Relationship Between Standardized Precipitation Index (SPI) and the Fire Occurrence Reports (FOR) in Itatiaia National Park

ABSTRACT

We evaluated fire foci data via environmental satellites, from Frontal Systems (FS) and South Atlantic Convergence Zone (SACZ) together with Standardized Precipitation Index (SPI) and Fire Occurrence Reports (FOR) in Itatiaia National Park (INP). SPI were computed with rainfall data from three stations in INP. SF and SACZ data were obtained via Climanálise. We applied independent multiple regression to FOR, SPI, SF and SACZ. Largest FOR occurred category in C class (81%), highest percentages during winter (57.2%) and spring (35.1%). The critical months to fire foci were July (17%), September (23.2%) and August (31.9%). Regardless of the season, FS (R² = 0.75) were highlighted to SACZ (R² = 0.43). SF conditioned 80% of variations between FOR and annual SPI index, while only 40% were due to SACZ.

Keywords:
systems meteorological; forest fires; drought index