Wednesday, March 30, 2016

Volcanoes and their effect on the planet's weather

Volcanoes often affect our climate by emitting aerosols and carbon dioxide into the atmosphere. Aerosols block sunlight and contribute to short term cooling, but do not stay in the atmosphere long enough to produce long term change. Carbon dioxide (CO2) has a warming effect. For about two-thirds of the last 400 million years, geologic evidence suggests CO2 levels and temperatures were considerably higher than present. Each year 186 billion tons of carbon from CO2 enters the earth's atmosphere - six billion tons are from human activity, approximately 90 billion tons come from biologic activity in earth's oceans and another 90 billion tons from such sources as volcanoes and decaying land plants
end partial quote from:

The Greatest Issue

My own personal experience with the effect of volcanoes on my personal life happened when Mt. Saint Helens blew up around 1980

1980 eruption of Mount St. Helens - Wikipedia,...
On May 18, 1980, a major volcanic eruption occurred at Mount St. Helens, a volcano located in the state of Washington, United States. The eruption (a VEI 5 event) was ...

USGS: Volcano Hazards Program CVO Mount St. Helens
1980 Cataclysmic Eruption. ... The landslide removed Mount St. Helens' northern flank, including part of the cryptodome that had grown inside the volcano.

When the Mountain erupted I think about 70 people died and people downwind for hundreds of miles got about 1 to 3 feet of ash in their towns to the east of Mt. Saint Helens. However, my land (2 1/2 acres of land was near Mt. Shasta and our weather there was also affected for 2 to 3 years noticeably.

The first reaction was that it got much colder in the winters. The second reaction was that there was more snow because it got colder so more rain turned to snow. The third thing we noticed was that sunsets were often Green and purple and orange instead of the more normal yellow and light orange sunsets. All these were atmospheric effects from the eruption which lasted at least 3 years after the eruption in Oregon.


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