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Spatio-Temporal Convergence of Maximum Daily Light-Use Efficiency Based on Radiation Absorption by Canopy Chlorophyll

Zhang, Yao ; Xiao, Xiangming ; Wolf, Sebastian ; Wu, Jin ; Wu, Xiaocui ; Gioli, Beniamino ; Wohlfahrt, Georg ; Cescatti, Alessandro ; van der Tol, Christiaan and Zhou, Sha , et al. (2018) In Geophysical Research Letters 45(8). p.3508-3519
Abstract

Light-use efficiency (LUE), which quantifies the plants' efficiency in utilizing solar radiation for photosynthetic carbon fixation, is an important factor for gross primary production estimation. Here we use satellite-based solar-induced chlorophyll fluorescence as a proxy for photosynthetically active radiation absorbed by chlorophyll (APARchl) and derive an estimation of the fraction of APARchl (fPARchl) from four remotely sensed vegetation indicators. By comparing maximum LUE estimated at different scales from 127 eddy flux sites, we found that the maximum daily LUE based on PAR absorption by canopy chlorophyll ( εmaxchl), unlike other expressions of LUE, tends to converge across biome types. The... (More)

Light-use efficiency (LUE), which quantifies the plants' efficiency in utilizing solar radiation for photosynthetic carbon fixation, is an important factor for gross primary production estimation. Here we use satellite-based solar-induced chlorophyll fluorescence as a proxy for photosynthetically active radiation absorbed by chlorophyll (APARchl) and derive an estimation of the fraction of APARchl (fPARchl) from four remotely sensed vegetation indicators. By comparing maximum LUE estimated at different scales from 127 eddy flux sites, we found that the maximum daily LUE based on PAR absorption by canopy chlorophyll ( εmaxchl), unlike other expressions of LUE, tends to converge across biome types. The photosynthetic seasonality in tropical forests can also be tracked by the change of fPARchl, suggesting the corresponding εmaxchl to have less seasonal variation. This spatio-temporal convergence of LUE derived from fPARchl can be used to build simple but robust gross primary production models and to better constrain process-based models.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Fraction of absorbed photosynthetic active radiation, Gross primary productivity, Optical vegetation activity indicator, Photosynthetic capacity, Production efficiency models, Solar-induced chlorophyll fluorescence
in
Geophysical Research Letters
volume
45
issue
8
pages
3508 - 3519
publisher
American Geophysical Union (AGU)
external identifiers
  • scopus:85045841812
ISSN
0094-8276
DOI
10.1029/2017GL076354
language
English
LU publication?
yes
id
25a77ddf-94e8-4189-9717-12fe8a0ccb39
date added to LUP
2018-05-07 10:01:25
date last changed
2022-04-09 23:39:04
@article{25a77ddf-94e8-4189-9717-12fe8a0ccb39,
  abstract     = {{<p>Light-use efficiency (LUE), which quantifies the plants' efficiency in utilizing solar radiation for photosynthetic carbon fixation, is an important factor for gross primary production estimation. Here we use satellite-based solar-induced chlorophyll fluorescence as a proxy for photosynthetically active radiation absorbed by chlorophyll (APAR<sub>chl</sub>) and derive an estimation of the fraction of APAR<sub>chl</sub> (fPAR<sub>chl</sub>) from four remotely sensed vegetation indicators. By comparing maximum LUE estimated at different scales from 127 eddy flux sites, we found that the maximum daily LUE based on PAR absorption by canopy chlorophyll ( εmaxchl), unlike other expressions of LUE, tends to converge across biome types. The photosynthetic seasonality in tropical forests can also be tracked by the change of fPAR<sub>chl</sub>, suggesting the corresponding εmaxchl to have less seasonal variation. This spatio-temporal convergence of LUE derived from fPAR<sub>chl</sub> can be used to build simple but robust gross primary production models and to better constrain process-based models.</p>}},
  author       = {{Zhang, Yao and Xiao, Xiangming and Wolf, Sebastian and Wu, Jin and Wu, Xiaocui and Gioli, Beniamino and Wohlfahrt, Georg and Cescatti, Alessandro and van der Tol, Christiaan and Zhou, Sha and Gough, Christopher M. and Gentine, Pierre and Zhang, Yongguang and Steinbrecher, Rainer and Ardö, Jonas}},
  issn         = {{0094-8276}},
  keywords     = {{Fraction of absorbed photosynthetic active radiation; Gross primary productivity; Optical vegetation activity indicator; Photosynthetic capacity; Production efficiency models; Solar-induced chlorophyll fluorescence}},
  language     = {{eng}},
  month        = {{04}},
  number       = {{8}},
  pages        = {{3508--3519}},
  publisher    = {{American Geophysical Union (AGU)}},
  series       = {{Geophysical Research Letters}},
  title        = {{Spatio-Temporal Convergence of Maximum Daily Light-Use Efficiency Based on Radiation Absorption by Canopy Chlorophyll}},
  url          = {{http://dx.doi.org/10.1029/2017GL076354}},
  doi          = {{10.1029/2017GL076354}},
  volume       = {{45}},
  year         = {{2018}},
}