A steady state model of negative ions in the lower stratosphere

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Atmospheric Chemistry, Atmospheric Composition, Negative Ions, Stratosphere, Abundance, Atmospheric Models, Reaction Kinetics, Vertical Distribution

Scientific paper

A chemical model of negative ions in the lower stratosphere is presented. Under the steady state condition at each height from 15 to 30 km, the fractional abundances of the individual negatively-charged constituents were calculated by simulating the chemical processes which start from electrons and reach the ion clusters having NO3(-) and HSO4(-) cores. The computed result shows that while the NO3(-)(HNO3)2 ions predominate at lower than 26 km in altitude, the HSO4(-)(HNO3)m type of ions increase slowly with height and the HSO4(-)(H2SO4)n type of ions increase rapidly with height around 30 km. The result is compared with the experimental result which was obtained by the in situ balloon-borne mass spectrometric measurements (Viggiano et al., 1983). Both results have comparable height profile of respective ions with each other.

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