FLUOPHOT - Remotely quantifying vegetation productivity: exploiting sun-induced fluorescence-photosynthesis relationships through field and modelling methods
Earth observation (EO) is one of the most powerful tools available to assess the functioning and productivity of the Earth’s vegetation in response to its (changing) environment. This functioning and productivity in the biosphere are mainly driven by photosynthesis, the critical reaction sustaining life on Earth by converting atmospheric carbon into biomass. Since the last decades, EO systems for land applications focused on deriving the type and/or status of green vegetation based on the strong and dominant reflectance signal. However, those products merely rely on static vegetation properties, such as the overall greenness, which do not inform on the actual plant performance. Interestingly, there is an additional light source besides reflected light, originating from the chloroplasts, the origin place of photosynthesis. Sun-induced chlorophyll fluorescence (SIF) is light emitted by Chl pigments in the red and far-red range (650-850 nm) and is one of the de-excitation mechanisms of vegetation to dissipate light energy absorbed by the plant.
FLUOPHOT (2016-2018) is funded by the European Union’s H2020 Marie Skłodowska-Curie actions nº .
Absorbed light by the leaf and emitted chlorophyll fluorescence under natural light conditions (left).Chlorophyll fluorescence quenching during light adaptation (Kautsky effect) (right).