Effect of climatic and topographic variables on NDVI variations in a sub-Mediterranean mountain pastoral system

We mapped the NDVI of our study area and randomly extracted 10,000 pixels falling on grasslands. We collected topographic parameters for each pixel (altitude, aspect, slope and land form) and climatic variables (average monthly temperatures and monthly precipitation), and calculated bioclimatic indices. The considered variables explained about the 40% of the total NDVI variability, most of which was related to climatic parameters, while topographic variables (especially aspect) mostly acted in intensifying the effects of climate variations.