Photosynthetic activity of various vegetation types in southern Western Siberia and its relationship with environmental parameters based on reanalysis and satellite data
A.V. Skorokhodov, T.B. Zhuravleva
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
Keywords: solar-induced fluorescence, temperature-moisture parameters, vegetation index, photosynthetically active radiation, correlation analysis, TROPOMI, ERA5-Land, MODIS, CERES
Abstract
Solar-induced fluorescence is an indicator of plant photosynthetic activity that shows promise for monitoring ecosystem productivity on a global scale. The paper presents estimates of the photosynthetic activity for the main phytocenoses of southern Western Siberia (grasslands, deciduous and light coniferous forests, croplands and wetlands) based on TROPOMI satellite data for the period 2018-2024. Using ERA5-Land reanalysis data and products obtained from MODIS and CERES sensor measurements, we investigated the correlations between solar-induced fluorescence and key environmental temperature and moisture parameters, vegetation indices, and photosynthetically active radiation, as well as directly between these features themselves (spatial resolution - 0.05°, temporal resolution - 1 month). The presented results describe the specifics of these relationships both for the main phytocenoses of the entire target region and their latitudinal variability for grasslands and deciduous forests.
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