Simultaneous, in situ measurements of OH, HO_2, O_3, and H_2O: A test of modeled stratospheric HO_x chemistry
Abstract
Simultaneous, in situ measurements of OH, HO_2, H_2O, and O_3 from 37–23 km are reported. The partitioning between OH and HO_2 and the total HO_x concentration are compared with expected steady-state values. The ratio of HO_2 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 HOx mixing ratio is consistent with production dominated by the reaction of O(1D) with H_2O, and loss controlled by NO_y below 28 km and HO_x above 30 km. The steady-state concentration of H_2O_2 is inferred from the measured HO_2 concentration and calculated photolysis rate. The maximum H_2O_2 mixing ratio (at 33 km) is predicted to be less than 0.2 ppb.
Additional Information
© 1990 American Geophysical Union. Received: 12 Jul 1990. Accepted: 6 Aug 1990. Paper number: 90GL01826. This flight could not have been carried out with out the special assistance on short notice of: at NASA headquarters, R. Watson; at NSBF, D. Ball and the NSBF support staff; at Harvard, J. Demusz, N. Hazen, B. Heroux, T. Schiller, D. Spillane, and E. Thompson, P. Wennberg acknowledged the support of NSF Graduate Fellowship. Funds provided by NASA contract NASW 3960.Attached Files
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Additional details
- Alternative title
- Simultaneous, in situ measurements of OH, HO2, O3, and H2O: A test of modeled stratospheric HOx chemistry
- Eprint ID
- 46801
- Resolver ID
- CaltechAUTHORS:20140703-091548721
- NSF Graduate Research Fellowship
- NASW 3960
- NASA
- Created
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2014-07-03Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field
- Caltech groups
- Division of Geological and Planetary Sciences