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# Table 1 Selected models for prediction of monthly Fire Density Index from Dead Ratio values for Mexico, for the period 2003 to 2014. Veg: vegetation type; AG: Agriculture; All but AG: all vegetation types except Agriculture; Eq. n: equation number. FDI: monthly Fire Density Index; DR: monthly Dead Ratio; a and b are model coefficients; di: dummy variable for identifying month or group of months i, with value = 1 for the identified month or group of months i and value = 0 for the remaining months. Numbers in coefficients and in model description correspond to months or groups of months, with 12: December, 1: January, 2: February, 3: March, 4: April, 5: May, 6: June, 7: July, 8: August, 9: September, 10: October, 11: November. Consecutive month groups are indicated with an en dash (–) and non-consecutive month groups indicated with a low line ( _ ). For example, in Eq. 20, termed 12–3, 4_6, 5, there are three groups of months with distinct coefficients: months 12 to 3 together, months 4 and 6 together, and month 5 separately

Veg Eq. n Month groups Equation
All but AG 7 All months grouped FDI = aDRb
18 12−4_6, 5 FDI = (d12–4_6a12–4_6DR + d5a5DR)b
19 12−3, 4−6 FDI = (d12–3a12–3DR + d4–6a4–6DR)b
20 12−3, 4_6, 5 FDI = (d12–3a12–3DR + d4_6a4_6DR + d5a5DR)b
21 12−3, 4−5, 6 FDI = (d12–3a12–3DR + d4–5a4–5DR + d6a6DR)b
22 12−3_6, 4−5 FDI = (d12–3_6a12–3_6DR + d4–5a4–5DR)b
23 12−3_6, 4, 5 FDI = (d12–3_6a12–3_6DR + d4a4DR + d5a5DR)b
24 12−2, 3, 4_6, 5 FDI = (d12–2a12–2DR + d3a3DR + d4_6a4_6DR + d5a5DR)b
25 12−2, 3_6, 4, 5 FDI = (d12–2a12–2DR + d3_6a3_6DR + d4a4DR + d5a5DR)b
26 12−2_6, 3, 4−5 FDI = (d12–2_6a12–2_6DR + d3a3DR + d4–5a4–5DR)b
AG 27 9−4, 5−8 FDI = (d9–4a9–4DR + d5–8a5–8DR)b
28 9−3, 4−6, 7−8 FDI = (d9–3a9–3DR + d4–6a4–6DR + d7–8a7–8DR)b
29 9−3_7−8, 4, 5−6 FDI = (d9–3_7–8a9–3_7–8DR + d4a4DR + d5–6a5–6DR)b