into the stratosphere as larger eruptions at lower latitudes Stratospheric dispersal: Aerosols from tropical eruptions have the potential to spread around the globe (e.g Pinatubo). Atmospheric influence of eruption outside the tropics is contained within the middle and polar latitudes of the hemisphere of origin
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Global Effects of the 1991 Pinatubo Eruption
3. Magma Chemistry Mt. St. Helens, USA (1980): Relatively small eruption produced About 0.5 km3of tephra and 0.3 mega tons of sulfuric acid aerosols –no climatic effect El Chichon Volcano, Mexico (1982): Relatively small eruption produced about 0.3 Km3of tephra but 20 mega tons of sulfuric acid aerosols –measurable climatic effect