Ozone trend

Fig. 8-3. Relationship between Los Angeles Basin s urban sources of photochemical smog and the San Bernardino Mountains, where ozone damage has occurred to the ponderosa pines. The solid lines are the average daily 1-hr maximum dose of ozone (ppm), )uly-September 1975-1977. Source Adapted from Davidson, A., Ozone trends in the south coast air basin of California, in "Ozone/Oxidants Interaction with the Total Environment.". A ir Pollution Control Association, Pittsburgh, 1979, pp. 433-450.

Report of the International Ozone Trends Panel 1988, Global Ozone Research and Monitoring Project Report No. 18, World Meteorological Organization, Geneva, Switzerland, 1988. 

Watson, R. Ozone Trends Panel, Executive Summary. NASA,... 

Jaffe, D The Relationship between Anthropogenic Nitrogen Oxides and Ozone Trends in the Arctic Troposphere, in The Tropospheric Chemistry of Ozone in the Polar Regions (H. Niki and... 

Randel, W. J., and F. Wu, TOMS Total Ozone Trends in Potential Vorticity Coordinates, Geophys. Res. Lett., 22, 683-686 (1995). 

Randeniya, L. K P. F. Vohralik, I. C. Plumb, K. R. Ryan, and S. L. Baughcum, Impact of Heterogeneous BrONOj Hydrolysis on Ozone Trends and Transient Ozone Loss during Volcanic Periods, Geophys. Res. Lett., 23, f633-f636 (f996b). 

Detecting and quantifying ozone trends in midlatitudes from anthropogenic perturbations is complex due to the effects of natural variations in stratospheric ozone and to the interactions between various effects (e.g., Krzyscin, 1994 Brasseur et al., 1995 Callis et al., 1997 Zerefos et al., 1997 Hood, 1997 Callis et al.,... 

Cunnold, D. M H. Wang, W. P. Chu, and L. Froidevaux, Comparisons between Stratospheric Aerosol and Gas Experiment II and Microwave Limb Sounder Ozone Measurements and Aliasing of SAGE II Ozone Trends in the Lower Stratosphere, J. Geophys. Res., 101, 10061-10075 (1996). 

De Muer, D., and H. De Backer, Revision of 20 Years of Dobson Total Ozone Data at Uccle (Belgium) Fictitious Dobson Total Ozone Trends Induced by Sulfur Dioxide Trends, J. Geophys. Res., 97, 5921-5937 (1992). 

Hollandsworth, S. M., R. D. McPeters, L. E. Flynn, W. Planet, A. J. Miller, and S. Chandra, Ozone Trends Deduced from Combined Nimbus 7 SBUV and NOAA 11 SBUV/2 Data, Geophys. Res. Lett, 22, 905-908 (1995). 

Komhyr, W. D., G. C. Reinsel, R. D. Evans, D. M. Quincy, R. D. Grass, and R. K. Leonard, Total Ozone Trends at Sixteen NOAA/CMDL and Cooperative Dobson Spectrophotometer Observatories during 1979-1996, Geophys. Res. Lett, 24, 3225-3228 (1997). 

Kundu, N., and M. Jain, Total Ozone Trends over Low Latitude Indian Stations, Geophys. Res. Lett, 20, 2881-2883 (1993). 

Janach, W. E., Surface Ozone Trend Details, Seasonal Variations, and Interpretation, J. Geophys. Res., 94, 18289-18295 (1989). 

Davidson, A., Update on Ozone Trends in California s South Coast Air Basin, J. Air Waste Manage. Assoc., 43, 226-227 (1993). 

Lindsay, R. W., J. L. Richardson, and W. L. Chameides, Ozone Trends in Atlanta, Georgia Have Emission Controls Been Effective J. Air Pollut. Control Assoc., 39, 40-43 (1989). 

Zeldin, M. D., and D. M. Thomas, Ozone Trends in the Eastern Los Angeles Basin Corrected for Meteorological Variations, Paper... 

The fourth issue is the observed, unexplained decadal wintertime decline in ozone as reported by the Ozone Trends Panel and the loss of ozone in the lower stratosphere. Does the loss result from the perturbed photochemistry initiated by PSCs inside the polar vortex Or is it a result of photochemistry associated with the ubiquitous sulfate aerosol layer Are observed seasonal and latitudinal trends in reactive trace species consistent with the observed seasonal and latitudinal declines in ozone ... 

Watson, R. T. Ozone Trends Panel Prather, M. J. Ad Hoc Theory Panel Kurylo, M. J. NASA Panel for Data Evaluation. Present State of the Knowledge of the Upper Atmosphere 1988 An Assessment Report National Aeronautics and Space Administration Washington, DC, 1988 NASA Reference Publication 1208. 

Bojkov, R. D., Bishop, L., Fioletov, V.E., 1995b Total ozone trends from quality controlled ground-based data (1964-1994)./ Geophys. Res., 100,25867-25876. 

Chandra, S., Varotsos, C.. and Flynn, L. E. (1996) The mid-latitude total ozone trends in the northern hemisphere, Geophys. Res. Lett. 23,555-558. 

The ozone behaviour on 550 K has been in August similar to July. On the 475 K surface ozone has declined both inside and on the edge region of the vortex, but only the linear ozone trend on the edge region is statistically significant -0,12 ppmV/year (se 0,04). On the 435 K surface there is no trend detectable in August. 

TABLE 1. Linear ozone trends over Marambio during the period 1990-1998 (ppmV/year standard error)... 

On the 435 K surface the only statistically significant linear ozone trend is the trend inside the vortex. The average decline of ozdne has been 0,11 ppmV/year (se 0,04). It is... 

Total ozone observations have been collected since 1992 by means of Brewer spectrophotometry at Rome (41.9°N, 12.5°E, 60 m a.s.l.) and lspra (45.8°N, 8.63°E, 240 m a.s.l.). A filtering technique is applied to the Dobson ozone long time series of Vigna di Valle (42.08°N, 12.22°E, 262 m a.s.l.), Arosa (46.78°N, 9.68°E, 1840 m a.s.l.) and Lerwick (60.13°N, 1.18°W, 80 m a.s.l.) and to the Italian Brewer ozone data, in order to investigate on different time scales [1]. The aim of this analysis is to single out any effective ozone trend, together with the role of ozone fluctuations due to weather patterns, at the selected Northern Hemisphere middle latitudes sites. 

Lerwick. It is a filtering method that allows the separation of the different time scales involved and to single out the effective ozone trend. 

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