30 April 2016 Modelling satellite-level solar-induced chlorophyll fluorescence and its comparison with OCO-2 observations
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Abstract
Solar Induced chlorophyll Fluorescence (SIF) is a direct measure of photosynthesis rate as it is emitted by the photosynthetic system. This paper reports a method to model SIF over India by assimilating spatial inputs (LAI, Chlorophyll content etc.) into FluorMOD leaf and canopy model. Modelled SIF was then compared to Orbiting Carbon Observatory (OCO-2) SIF observations from September 2014 to August 2015. Modelled SIF at 757 nm averaged over the country varied between 0.18 to 0.33 W m-2 sr-1 μm-1 whereas SIF at 771 nm varied between 0.10 to 0.19 W m-2 sr-1 μm-1. OCO-2 observed SIF at 757 nm averaged over the country ranged from 0.18 to 0.42 Wm-2sr-1μm-1. Fairly good agreement (r=0.77, p<0.01 at 757nm; r=0.71, p<0.05 at 771 nm) was observed between modelled and observed SIF except for summer months of April and May. This paper presents a new approach to upscale a leaf and canopy level model to estimate SIF over entire country.
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Rohit Pradhan, Rohit Pradhan, Ankit Gohel, Ankit Gohel, } "Modelling satellite-level solar-induced chlorophyll fluorescence and its comparison with OCO-2 observations", Proc. SPIE 9880, Multispectral, Hyperspectral, and Ultraspectral Remote Sensing Technology, Techniques and Applications VI, 98800T (30 April 2016); doi: 10.1117/12.2222300; https://doi.org/10.1117/12.2222300
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