The aim of our study is to derive characteristic vertical profiles of CCN and IN for two different situations in the Arctic and investigate the influence on the cloud microphysics and the evolution of a mixed-phase Arctic boundary layer cloud. The two situations investigated represent two different source types of aerosols in the Arctic region. We compare a situation where the aerosol concentrations are either predominantly governed by local sources or dominated by long-range transport. In case of local sources the aerosol particles are emitted at the surface, while the transported aerosol particles are introduced above the boundary layer inversion. To compile the vertical profiles for different aerosol scenarios we use field measurements in combination with regional modeling using the regional model COSMO-ART (Vogel et al., 2009). The influence of the different vertical aerosol profiles on the cloud microphysics is investigated using the LES model MIMICA (Savre et al., 2014).
Vogel, B., Vogel, H., Bäumer, D., Bangert, M., Lundgren, K., Rinke, R., Stanelle, T. (2009), The comprehensive model system COSMO-ART - Radiative impact of aerosol on the state of the atmosphere on the regional scale, Atmos. Chem. Phys., 9, p. 8661-8680.
Savre, J., Ekman, A. M. L. and Svensson, G. (2014), Technical note: Introduction to MIMICA, a large-eddy simulation solver for cloudy planetary boundary layers, J. Adv. Model. Earth Syst., 6, p. 630–649.