Role of sulphur photochemistry in tropical ozone changes after the eruption of Mount Pinatubo

Article Abstract:

The eruption of Mount Pinatubo resulted in perturbations in the tropical ozone layer characterized by ozone reductions up to 24-25 kilometers and increases above 28 kilometers. The eruption also resulted in injection of alarge amount of sulfur dioxide in the stratosphere. Sulfur dioxide may form ozone as well as reduce ozone production depending on the radiation absorbed. The role of sulfur dioxide in the disturbances in the ozone layer after the Mount Pinatubo eruption was investigated by simulation modeling. The model was in good agreement with most of the ozone measurements following the eruption.

Models, Ozone layer depletion

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Vertical mixing and coral death in the Red Sea following the eruption of Mount Pinatubo

Article Abstract:

The eruption of Mount Pinatubo, Philippines led to a large phytoplankton population formed in the summer of 1992 in the Gulf of Eilat, Israel, resulting in the widespread death of corals. The eruption caused extremely low temperatures in the winter of 1992 resulting in the vertical mixing of the water in the Red Sea, bringing a large amount of nutrients to the surface. The high concentration of sediments promoted phytoplankton growth. The causes of coral death were probably the corals being covered by algal mats, high concentration of hydrogen sulfide, diseases, or low temperature.

Weather, Water bloom, Algal blooms, Volcanoes, Volcanism

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Atmospheric effects of the Mt Pinatubo eruption

Article Abstract:

Eruption of Mt Pinatubo, on the island of Luzon in the Republic of the Philippines, in June 1991 increased the particulate level of the stratosphere. The eruption released reactive chlorine species in the stratosphere, which decrease the level of ozone through gas-phase chemical reactions. Efficient scattering characteristics of sulfuric acid aerosol, which is present in the stratosphere, enhances the planetary albedo. The higher albedo of the earth's atmospheric system increases the level of solar radiation scattered back into space, cooling the earth.

Analysis, Global warming, Stratosphere

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