Measurements in a highly polluted Asian mega city: observations of aerosol number size distribution, modal parameters and nucleation events P. Mönkkönen, I. K. Koponen, K. E. J. Lehtinen, K. Hämeri , R. Uma, and M. Kulmala University of Helsinki, Department of Physical Sciences, Finland Finnish Institute of Occupational Health, Helsinki, Finland The Energy and Resources Institute (TERI), New De...