Figures & data
FIG. 1 Plot of typical measured particle concentration (left;, labeled EEPS) and calculated mass density (right) versus particle mobility diameter. (Color figure available online.)
FIG. 2 Plots of particle optical extinction (labeled CAPS) and absorption (MAAP) (bottom panel) and carbon dioxide concentrations (top panel) measured in the air sample as the ARI Mobile Laboratory is driven in and out of the engine exhaust plume emanating from a fixed aircraft. (Color figure available online.)
FIG. 3 Correlation plot of data taken using the MAAP (absorption) and CAPS PMex (extinction) monitors. The data are derived from the integrated plumes from the aircraft engine and are presented in units of loss × time. (Color figure available online.)
FIG. 4 Correlation plot of plume-integrated particle extinction versus carbon dioxide. Also shown is a linear least squares fit to the data. The soot emission index is calculated using the slope of the fitted line, the measured single scattering albedo and a mass specific absorption coefficient. (Color figure available online.)
FIG. 5 Plots of carbon dioxide concentration (top), particle optical extinction (CAPS PMex; middle), and particle absorption (MAAP; bottom) measured in the air samples taken at a location alongside an operating runway. The plumes labeled Events 1 and 2 derive from engine emissions from airplanes in the process of accelerating for takeoff. (Color figure available online.)
