Figure 1

Locations of peat fires and PM sampling site in Eastern North Carolina (A) and daily mean concentrations of PM _2.5 and PM ₁₀ collected at Virginia Beach, VA and Hyde County, NC (B). Peat-bog fires at the Pocosin Lakes National Wildlife Refuge in Eastern North Carolina started on 06/01/2008 and was 100% contained on 09/24/2008. Insert: wind rose diagram for the periods of ENCF-1 PM sampling (06/26/2008-07/11/2008) and ENCF-4 PM sampling (08/08/2008-08/19/2008) recorded at Plymouth, Elizabeth City and Virginia Beach, respectively. The wind rose diagram and PM monitoring data were obtained from the State Climate Office of North Carolina (http://www.nc-climate.ncsu.edu) and the U.S. EPA Air Data (http://www.epa.gov/airdata), respectively.