Gravito-photophoresis and aerosol stratification in the atmosphere

摘要: The formation of aerosol layers in the earth's stratosphere and mesosphere under influence gravito-photophoretic forces is considered. minimum set effective particle parameters for describing forces, their critical values vertical transport levitation particles are discussed. behaviour two types investigated specifically: (1) soot-like strongly absorbing both solar (visible) IR radiation, (2) sulfate-like which transparent visible, but absorb terrestrial radiation. Only larger than one micrometer can levitate gravito-photophoresis. Particles 1μm be suspended atmosphere. They need to have a variation accommodation coefficient over surface. As rule should density smaller water. Both black white levitated. Gravito-photophoresis explains existence narrow at altitudes approximately 20 50km, also approx. 70 80–83km. thickness less 1km if accomodation exhibits only small differences Transparent may form thick above 50km rather easily.