Reports
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1000
Subjects:
ID Code:
88768
Deposited By:
Deposited On:
18 Nov 2017 13:48
Refereed?:
Yes
Published?:
Published
Last Modified:
09 Sep 2020 04:29