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Ember Flight Distance Is Based on Convection Column Lift, Not On Tree Height or Species
factors that affect how a wildfire spreads

both convection columns and wind can lift embers      web

doc-titleThe Changing Fire Environment
authorUtah State University
quoteThere is a fourth method by which fire spreads that is of great concern to firefighters. This is the mass transport of firebrands which can occur as a result of convection, wind, or gravity. We call this spotting. Small embers of burning material can be lifted in a convection column and be carried some distance ahead of a fire. Wind, in addition to strong convective currents, can carry embers or firebrands considerable distances downwind from the fire. Wind without convective lifting will result in shorter range spotting of firebrands.
sourceUtah State University's "The Changing Fire Environment"

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