Relationship between drought indicators based on remote sensing and forest fires incidence in Spain

摘要

In this communication we combine different products obtained from the NOAA-AVHRR sensor in order to evaluate the relationships between the anomalies in the NDVI in peninsular Spain and the Balearic islands during the four summer months of the year 2000 and the active "hot spots" detected in the same time period and available in the World Fire Web. The analysis is carried out using the relative proportions of pixels affected and not affected by fire in the several anomaly classes defined for the whole study area and additionally for the different Autonomous Communities. Our starting hypothesis is that forest fires are registered in higher proportions in the negative anomaly classes, that is, with NDVI values lower than the mean for a reference period. The results obtained present a great agreement with this hypothesis, in such a way that the relative proportion of pixels affected by fire is greater in the negative anomaly classes.