Upper stratosphere negative ion composition measurements and inferred trace gas abundances

Details Upper stratosphere negative ion composition measurements and inferred trace gas abundances Upper stratosphere negative ion composition measurements and inferred trace gas abundances

Feb 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984p%26ss...32..169a&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 32, Feb. 1984, p. 169-177. Research supported by the Bundesministerium für Fo

Computer Science

Sound

19

Atmospheric Composition, Atmospheric Sounding, Gas Composition, Negative Ions, Stratosphere, Trace Elements, Atmospheric Chemistry, Reaction Kinetics, Rocket Sounding

Scientific paper

In situ composition measurements of atmospheric negative ions were made at 40.8 km altitude using a balloon-borne mass spectrometer with large mass range and improved mass resolution. The data obtained show marked differences compared to previous data obtained mostly around or below 33 km. It appears that these differences are mostly due to a higher atmospheric temperature, a lower nitric acid vapor abundance and a larger HSO3-vapor abundance prevailing at the higher altitude. A particularly striking feature is the relatively large fractional abundance of HSO3-containing cluster ions. Another interesting result is that nitric acid vapor abundances can be inferred from the negative ion composition data with better accuracy than is possible for lower altitudes. The reason is that collisional ion dissociation occurring during ion sampling is less disturbing. The inferred nitric acid vapor abundance for 40.8 km altitude is consistent with current 2-dimensional model calculations.

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