A one-dimensional model describing aerosol formation and evolution in the stratosphere: II. Sensitivity studies and comparison with observations

摘要: Abstract We have performed sensitivity tests on a one-dimensional physical-chemical model of the unperturbed stratospheric aerosols and compared calculations with observations. The comparisons observations suggest that coagulation controls particle number mixing ratio, although condensation nuclei at tropopause diffusion coefficient high altitudes are also important. sulfate mass large (r > 0.15 µm) ratios controlled by growth, sedimentation, evaporation washout below tropopause. sulfur gas source strength aerosol residence time much more important than supply in establishing concentrations. size is mainly time. OCS (not SO2diffusion) dominates production H2SO4 particles during times, direct injection o...