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The use of back trajectory cluster analysis with PM2.5 composition at the eastern black sea of Turkey

Balcılar, İlker
Zararsız, Abdullah
Doğan, Güray
Tuncel, Süleyman Gürdal
In this study, the influence of synoptic-scale atmospheric transport patterns on observed levels of trace elements at Eastern Black Sea region of Turkey was examined. Daily PM2.5 samples were collected at station (40°32’34”N, 39°16’57”E) on the Eastern Black Sea region of Turkey and collected samples were analyzed with ICP-MS for trace element composition. Five-day long back trajectories for March 2011 to December 2013 were calculated for 3 different arrival heights, 100m, 500m and 1500m, and combination of these 3 arrival heights. Back trajectories of air masses arriving in Eastern Black Sea of Turkey were classified into distinct transport patterns by cluster analysis. Cluster Analysis grouped back trajectories into 10 clusters depending on their direction and speed. Measured concentrations of trace elements were assigned to clusters to examine their cluster to cluster variations. Kruskal Wallis test was used to test for significant differences in mean elemental concentration across clusters. Significant cluster to cluster differences were observed in levels of crustal, anthropogenic and mixed origin source elements