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Simultaneous, in situ measurements of OH, HO_2, O_3, and H_2O: A test of modeled stratospheric HO_x chemistry

Wennberg, P. O. and Stimpfle, R. M. and Weinstock, E. M. and Dessler, A. E. and Lloyd, S. A. and Lapson, L. B. and Schwab, J. J. and Anderson, J. G. (1990) Simultaneous, in situ measurements of OH, HO_2, O_3, and H_2O: A test of modeled stratospheric HO_x chemistry. Geophysical Research Letters, 17 (11). pp. 1909-1912. ISSN 0094-8276. doi:10.1029/GL017i011p01909.

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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.

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Wennberg, P. O.0000-0002-6126-3854
Alternate Title:Simultaneous, in situ measurements of OH, HO2, O3, and H2O: A test of modeled stratospheric HOx chemistry
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.
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NSF Graduate Research FellowshipUNSPECIFIED
Issue or Number:11
Record Number:CaltechAUTHORS:20140703-091548721
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46801
Deposited By: Ruth Sustaita
Deposited On:03 Jul 2014 17:41
Last Modified:10 Nov 2021 17:29

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