Abstract
Observations using a laser radar system at Aberystwyth (52°25′n, 4°4′w) have shown enhanced concentrations of aerosols at heights up to ∼30 km. It is believed that these enhancements have been caused by eruptions of El Chichón (17°33′ n, 93°20′ w) in southern Mexico during the period 28 March to 4 April 1982. Data collected during 45 nights in the period November 1982 to February 1983 have shown the presence of such enhancements consistently since observations started on 6 November and represent the most northern excursion of the stratospheric cloud by that date1,2. The results indicate a very pronounced variability in the cloud, both on a night-to-night basis and within given nights, the peak value for the ratio of backscatter from aerosols to that from molecules varying between 2 and 12. In these changes the aerosols can serve as a tracer of transport processes at stratospheric heights3.
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References
EOS 64, 1 (1983).
Labitzke, K., Narjokat, B. & McCormick, M. P. Geophys. Res. Lett. 10, 24–26 (1983).
McCormick, M. P. in Atmospheric Effects and Potential Climatic Impact of the 1980 Eruption of Mount St Helens (ed. Deepak, A.) (125–130 NASA Conf. Publ. 1982).
U.S. Standard Atmosphere Supplements (U.S. Government Printing Office, Washington DC, 1966).
Thomas, L., Chaloner, C. P. & Bhattacharyya, S. K. Nature 289, 473 (1982).
Hirono, M. & Shibata, T. Geophys. Res. Lett. 10, 152–154 (1983).
Parker, D. E. & Brownscombe, J. L. Nature 301, 406–408 (1983).
Dunkerton, T. J. atmos. Sci. 35, 2325–2333 (1978).
Hunten, D. M. Geophys. Res. Lett. 2, 26–28 (1975).
Newell, R. E., Kidson, J. W., Vincent, D. G. & Baer, G. J. The General Circulation of the Tropical Atmosphere Vol. 1 (MIT Press, Boston, 1974).
Hofmann, D. J. & Rosen, J. M. J. atmos. Sci. 38, 168–181 (1981).
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Thomas, L., Jenkins, D., Wareing, D. et al. Laser radar observations in mid-Wales of aerosols from the El Chichón eruption. Nature 304, 248–250 (1983). https://doi.org/10.1038/304248a0
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DOI: https://doi.org/10.1038/304248a0
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