Simultaneous, in situ measurements of OH, HO2 , O3 , and H2 O: A test of modeled stratospheric HOx chemistry Academic Article uri icon


  • Simultaneous, in situ measurements of OH, HO2, H2O, and O3 from 3723 km are reported. The partitioning between OH and HO2 and the total HOx concentration are compared with expected steadystate 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 HOx production and loss rates. The measured HOx mixing ratio is consistent with production dominated by the reaction of O(1D) with H2O, and loss controlled by NOy below 28 km and HOx above 30 km. The steadystate 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. Copyright 1990 by the American Geophysical Union.

published proceedings

  • Geophysical Research Letters

author list (cited authors)

  • Wennberg, P. O., Stimpfle, R. M., Weinstock, E. M., Dessler, A. E., Lloyd, S. A., Lapson, L. B., Schwab, J. J., & Anderson, J. G.

complete list of authors

  • Wennberg, PO||Stimpfle, RM||Weinstock, EM||Dessler, AE||Lloyd, SA||Lapson, LB||Schwab, JJ||Anderson, JG

publication date

  • January 1, 1990 11:11 AM