Comparison of Spheroidal Carbonaceous Particle Data with Modelled Atmospheric Black Carbon Concentration and Deposition and Air Mass Sources in Northern Europe, 1850–2010

Figure 6

Frequency of direction and distance of trajectories for each of the study sites. Each segment size shows the frequency of air coming from the compass direction towards which it points. A light colouring indicates short distance (km) from the study site, whereas dark colours show a long travel distance. The yellow dots indicate the study lakes and the red dots the coal mine in Kiruna, Sweden, and the smelter in Nikel on the Kola Peninsula, Russia. The plotted data is based on the frequency of trajectories spending time near the surface within 7 days of arriving at the lakes in the interval 1983–2007.