Spatio-temporal Convergence of Maximum Daily Light-Use Efficiency Based on Radiation Absorption by Canopy Chlorophyll
- Univ. of Oklahoma, Norman, OK (United States). Dept. of Microbiology and Plant Biology and Center for Spatial Analysis; Columbia Univ., New York, NY (United States). Dept. of Earth and Environmental Engineering
- Univ. of Oklahoma, Norman, OK (United States). Dept. of Microbiology and Plant Biology and Center for Spatial Analysis; Fudan Univ., Shanghai (China). Ministry of Education Key Lab. of Biodiversity Science and Ecological Engineering and Inst. of Biodiversity Science
- ETH Zurich (Switzerland). Dept. of Environmental Systems Science
- Brookhaven National Lab. (BNL), Upton, NY (United States). Biological, Environmental & Climate Sciences Dept.
- Univ. of Oklahoma, Norman, OK (United States). Dept. of Microbiology and Plant Biology and Center for Spatial Analysis
- Inst. of Biometeorology of the National Research Council (IBIMET-CNR), Firenze (Italy)
- Univ. Innsbruck (Austria). Inst. of Ecology
- European Commission (EC) Joint Research Centre (JRC) and Directorate for Sustainable Resources, Ispra (Italy)
- Univ. of Twente (Netherlands). Faculty of Geo-Information Science and Earth Observation (ITC) and Dept. of Water Resources
- Tsinghua Univ., Beijing (China). State Key Lab. of Hydroscience and Engineering and Dept. of Hydraulic Engineering
- Virginia Commonwealth Univ., Richmond, VA (United States). Dept. of Biology
- Columbia Univ., New York, NY (United States). Dept. of Earth and Environmental Engineering
- Nanjing Univ. (China). Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application and International Inst. for Earth System Sciences
- Karlsruhe Inst. of Technology (KIT) (Germany). Dept. of Atmospheric Environmental Research and Inst. for Meteorology and Climate Research
- Lund Univ. (Sweden). Physical Geography and Ecosystem Science
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 (GPP) estimation. Here we use satellite-based solar-induced chlorophyll fluorescence (SIF) 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 (ε$$chl\atop{max}$$), 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 (ε$$chl\atop{max}$$}$$) to have less seasonal variation. Finally, this spatio-temporal convergence of LUE derived from fPARchl can be used to build simple but robust GPP models and to better constrain process-based models.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23); FLUXNET; Natural Environment Research Council (NERC) Earth Observation Data Centre (NEODC); European Space Agency (ESA); Airbus Defence and Space; National Aeronautic and Space Administration (NASA); GFZ German Research Centre for Geosciences; USDA National Inst. for Food and Agriculture (NIFA); National Science Foundation (NSF); National Natural Science Foundation of China (NNSFC)
- Grant/Contract Number:
- SC0012704
- OSTI ID:
- 1431443
- Report Number(s):
- BNL--203445-2018-JAAM
- Journal Information:
- Geophysical Research Letters, Journal Name: Geophysical Research Letters Journal Issue: 8 Vol. 45; ISSN 0094-8276
- Publisher:
- American Geophysical UnionCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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