Physics
Scientific paper
Oct 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17.1909w&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 17, Oct. 1990, p. 1909-1912.
Physics
16
Atmospheric Chemistry, Atmospheric Moisture, Hydrogen Compounds, Hydrogen Peroxide, Ozone, Stratosphere, Free Radicals, Middle Atmosphere, Upper Atmosphere
Scientific paper
Simultaneous, in situ measurements of OH, HO2, H2O, and O3 from 37-23 km are reported. The partitioning between OH and HO2 and the total HO(x) concentration are compared with expected steady-state values. The ratio of HO2 to OH varies from less than 2 at 36 km to more than 3 at 25 km; in the lower stratosphere this ratio is nearly a factor of two less than predicted. The data are used to calculate HO(x) production and loss rates. The measured HO(x) mixing ratio is consistent with production dominated by the reaction of O(1D) with H2O, and loss controlled by NOy below 28 km and HO(x) above 30 km. The steady-state concentration of H2O2 is inferred from the measured HO2 concentration and calculated photolysis rate. The maximum H2O2 mixing ratio (at 33 km) is predicted to be less than 0.2 ppb.
Dessler Andrew E.
Lloyd Steven A.
Stimpfle R. M.
Weinstock Elliot M.
Wennberg Paul O.
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