The Use of Trajectory Cluster Analysis to Evaluate the Long-Range Transport of Black Carbon Aerosol in the South-Eastern Baltic Region

Figure 4

Every spring, at the end of the winter season, agricultural burning and wildfires produce large amounts of smoke in Kaliningrad (Russia), Belarus,and Ukraine. The fires usually begin in March. South westerly or easterly winds carrying the resulting smoke to Preila: (a) active fires (each red dot represents a single 1 km MODIS active fire pixel) detected during March, 2013 during high BC concentration event by the MODIS Rapid Response System, March 27 2013 (right), (b) air mass backward trajectories arriving at Preila at 50 m (red), 500 m (blue), and 1000 m (green) (left), and (c) smoke surface concentration (μg m⁻³).