A satellite-based modified plant senescence reflectance index for green-water drought monitoring

Daniela Avetisyan

doi:10.1117/12.2599676

12 September 2021 A satellite-based modified plant senescence reflectance index for green-water drought monitoring

Daniela Avetisyan

Proceedings Volume 11863, Earth Resources and Environmental Remote Sensing/GIS Applications XII; 1186318 (2021) https://doi.org/10.1117/12.2599676
Event: SPIE Remote Sensing, 2021, Online Only

Conference Poster

Abstract

The present research introduces a satellite-based plant senescence reflectance index (PSRI2) involving in its calculation two red edge bands (0.705 μm and 0.783 μm) and the green peak band (0.560 μm) of Sentinel-2 sensors. The index takes the advantages of the effectiveness of the red edge and green peak bands in monitoring alterations of cellular structures and anthocyanins content induced by drought stress. Environmental stresses are associated with accelerated cellular leaf senescence and browning of plant tissues. As browning progresses, the spectral reflectance in the whole range of the spectrum decreases. The decrease in reflectance is most pronounced in the green peak and in the range between 0.750 and 0.800 μm, and is much smaller in the red and the blue regions, which are employed in the calculation of the original PSRI. Ranging PSRI2 values, representative for various land cover classes and ecosystems, developing under various environmental and climatic conditions were calculated. The studied land cover classes include broad-leaved, coniferous and mixed forest, transitional woodlands/shrubs, and natural grassland and pastures. Satellite images, acquired in different growing seasons, distinguished with different environmental conditions were used. A comparative analysis between the newly presented index and widely recognized indices for assessment of water content and moisture stress was made. The obtained results could be used in various studies related to monitoring of drought impact and climate change on ecosystems, assessment of ecosystem degradation processes, natural resource management, sustainability and planning.

Citation Download Citation

Daniela Avetisyan "A satellite-based modified plant senescence reflectance index for green-water drought monitoring", Proc. SPIE 11863, Earth Resources and Environmental Remote Sensing/GIS Applications XII, 1186318 (12 September 2021); https://doi.org/10.1117/12.2599676

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