Sulfur budget and H2SO4 evaporation from particles in the upper region of the stratospheric aerosol layer.

Abstract

The evaporation rate of H2SO4 in the upper aerosol region was first estimated from the vertical change of particle size distribution defined by the lidar measurements. The rate was found in the range 15-30 (H2SO4 molecules) cm-3 sec-1. This results indicate that the evaporation is not negligible for the sulfate budget of lower stratosphere, and that it should be necessary to make clear the aeronomic behavior of H2SO4 gas above the aerosol layer.