Statistical Characteristics of Angstrom Fire Index for Tbilisi

Abstract

The results of a statistical analysis of the daily values ​​of the Angstrom Fire Index (I) for Tbilisi in the period from 2014 to 2018 are presented. AFI = (R/20) + (27-T)/10, where R is the minimum relative humidity, T is the maximum air temperature. The gradations of the values ​​of I are as follows: I. AFI> 4.0 - Fire occurrence unlikely, II.AFI = 4.0 ÷ 2.5 - Fire conditions unfavorable, III. AFI = 2.5 ÷ 2.0 - Fire conditions favorable, IY. AFI = <2.0 - Fire occurrence very likely. In particular, it was found that a high fire hazard in Tbilisi is observed on average within 75 days a year, and increased - within 39 days a year. The largest number of days with high fire hazard was observed in 2018 (92 days), the smallest - in 2016 (57 days). Further, it is planned to expand work on this issue (using other more complex fire hazard indices, studying their trends in connection with climate change, determining these indices for other points in Georgia, etc.).