Lidar observations of the stratospheric aerosol scattering at São José dos Campos (23°S, 46°W) show a very large increase in the stratospheric aerosol burden to have occurred in mid‐1982. Peak scattering ratios greater than 5 have been observed, as compared with pre‐enhancement values between 1.1 and 1.2, representing an increase by more than an order of magnitude in particulate scattering. It is concluded that the main source of the dust was the eruption of El Chichón in Mexico in late March and early April of 1982.
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Clemesha et al. (1983) studied this question.
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