Effects of FFC upon cloud droplet activation

1
Effects of FFC upon cloud droplet activation

• MODEL SETUP
• Simple adiabatic parcel model, T285 K, p950
  hPa
• Lognormal aerosol size distribution N3000 cm-3,
  rg50 nm, ?2.0
• FFC properties M0.28 kg mol-1, Amol40 Å2
• Variable mass fraction of FFC distributed either
  by surface area or by mass
• Use effect upon mass accommodation coefficient
  determined using Thorntons measurements for N2O5
• Move parcel to 100 m above cloud base and
  determine number of drops with rgt1 micron