New particle formation and ultrafine charged aerosol climatology at a high altitude site in the Alps (Jungfraujoch, 3580 m a.s.l., Switzerland)
J. Boulon, K. Sellegri, H. Venzac, D. Picard, E. Weingartner, G. Wehrle, M. Coen, R. Bütikofer, E. Flückiger, U. Baltensperger, P. Laj