Remote sensing of instantaneous drought stress using sun-induced chlorophyll fluorescence and hyperspectral canopy refelctance
(2022) National Sumposium of applied biological sciences — Location: Antwerp (8.July.2022)
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- Authors
De Canniere, Simon 
- et. al.
- Abstract
- Drought is one of the major reasons for global crop yield loss. This research aims at detecting the drought onset with remote sensing data. To do so, the sun-induced chlorophyll fluorescence (SIF) signal is used. This signal originates from a photon that is re-emitted by a chlorophyll molecule, and it is therefore mechanistically coupled to the photosynthetic apparatus, making SIF sensitive to small-drought induced changes in photosynthetic activity. Since SIF only comprises only of 2% of the absorbed radiation, it can only be measured in solar telluric lines or atmospheric absorption lines, in which solar irradiation is absent. This research focusses on SIF in the O2A absorption band, which is the best-described band. The European Space Agency plans to launch the Fluorescence Explorer (FLEX) in 2025 to measure SIF at the global scale. In order to maximally benefit from the FLEX observations, it is necessary to precisely describe the link between SIF and increasing drought conditions.
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Citations
De Canniere, S., & et al. (2022). Remote sensing of instantaneous drought stress using sun-induced chlorophyll fluorescence and hyperspectral canopy refelctance. National Sumposium of applied biological sciences, Antwerp. https://hdl.handle.net/2078.5/240761