Measurement and simulation of the 16/17 April 2010 Eyjafjallajökull volcanic ash layer dispersion in the northern Alpine region - Emeis, S.; Forkel, R.; Junkermann, W.; Schäfer, K.; Flentje, H.; Gilge, S.; Fricke, W.; Wiegner, M.; Freudenthaler, V.; Groß, S.; Ries, L.; Meinhardt, F.; et al. (European Geosciences Union, 2011)