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Global Climate Change DigestArchives of the
Global Climate Change Digest

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



Item #d95jan101

Two items in J. Geophys. Res., 99(D11), Nov. 20, 1994:

"A Two-Dimensional Global Study of Tropospheric Ozone Production," A. Strand (Nansen Environ. Sensing Ctr., N-5037 Bergen-Solheimsviken, Norway), O. Hov, 22,877-22,895. A transport-chemistry model shows that a 50% cut in industrial VOC emissions leads to about half the reduction in summertime O3 production as does a 50% cut in NOx emissions.

"Interannual Variability over the Eastern North Atlantic Ocean: Chemical and Meteorological Evidence for Tropical Influence on Regional-Scale Transport in the Extratropics," B.G. Doddridge (Dept. Meteor., Univ. Maryland, College Pk. MD 20742), P.A. Dirmeyer et al., 22,923-22,935. Estimates O3 production over western Europe using CO as a tracer for short-lived anthropogenic precursors.

Item #d95jan102

"Convective Transport over the Central United States and Its Role in Regional CO and Ozone Budgets," A.M. Thompson (NASA-Goddard, Greenbelt MD 20771), K.E. Pickering et al., J. Geophys. Res., 99(D9), 18,703-18,711, Sep. 20, 1994.

The central U.S. acts as a chimney for the country. Boundary layer venting of CO and other O3 precursors leads to efficient free tropospheric O3 production, which contributes to high background levels in the eastern U.S. and ozone export to the North Atlantic.

Item #d95jan103

"Evidence of a Long-Term Increase in Tropospheric Ozone from Pic du Midi Data Series: Consequences: Positive Radiative Forcing," A. Marenco, H. Gouget et al., J. Geophys. Res., 99(D8), 16,617-16,632, Aug. 20, 1994 (See Global Climate Change Digest, Sep. 1994)

Item #d95jan104

"Experiment Probes Elevated Ozone Levels over the Tropical South Atlantic Ocean," J. Fishman (MS 401A, NASA-Langley, Hampton VA 23681), Eos, 380, Aug. 16, 1994.

TRACE-A (airborne) measurements give insight into the elevated ozone levels found during September and October 1992. This ozone anomaly is due to complex interaction of chemical and meteorological processes. Complete interpretation of the results is underway and incorporates the use of satellite imagery and a meteorological model of the tropics.

Item #d95jan105

"Relationship of Ozone and Carbon Monoxide over North America," M. Chin (Dept. Earth & Planetary Sci., Harvard Univ., Cambridge MA 02138), D.J. Jacob et al., J. Geophys. Res., 99(D7), 14,565-14,573, July 20, 1994.

Field data that show a strong correlation between O3 and CO concentrations in summer offer a test for evaluating the ability of photochemical models to simulate O3 production. A three-dimensional, continental-scale model gave a good simulation. Explores the use of the DO3/DCO ratio as indication of anthropogenic sources.

Item #d95jan106

"Effects of Reductions in Stratospheric Ozone on Tropospheric Chemistry Through Changes in Photolysis Rates," J.S. Fuglestvedt, J.E. Jonson, I.S.A. Isaksen, Tellus, 46B(3), 172-192, July 1994. (See Global Climate Change Digest, p. 3, Sep.)

Item #d95jan107

"Climatology of Tropospheric Ozone in Southern Europe and Its Relation to Potential Vorticity," M. Beekmann (CNRS, Univ. Paris, Boite 102-4, Pl. Jussieu, 75252 Paris cedex 05, France), G. Ancellet, G. M├ęgie, J. Geophys. Res., 99(D6), 12,841-12,853, June 20, 1994.

Statistical analysis of data from balloon-borne sondes shows that the interannual variability of potential vorticity can cause dynamically induced trends of ozone concentration, which must be taken into account to accurately determine the portion from human activity.

Item #d95jan108

"Role of Deep Cloud Convection in the Ozone Budget of the Troposphere," J. Lelieveld (Air Quality Dept., Wageningen Univ., POB 8129, 6700 EV Wageningen, Neth.), P.J. Crutzen, Science, 264(5166), 1759-1761, June 17, 1994.

Model simulations suggest that the net result of upward and downward transport processes is a 20% overall reduction in total tropospheric O3. However, the net atmospheric oxidation efficiency is enhanced by 10% to 20%

Item #d95jan109

"Growth of Continental-Scale Metro-Agro-Plexes, Regional Ozone Pollution, and World Food Production," W.L. Chameides, P.S. Kasibhatla et al., Science, 264(5155), 74-77, Apr. 1, 1994. (See Global Climate Change Digest, May 1994)

Item #d95jan110

"Year 2020: Consequences of Population Growth and Development on Deposition of Oxidized Nitrogen," J.N. Galloway, H. Levy II, P.S. Kasibhatla, Ambio, 23(2), 120-123, Mar. 1994. (See Global Climate Change Digest, May 1994)

Item #d95jan111

Special issue: "Surface Ozone," Atmos. Environ., 28(1), Jan. 1994. Contains 15 papers that present data from a global network and from several countries, and discuss trends, meteorological parameters, anthropogenic influences, and the stratospheric intrusion phenomenon and its impact on measurements.

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