Parameterization of the CCN-Humidity spectrum in dependency on nucleation conditions and aerosol size distribution

Atmospheric CCN-humidity spectra (describing the CCN-number concentration a s function of supersaturation) are derived as the integral over given parti cle size distributions. In that concept the finite boundary, representing t he limiting activated particle size, results from the critical values of th e Kohler-curve. As utilization of this general outcome different representa tive aerosol size distributions of the power law type as well as the log-no rmal type are chosen for case studies which are compared to empirical resul ts. The dependency on temperature of the limiting activated particle size i s shown to provide a non-negligible influence on the number of activated pa rticles.