Canopy fuel [Aerial fuel, Available canopy fuel]
n. The foliage and fine branchwood of trees.
It is generally assumed that all canopy fuel consumption takes place during the short duration of the flaming front of a crown fire. Only fine fuel particles are consumed in the flaming crown fire front -- the foliage plus some fraction of the live and dead branchwood (Brown and Bradshaw 1994; Brown and Reinhardt 1991). Scott and Reinhardt (2005) estimated available canopy fuel as the foliage plus 0-3 mm live branchwood plus 0-6 mm dead branchwood.