Research Article

Identification and Characterization of Black Carbon Aerosol Sources in the East Baltic Region

Figure 3

(a) The spectral variation of instantaneous measurements of AOD for April 2011 showing the gradual buildup and decline of smoke concentrations in this period (April 25–29, blue cycle); (b) values of the Angström exponent of the absorption coefficient (April 29, 2011) showing dynamic variations as a result of both increasing (decreasing) AOD and BC concentration and greater domination of fine mode versus coarse mode optical depth.
380614.fig.003a
(a)
380614.fig.003b
(b)