Ashfall dispersal for the 16 September 1986, eruption of Lascar, Chile, calculated by a turbulent diffusion model

Details Ashfall dispersal for the 16 September 1986, eruption of Lascar, Chile, calculated by a turbulent diffusion model Ashfall dispersal for the 16 September 1986, eruption of Lascar, Chile, calculated by a turbulent diffusion model

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18.1237g&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 18, July 1991, p. 1237-1240.

Physics

21

Ashes, Turbulent Diffusion, Two Dimensional Models, Volcanology, Wind Direction, Wind Velocity, Atmospheric Diffusion, Chile, Goes Satellites, Particulates, Satellite Imagery

Scientific paper

A two dimensional model for the dispersal of volcanic ash, modified from that of Suzuki (1983), is applied to the September 16, 1986 eruption of Lascar, in northern Chile. The result is an isopach map predicting ground concentrations of ash. The map shows two local maxima along distinct dispersal axes and predicts that the deposit was detached from the source. Predicted concentrations are in agreement with a single reported thickness measurement.

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