A modelling study on the activation of small Aitken-mode aerosol particles during CIME 97

摘要: During February 1997, one of the 2 observational periods CIME ( c loud  i ce  m ountain  e xperiment), a joint field experiment funded by European Commission, took place on summit Puy de Dōme in centre France. this droplet spectra were measured with an FSSP and aerosol particles drops interstitial particle phase counterflow virtual impactor round jet inside windtunnel. Very low drop concentrations observed as small 25 nm diameter found to activate. Two datasets obtained 15 17 used study activation Aitken-mode spectral form spectrum scavenging fraction. Numerous sensitivity studies performed investigating role number density chemical composition particles. The mixing orographic cloud was studied using new technique. It considers fact that air arriving Dome is mixture different origins. Thus, it weighs results model (DESCAM or EXMIX) calculated along individual trajectories. weighing function derived from tracer trajectory 3-dimensional mesoscale model. able reproduce nm. caused concentrations. In general, we can conclude variability tests dynamical factors allows shape results. As too many free parameters exit at moment cannot quantify contribution each factor fraction, however, seems dynamics dominates. DOI: 10.1034/j.1600-0889.2000.d01-5.x