Table 3. Area of different time series models for unburned forest and areas burned in three episodic fire years (1981, 1989, and 1995).

Model type	Unburned, km2 (%)	Burned, km2 (%)
Stationary with trend	3,136 (22.4%)	576 (4.1%)
Stationary with no trend	5,440 (38.8%)	6,080 (43.4%)
Random walk with drift	3,584 (25.6%)	4,928 (35.2%)
Random walk with no drift	1,856 (13.2%)	2,432 (17.4%)