High-Resolution Grassland GPP Estimation with Landsat and Sentinel-2 (Mustafa Serkan Isik)

The Open-Earth Monitor Global Workshop 2026 "Next-Generation EO & GeoAI Built on Openness and Distributed Data" 7-9 October 2026, Barcelona, Spain https://earthmonitor.org/global-workshop-2026/ We present an updated generation of the Global Pasture Watch (GPW) gross primary productivity (GPP) products for grassland ecosystems at 30 m spatial resolution. This new release builds on the original Landsat-based light use efficiency framework by integrating improved MODIS land surface temperature (MOD21) and updated photosynthetically active radiation inputs, while also introducing an experimental Sentinel-2-based GPP product. The combined use of Landsat and Sentinel-2 observations strengthens the capacity to monitor grassland productivity dynamics with improved spatial detail and temporal consistency across local to global scales. Beyond long-term ecosystem assessment and grassland monitoring, the updated GPW GPP products are also intended to support near-real-time (NRT) grassland biomass estimation within the Time2Graze project.