Fig. 3From: Classification of forest fuels in selected fire-prone ecosystems of Alberta, Canada—implications for crown fire behaviour prediction and fuel managementProbability of crown fire occurrence and active crown fire rate of spread (ROS) by fuel class cluster (FCC) shown for combinations of 10-m open wind speed and fine fuel moisture content. Horizontal lines denote the minimum ROS for sustained propagation of a crown fire. Points denote the intersection of active crown fire ROS with the minimum ROS for sustained propagation of a crown fireBack to article page