Aerosol properties of the Eyjafjallajokull ash derived from sun photometer and satellite observations over the Iberian Peninsula

C. Toledano, Y. Bennouna, V. Cachorro, J.P. Ortiz de Galisteo, Andreas Stohl, Kerstin Stebel, Nina Iren Kristiansen, F. J. Olmo, H. Lyamani, M. A. Obregón, V. Estellés, F. Wagner, J. M. Baldasano, Y. González-Castanedo, L. Clarisse, A. M. de Frutos