The products of the^(203,205)Ti(^(50)Ti,2n)fusion-evaporation reactions were studied by using the recently commissioned Argonne Gas-Filled Analyzer(AGFA)at Argonne National Laboratory.
Cloud condensation nuclei(CCN)constitute a reservoir of latent ice-forming nuclei(IFN)active by conden sation-followed-by-freezing and by sorption.Two classes of aerosol particles active as IFN by sorption were found....Cloud condensation nuclei(CCN)constitute a reservoir of latent ice-forming nuclei(IFN)active by conden sation-followed-by-freezing and by sorption.Two classes of aerosol particles active as IFN by sorption were found.The first produces IFN concentrations which are dependent on temperature only.The IFN concen- tration consecutively increases with lowering of temperature and does not respond to the increasing partial water vapor pressure.The second produces IFN concentrations which are dependent on partial water vapor pressure only,The IFN concentration consecutively decreases with decreasing of the partial water vapor pres- sure that takes place with the lowering temperature. Sulfates(mostly ammonium sulfate)constitute an integral part of IFN active by condensation-followed-by- freezing and by sorption.Backward isentropic air parcel trajectories linked polluted air rich in sulfates and clean air with high and low concentrations of IFN active by condensation-followed-by-freezing at-19.7℃ and S_w=0.1%. The experiments were performed in a dynamic filter processing chamber with aerosol particles collected on membrane filters.展开更多
文摘The products of the^(203,205)Ti(^(50)Ti,2n)fusion-evaporation reactions were studied by using the recently commissioned Argonne Gas-Filled Analyzer(AGFA)at Argonne National Laboratory.
文摘Cloud condensation nuclei(CCN)constitute a reservoir of latent ice-forming nuclei(IFN)active by conden sation-followed-by-freezing and by sorption.Two classes of aerosol particles active as IFN by sorption were found.The first produces IFN concentrations which are dependent on temperature only.The IFN concen- tration consecutively increases with lowering of temperature and does not respond to the increasing partial water vapor pressure.The second produces IFN concentrations which are dependent on partial water vapor pressure only,The IFN concentration consecutively decreases with decreasing of the partial water vapor pres- sure that takes place with the lowering temperature. Sulfates(mostly ammonium sulfate)constitute an integral part of IFN active by condensation-followed-by- freezing and by sorption.Backward isentropic air parcel trajectories linked polluted air rich in sulfates and clean air with high and low concentrations of IFN active by condensation-followed-by-freezing at-19.7℃ and S_w=0.1%. The experiments were performed in a dynamic filter processing chamber with aerosol particles collected on membrane filters.
