A Caltech Library Service

A critical analysis of ClO and O_3 in the mid-latitude stratosphere

Froidevaux, Lucien and Allen, Mark and Yung, Yuk L. (1985) A critical analysis of ClO and O_3 in the mid-latitude stratosphere. Journal of Geophysical Research D, 90 (D7). pp. 12999-13029. ISSN 0148-0227. doi:10.1029/JD090iD07p12999.

PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


In the upper stratosphere, an altitude range in which ozone should be in photochemical steady-state, calculated ozone abundances that are derived from a one-dimensional photochemical model with updated chemistry are up to 60% smaller than mean observed values. On the other hand, the model results for the key free radicals (HO_x, NO_x, and ClO_x species) in the catalytic destruction of ozone are shown to be in reasonable agreement with available measurements. The general validity of the model simulation of ClO_x chemistry is confirmed through a detailed intercomparison between the computed ClO diurnal variation and recently published ground-based microwave observations. Since many field measurements are performed near sunrise or sunset, the uncertainties in the model results arising from the details of the radiation field calculations at large zenith angles are discussed. Although the calculated ozone discrepancy could be the result of a number of errors in adopted photochemical parameters, a sensitivity analysis shows that no reasonable change in any one or two parameters can resolve this problem. The limited available observations regarding the ratio of atomic oxygen to ozone suggest a possible discrepancy in that quantity, which could be responsible for a large part of the ozone problem.

Item Type:Article
Related URLs:
URLURL TypeDescription
Yung, Yuk L.0000-0002-4263-2562
Alternate Title:A critical analysis of ClO and O3 in the mid-latitude stratosphere
Additional Information:© 1985 by the American Geophysical Union. Paper number 5D0467. Received August 13, 1984; revised April 9, 1985; accepted April 17, 1985. This work was facilitated by discussions and communications (often in advance of publication) with many individuals. In this respect, we thank J. W. Birks, W. B. DeMore, R. L. de Zafra, P. Fabian, C. B. Farmer, J. E. Frederick, G. W. Kattawar, L. F. Keyser, M. T. Leu, J. J. Margitan, R. T. Menzies, M. j. Moiina, S.S. Prasad, O. F. Raper, S. P. Sander, N. D. Sze, P.M. Solomon, and J. W. Waters. This research was supported by NASA grant NAGW-413. Contribution 4011 of the Division of Geological and Planetary Sciences, California Institute of Technology.
Funding AgencyGrant Number
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Caltech Division of Geological and Planetary Sciences4011
Issue or Number:D7
Record Number:CaltechAUTHORS:20140903-100531089
Persistent URL:
Official Citation:Froidevaux, L., M. Allen, and Y. L. Yung (1985), A critical analysis of CLO and O3 in the mid-latitude stratosphere, J. Geophys. Res., 90(D7), 12999–13029, doi:10.1029/JD090iD07p12999
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:49184
Deposited By: Tony Diaz
Deposited On:03 Sep 2014 18:33
Last Modified:10 Nov 2021 18:40

Repository Staff Only: item control page