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PETROPAVLOVSK-KAMCHATSKY, April 19 (Itar-Tass) -
The Shiveluch volcano in Russia’s Far Eastern Kamchatka region has erupted volcanic ash to the height of 7.5 kilometres above the sea level, a source in the Kamchatka branch of the Russian Academy of Sciences’ Geophysical service told Itar-Tass on Monday, adding that the eruption posed no hazard to nearby settlements.
Volcanoes spew lots of noxious compounds and gases (like hydrogen sulfide, sulfur dioxide) which have varying impacts on the environment and climate.
When a volcano erupts, massive venting of sulfuric gases into the atmosphere often follows, and this gas naturally converts to sulfate aerosols which can remain in the stratosphere for several years. These aerosol “clouds” can remain in the upper atmospheric and can block some of the Sun’s in-coming radiative energy, preventing it from reaching the lower atmosphere and planet surface. They can also absorb long-wave radiation deflecting from the Earth’s surface. The short-term result is a cooling of the upper atmosphere but with some heat trapping nearer to the surface.