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Global Climate Change Digest
A Guide to Information on Greenhouse Gases and Ozone Depletion
Published July 1988 through June 1999

FROM VOLUME 2, NUMBER 4, APRIL 1989

PROFESSIONAL PUBLICATIONS...
STRATOSPHERIC OZONE

Item #d89apr46

"An Improved Rocket Ozonesonde (ROCOZ-A): 3. Northern Mid-latitude Ozone Measurements From 1983 to 1985," R.A. Barnes (Chemal Inc., POB 44, Wallops Island VA 23337), M.A. Chamberlain et al., J. Geophys. Res., 94(D2), 2239-2254, Feb. 20, 1989.

Reports the results of nineteen complete profiles of ozone, pressure, and temperature obtained from the ground to 52 km. Eighteen of the profiles correspond to site overpasses by ozone instruments on NASA and NOAA satellites. There is excellent agreement between this data set and the current Dobson direct-Sun total ozone measurements. This data set provides a transfer standard between satellite instruments with different fundamental ozone measurements.

Item #d89apr47

"Infrared Line Intensity Measurements in the v = 0-1 Band of the ClO Radical," J.B. Burkholder (Aeronomy Lab., R/E/AL2, NOAA, 325 Broadway, Boulder CO 80303), P.D. Hammer et al., ibid., 2225-2234.

The band intensity of ClO as measured by a high-resolution Fourier transform spectrometer was S = 9.68 + or - 1.45 cm-2 atm-1 (95% confidence level) at 296K, which is in agreement with a recent ClO band intensity determination using the concentration-independent Herman-Wallis method of band intensity analysis. This value is a factor of 2 greater than the value recently reported by Kostiuk et al. (1986). Discusses a source of systematic error in the use of the Cl + O3 reaction as a quantitative source of ClO radicals.

Item #d89apr48

"Interannual Temperature Changes in the Antarctic Lower Stratosphere--A Relation to the Ozone Hole," K. Kawahira (Toyama Nat. College Tech., 13 Hongo-cho, Toyama 939, Japan), T. Hirooka, Geophys. Res. Lett., 16(1), 41-44, Jan. 1989.

Determines how the daily zonal mean temperature in the antarctic lower stratosphere has changed interannually during the recent seven-year period associated with remarkable ozone depletion. Results indicate that the antarctic lower stratosphere tended to cool from 1980 to 1985, especially in the polar region during April to November. Also, present results clearly show that the lower stratosphere, where most ozone depletion occurred in spring, tends to cool in autumn, winter and spring, and even for a part of summer, from 1980 to 1986. Discusses relationship between the temperature decline and the ozone depletion.

Item #d89apr49

"Rate Constant Measurement for the Reactions of OH and Cl with Peroxyacetyl Nitrate at 298 K," N. Tsalkani (Lab. de Physico-Chimie de L'Environ., Univ. Paris Val de Marne, 94010 Creteil Cédex, France), A. Mellouki et al., J. Atmos. Chem., 7, 409-419.

Results obtained using the discharge-flow EPR method confirm that the OH + PAN reaction will be the dominant sink of PAN in the middle and upper troposphere, but the reaction Cl + PAN will be negligible in contrast with previous estimations.

Item #d89apr50

"Intercomparison of NO Column Measurements During MAP/GLOBUS 1985," R.L. McKenzie (DSIR, PEL Lauder, Central Otago, New Zealand), W.A. Matthews et al., ibid., 353-367.

The results from the instruments which measure in the infrared and the ultraviolet are self-consistent, and show good agreement with photochemical predictions. On September 19, when the intercomparison was made, the profile measured by the in-situ chemiluminescent instrument differed significantly from the predicted profile, and the measured columns were generally higher.

Item #d89apr51

"Effect of Short-Term Variations in Solar Radiation on Atmospheric Ozone," M. Yu Danilin (Moscow Univ.), G.I. Kuznetsov, Izvestiya, Atmos. and Oceanic Phys., 619-624, Mar. 1988 (English trans. from Russian), 23(8), 1987.

Proposes a method of identifying short-term variations in atmospheric ozone resulting from variations in solar activity. Reveals a close correlation between the ozone concentration with the Wolf number W and the flux F10.7. Develops a one-dimensional atmospheric model to obtain theoretical estimates of the deviation of the ozone concentration caused by changes in solar radiation resulting from variations in solar activity.

Item #d89apr52

"Infrared Measurements of Increased CF2Cl2 (CFC-12) Absorption Above the South Pole," C.P. Rinsland (Atmos. Sci. Div., NASA Langley Res. Ctr., Hampton VA 23665), A. Goldman et al., Appl. Optics, 27(3), 627-630, Feb. 1, 1988.

Derives an increase in the CF2Cl2 total vertical column above the South Pole of 1.24 + or - 0.15 over the 6-year period, or an average rate of increase of 3.6 + or - 2.1%. Spectroscopic parameters that can successfully model CF2Cl2 absorption at low temperatures are needed to improve retrieval accuracies. They could be applied to a number of pre-1980 atmospheric spectral data sets in the literature to obtain an improved record of early CF2Cl2 concentration trends for comparison with estimates of historical release rates.