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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 5, NUMBER 12, DECEMBER 1992

PROFESSIONAL PUBLICATIONS...
STRATOSPHERIC OZONE: TRENDS

Item #d92dec28

"Evidence for Vertical Ozone Redistribution since 1967," R. Furrer (Inst. Weltraumwissenschaften, Freie Univ. Berlin, Fabeckstr. 69, D-1000 Berlin 33, Ger.), W. Döhler et al., J. Atmos. Terr. Phys., 54(11-12), 1423-1445, Nov.-Dec. 1992.

Dobson and balloon-borne measurements made near Berlin have been processed into the longest European data set of total column density, altitude-dependent partial pressures and corresponding temperatures. Ozone concentrations over the past 24 years increased in the middle stratosphere and in the troposphere, but decreased in the lower stratosphere (consistent with destruction by anthropogenic compounds).

Item #d92dec29

"Trends in Column Ozone Based on TOMS Data: Dependence on Month, Latitude, and Longitude," X. Niu (Dept. Statistics, Florida State Univ., Tallahassee FL 32306), J.E. Frederick et al., J. Geophys. Res., 97(D13), 14,661-14,669, Sep. 20, 1992.

Statistical analysis of data from 70° S to 70° N for 1978-1990 shows that trends are highly seasonal and location dependent. For high latitudes most of the monthly trends are negative; equatorial trends are near zero. The largest negative trends found (29% per decade) appeared in October around 70° S and 20° W-100° W.

Item #d92dec30

"On the Stability of the Ozone Layer at Tromso," K. Henriksen (Auroral Observatory, Univ. Tromso, 9000 Tromso, Norway), T. Svenoe, S.H.H. Larsen, J. Atmos. Terr. Phys., 54(9), 1113-1117, Sep. 1992. Measurements since 1935 show no decreasing trend of ozone content and no correlation with the increasing chlorine and halogen compound content of the atmosphere in the Scandinavian sector of the Arctic.

Item #d92dec31

"Long-Term Winter Total Ozone Changes at Macquarie Island," P. Lehmann (Bur. Meteor., GPO Box 1289K, Melbourne, 3001 Australia), D.J. Karoly et al., Geophys. Res. Lett., 19(14), 1459-1462, July 24, 1992. Measurements at 55° S between the 1970s and 1987-90 show reductions of about 12% during July and September.

Item #d92dec32

Three items from J. Atmos. Terr. Phys., 54(5), May 1992:

"A New Umkehr Inversion Algorithm," C.L. Mateer (255 Bamburgh Circ., #1210, Scarborough ON M1W 3T6, Can.), J.J. Deluisi, 537-556. Compares a new and the old (1964) algorithms for vertical ozone profiles, and discusses implications for trend analysis.

"Results of the New and Old Umkehr Algorithm Compared with Ozone Soundings," H.U. Dutsch (Fed. Inst. Technol., CH-8092 Zurich, Switz.), J. Staehelin, 557-569. Vertical ozone profiles retrieved using the new algorithm of Mateer and DeLuisi (1992) were compared with those in use at the World Ozone Data Center in Toronto. Implications for trend detection are discussed.

"Long-Term Tropospheric and Lower Stratospheric Ozone Variations from Ozonesonde Observations," J. London (Dept. Astrophys., Univ. Colorado, Boulder CO 80309), S.C. Liu, 599-625. Discusses long-term mean pressure-latitude seasonal distributions for the four seasons spanning up to 20 years, including a negative trend of 0.6% per year in the lower stratosphere.