The International Crown Fire Modelling Experiment (ICFME) represents a major field activity of the International Boreal Forest Research Association's Fire Working Group and the International Geosphere-Biosphere Programme's project on global atmospheric chemistry associated with biomass burning. ICFME is one of three recent burning experiments conducted to investigate the behavior, ecological impacts and atmospheric chemical effects of high intensity crown fires in northern circumpolar boreal forests. The others took place in central Siberia in July 1993, and interior Alaska in July 1999. ICFME's principal focus was the testing and calibration of a new, physically based model for predicting the rate of spread and intensity of crown fires. The model was developed by Dr. Frank Albini of Montana State University, a theoretical wildland fire modeller, and supported by both the CFS and USFS.