Wildfires can lead to severe environmental consequences by releasing large amounts of particulate matter (PM) and precursors of ozone (Sandberg et al., 1999; Riebau and Fox, 2001). The Southeast has the most burned area among various U.S. regions (Stanturf et al., 2002) and has regionally some of the highest levels of PM and ozone in the nation. Fires have been found to be an important contributor (Zheng et al. 2002). On the other hand, smoke particles from wildfires are one of the atmospheric anthropogenic aerosol sources. They can affect global and regional radiation and climate (e.g., Penner et al. 1992, Liu 2005a).