The sampling regime has been changed several times. All changes are described by Fomba et al. (2014). The PM10 filter were stored in a freezer at Mindelo and transported frozen from Minelo to Germany to TROPOS. The sampling height was 32 m above ground (42 m above sea level).Organic and elemental carbon were analyzed by a two-step thermographic method (C-mat 5500, Ströhlein, Germany) with nondispersive infrared sensor (NDIR) detection as described in Neusüss et al. (2002, doi:10.1029/2001JD000514), Gnauk et al. (2008, doi:10.1016/j.atmosenv.2008.05.001) and Carpenter et al. (2010, doi:10.1007/s10874-011-9206-1). The detection limits for quartz fiber filter analysis were 30 ng/m3 for EC and 100 ng/m3 for OC.