Seasonal variations of water and odd nitrogen concentrations at stratopause altitudes

Details Seasonal variations of water and odd nitrogen concentrations at stratopause altitudes Seasonal variations of water and odd nitrogen concentrations at stratopause altitudes

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jatp...44..471z&link_type=abstract

(IAU, IAMAP, and COSPAR, Middle Atmosphere Sciences Symposium, Hamburg, West Germany, Aug. 1981.) Journal of Atmospheric and Ter

Physics

2

Annual Variations, Atmospheric Composition, Nitrogen Oxides, Photochemical Reactions, Stratopause, Water Vapor, Atmospheric Chemistry, Atmospheric Moisture, Ozonometry, Reaction Kinetics

Scientific paper

An attempt is made to derive the seasonal variations of water vapor and odd nitrogen concentrations in the upper stratosphere from a model of the kinetics of ozone formation and available ozone sounding data. The photochemical model employed allows the calculation of the altitude distribution of atmospheric oxygen, hydrogen, and nitrogen compounds in the range 30 to 80 km. Numerical fitting of model parameters to ozone data above Wallops Island indicates the volume mixing ratio of water vapor to vary from 1 to 4 ppmv over the course of a year, while the volume mixing ratio for nitrogen oxides (NO and NO2) varies between 10 and 45 ppbv, with average values 2.6 ppmv and 31 ppbv, respectively. Variations in the mixing ratios are observed to be negligible from April to September, but increase substantially for the remainder of the year. The calculated values are in accord with experimental data, although the incorporation of chlorine compounds may appreciably affect odd nitrogen mixing ratios.

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