Home > Research > Publications & Outputs > An extended PROSPECT

Links

Text available via DOI:

View graph of relations

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

Research output: Contribution to journalJournal articlepeer-review

Published
  • Yao Zhang
  • Jingfeng Huang
  • Fumin Wang
  • George Alan Blackburn
  • Hankui Zhang
  • Xiuzhen Wang
  • Chuanwen Wei
  • Kangyu Zhang
  • Chen Wei
Close
Article number6429
<mark>Journal publication date</mark>25/07/2017
<mark>Journal</mark>Scientific Reports
Volume7
Number of pages10
Publication StatusPublished
<mark>Original language</mark>English

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.