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Publisher: Tellus B
Journal: Tellus B
Languages: English
Types: Article
Increases in tropospheric ozone (O3) abundance are likely to take place in the near future in the populous and rapidly developing countries in the tropics and subtropics. An accurate evaluation of the future impact of increasing industrial activities in tropical and subtropical areas requires knowledge of the background levels of ozone. New ozone monitoring stations have been installed at several sites by the World Meteorological Organization (WMO) since the mid-90s. We analyze ozone data collected during two years since April 1996 at Cerro Tololo (30°S, 70°W, 2200 m.a.s.l.) some 50 km east from the city of La Serena. In this paper, we describe some of the atmospheric chemistry and meteorology that characterizes the Tololo site. The data show a seasonal variation with maximum mixing ratios in late winter and spring and minimum mixing ratios in late summer and early fall. These variations are most likely associated with the large-scale subsidence of the Hadley circulation and the location of the subtropical jet stream (STJ). Also, there is a diurnal variation that is probably partly associated with a mountain wind flow which is strongest in late spring and summer months. No significant mixing with marine boundary layer air perturbed by anthropogenic activities is apparent from the data. We find the Cerro Tololo site to be generally representative for background conditions of free-tropospheric air in the subtropics of the Southern Hemisphere. This work is done within the framework of a larger effort recently started by several Chilean institutions in cooperation with research centers abroad.DOI: 10.1034/j.1600-0889.2000.00959.x
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    • Aceituno, P. 1988. On the functioning of the Southern Oscillation in the South American Sector. Part I. Surface Climate. Mon. Wea. Rev. 116, 505-524.
    • Crutzen, P. 1995. Ozone in the troposphere. In: Composition, chemistry and climate of the atmosphere (ed. H. Singh.). Van Nostrand Reinold Publ., New York, pp. 349-393.
    • Fawcett, R. J. B. 1998. Seasonal climate summary southern hemisphere (winter 1997): a developing El Nin˜ o event. Australian Meteorological Magazine 47, 151-158.
    • Fishman, J., Watson, C., Larsen, J. and Logan, J. 1990. Distribution of tropospheric ozone derived from satellite data. J. Geophys. Res. 95, 3599-3617.
    • Gilford, M. T., Vojtesak, M. J., Myles, G., Bonan, R. C. and Martens, D. L. 1992. South America south of the Amazon river. a climatological study. Technical Note. USAF Environmental Technical Applications Center (USAFETAC), Scott AFB, Illinois.
    • Holton, J., Haynes, P., McIntyre, M., Douglas, A., Rood, R. and Pfister, L. 1996. Stratosphere-troposphere exchange. Rev. of Geophys. 33, 403-409.
    • Kalnay, E., Kanamitsu, M., Listler, R., Collins, W., Deaven, D., Gardin, Ll. Iredell, M., Saha, S., White, G., Woolen, J., Zhu, Y., Chelliah, M., Ebissuzaki, W., Higgins, W., Janowiak, J., Mo, K. C., Ropelewski, C., Wang, S., Leetmaa, A., Reynolds, R., Jenne, J. and Dennis, J. 1996. The NCEP/NCAR 40-year reanalysis project. Bolletin of American Meteorological Society 77, 437-471.
    • Oltmans, S. and Levy, H. 1992. Seasonal cycle of surface ozone over western North Atlantic. Nature 358, 392-394.
    • Oltmans, S. and Levy, H. 1994. Surface ozone measurements from a global network. Atmos. Env. 28, 9-24.
    • Roelofs, C. and Lelieveld, J. 1997. Model study of the influence of cross-tropopause ozone transport on tropospheric ozone levels. T ellus 49B, 38-55.
    • Rutllant, J. and Fuenzalida, H. 1991. Synoptic aspects of the Central Chile rainfall variability associated with the southern oscillation. International J. of Climatology 11, 63-76.
    • Rutllant, J. and Garreaud, R. 1995: Meteorological air pollution potential for Santiago Chile: towards an objective episode forecasting. Env. Monitoring and Assessment 34, 223-244.
    • Walland, D. J. 1998. Seasonal climate summary southern hemisphere (spring 1997): a developing El Ni n˜o event. Australian Meteorological Magazine 47, 159-166.
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