INTRODUCTION
Fire, sometimes called biomass burning, is a key factor affecting many aspects of the Earth system, including climate change, ecosystems, land surface processes, the carbon cycle, atmospheric chemistry and human society [1-3].Understanding fire dynamics can provide insights into the interactions between fire and these components.Satellite data can provide high spatial-temporal resolution of fire changes for the most recent decades, while some historical information—such as the area burned in a certain region—can be traced back to the beginning of the twentieth century [1].Fire changes over longer time scales (historical to ancient) can be derived from proxy records in the lithosphere, biosphere, cryosphere, hydrosphere and anthroposphere [1,3].A combination of several evidence sources can yield a good estimate of the true fire variability [1-4].