[MSD47-P11] Development of new satellite to monitor SIF and PRI of terrestrial vegetation
Keywords:Vegetation remote sensing
In recent years, advent of the Earth-observation satellite with high wavelength-resolution sensors enable us to observe SIF (Solar-Induced chlorophyll Fluorescence) emitted from terrestrial vegetation. Since the chlorophyll fluorescence is emitted in photochemical reaction, which is a part of photosynthetic process, SIF would be good indicator of photosynthetic activity. In the photochemical reaction, xanthophyll cycle is also play important roll to release extra energy and it is able to monitor its condition by using PRI (Photochemical Reflectance Index). In the recent study in single-leaf scale, it has been shown that simultaneously measured SIF and PRI help us to estimate accurate photosynthetic rate based on ecophysiological model (Hikosaka and Noda 2019). Similarly, simultaneous measurement of SIF and PRI with the Earth-observation satellite would be helpful to estimate GPP and understand the in regional to global scale. However, there are no satellite to measure SIF and PRI simultaneously to date. FLEX, which will be launched in 2023 is the only satellite mission to measure them.
In this talk, we will propose development of new satellite or only optical sensor to observe SIF and PRI. If the sensor onboard with other optical sensor like GCOM-C SGLI, we could obtain SIF, PRI and other vegetation indices such as NDVI simultaneously. These satellite data would contribute accurate estimation of GPP and effective policy making against global warming.