Aerosol distributions measured with a Royco 220 particle counter over Northern Europe in Spring 1976, Fall 1976, and Summer 1977 are presented. The vertical aerosol structures were measured with an integrating nephelometer and are presented to give context to discrete aerosol size distribution and concentration measurements at altitudes near 500 m, 3000 m, and 6000 m. Analysis of aerosol data indicates that the aerosol distribution shapes at altitudes of 1.8 km and 6.0 km are very similar to distributions measured earlier over the midwestern U.S. using an impactor. Sampling analysis, and comparison to nephelometer measurements, indicate the aerosol measurements probably always represent the dry aerosol particle distribution vice the actual distribution (in balance with existing relative humidity) sensed by the nephelometer. These data provide an excellent picture of the relative changes that were found to occur in the vertical, and in space and time, with changing synoptic conditions.