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Table 1 Description of the independent variables used to predict fire occurrence. LFMC = Live Fuel Moisture Content and IP = Ignition Probability.

From: Modelling Fire Ignition Probability from Satellite Estimates of Live Fuel Moisture Content

Variable

Description

Rationale

LFMCt−1

LFMC corresponding to the 8-day period prior to the period including the fire date.

The lower the LFMC is one or two weeks before the fire detection, the higher IP is expected.

LFMCt−2

LFMC corresponding to the 8-day period prior to LFMCt −1.

Difference

Moisture variation between two previous periods to the fire date.

The more the moisture decreases before the fire detection, the higher IP is expected.

Slope

Moisture gradient between the maximum LFMC value and the period before the fire date.

The larger the moisture decrease is with respect to the maximum LFMC spring record for the same temporal and spatial placement, the higher IP is expected.

Anomaly

Departure of LFMC values before the fire date from the average value of that period during the time series.

The lower LFMC is recorded before the fire detection comparing to the mean recorded for the rest of the years, the higher IP is expected.