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Volcanic Dust
Brian P.
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http://www.octopus.gma.org/surfing/weather/dust.htl www.rsd.nasa.gov/rsd/images/Pinatubo.html
Volcanic dust is dust that is spewed out of volcanoes after an eruption that is extremely hot and cools over hundreds of years of years. People extract the dust once it cools down. Volcanic dust is mainly made by regular dust and ash getting hot and spewed out of the volcano. When a volcano spews the dust and ash each piece is spread 20-30 feet each. The fall-out times of the dust particles are very short and they usually linger for a couple months spreading as a long live veil in the stratosphere over much of the earth. The volcanic dust and other particles that are released into the atmosphere scatter visible light coming from the sun and infrared radiation causing short-term cooling in the area.
