Table 3: The backward trajectory arrival date and source countries of the Sahara dust events collected at the Jungfraujoch (JFJ) Research Station, PM10 values and mean grain size.

Sample name Backward trajectory arrival date and origin (Figure 1) PM10 (μg/m3) Mean (μm) I 28.05.2008 20 h Libya, Tunisia 26.2 — J 01.06.2008 17 h Morocco, Algeria, Tunisia 12 4.0 A 25.06.2008 23 h Libya, Tunisia, Algeria 45.1 3.9 B 07.08.2008 3 h Morocco 9.8 4.0 C 09.09.2008 18 h Algeria 27.9 3.9 D 10.09.2008 18 h Libya, Tunisia, Algeria 58.7 3.4 K 11.09.2008 15 h Algeria 46.9 — L 13.10.2008 21 h Algeria, Mali 38.7 — G 13.05.2009 20 h Libya, Algeria 19 3.8 H 24.05.2009 23 h Morocco, Algeria 22.2 4.3 E 12.10.2009 23 h West via Greenland 1.1 — F 14.10.2009 12 h West via Greenland 1.3 —