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CRU Information Sheet no. 2: The Causes of Climatic Change
Volcanic pollution Explosive volcanic eruptions can inject large quantities of dust and the gas, sulphur dioxide, high into the ... recent volcanic eruptions suggest that an individual eruption may generate global cooling amounting to two or three tenths of a degree Celsius. The effect lasts for a year or two. Major eruptions have ...
www.cru.uea.ac.uk

CRU Information Sheet no. 13: Volcanoes and their effect on climate
In the upper four panels, Figure 1 shows the effects on global average temperatures of four low-latitude eruptions between the 1880s and 1980s. Whilst the individual eruptions ... . Material from major eruptions in the middle-to-high latitudes of each hemisphere tends to remain poleward of the eruption latitude. Major Icelandic or Alaskan/Aleutian/Kamchatkan eruptions, therefore, only ...
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Ozone Depletion | Ozone Layer | Stratospheric Ozone
Earth is averaged. Volcanic Eruptions and Ozone Volcanic eruptions are one of the few natural things that can have a diminishing effect ... in chlorine in the stratosphere following even the most major eruptions. It is also possible that ice particles containing sulphuric acid from large volcanic eruptions may contribute to ozone loss. When chlorine ...
www.ozone-hole.org.uk

HAZARDS
This hazard may continue for a year or more after eruptions, longer for very large eruptions. Fuego (right) and Acatenango (left) as seen from the highway along the ... between these eruptions is 80-125 yeaers. Minor eruptions with a shorter repose period do not significantly affect the sedimentary system, which proceeds as a series of short pulses. Since major eruptions betwen 1972 ...
www.geo.mtu.edu

NGDC Natural Hazards Stratovolcano Poster
The clouds of ash from the volcanic eruptions present a hazard to aviation. NOAA uses imagery from polar ... ) to warn aircraft pilots of hazardous ash clouds. Particles erupted into the stratosphere during major eruptions can change global temperature by several degrees, altering weather patterns and effecting global agriculture ...
www.ngdc.noaa.gov

Redreaming the Plain: an e-journal about sustainability
New arrivals join others under the shade of the melaleucas, adding their opinions to the major topic of conversation, the drought. >> Susan Kruss, Reunion Eight years old, the word sings ... plain of southeastern Australia, and with the indigenous peoples, who witnessed the most recent volcanic eruptions. (See the national resource audit for this bioregion.) The arrival of Europeans changed this ...
www.redreaming.info

lithosphere
(HCl). Some scientists argue that the amount of chlorine put into the stratosphere by a major volcanic eruption rivals that of anthropogenically produced chlorine. In the 1980s, emissions of CFCs added ... of the amount of chlorine spewed into the atmosphere by a major volcanic eruption ranged from 0.1 to 1 Mton. Eruptions such as El Chicon in 1982 and Pinatubo in 1991 ...
www.cotf.edu

volcanoes and climate
Sulfur hazes are believed to have been the primary cause of the global cooling that occurred after the Pinatubo and Tambora eruptions. For many months ... , and cooling dominates. However, over long periods of time (thousands or millions of years), multiple eruptions of giant volcanoes, such as the flood basalt volcanoes, can raise the carbon dioxide levels ...
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March 2, 2004: The Sixth Great Extinction
Then about 245 million years ago, up to 95 percent of all animals ... —including the dinosaurs—were eliminated. Among the possible causes of these mass extinctions are volcanic eruptions, meteorites colliding with the earth, and a changing climate. After each extinction, it took upwards ...
www.earth-policy.org

MTU Volcanoes Page
Is this a good definition? Is this a volcano? How about ... many types of volcanic eruptions which produce different types of volcanic hazards. IAVCEI web site Safety at volcanoes is a major concern--before ... it is used to tell us about activity. Satellite Detection of eruptions Satellite sensors around the world are used to keep track ...
www.geo.mtu.edu