Volcanoes are a source of carbon dioxide, but their contribution to the global budgets of greenhouse gases is very small. On the time-scale of decades to centuries, greenhouse gas emissions from volcanic sources cause negligible climate change. It's because the gasses are spewed out in such a large concentration, all at one short point in time that it's effects are lowered. If all the active Volcanos in the world were to steadily release their gasses over the course of hundreds of years you WOULD see a net planetary increases in greenhouse gasses. As it is, it literally comes out in the wash.
[edit]So you can wrap your head around this concept. You have a pot of water. You also have an energy source. You could do one of two things to heat up the water. Either release all the energy at once at the water in a large flash of heat, or give it a steady heat of 100 degrees C for five minutes. Which heats the water better?[/edit]
A volcanic eruption has many effects, the sulfuric acid that this particular eruption created in the stratosphere blocked out sunlight. This led to a direct global surface cooling of 0.5 degrees C a year after the eruption. You can expect the cooling influence of a Volcano the size of Pinatubo to last almost a decade.
http://www.sciencedaily.com/releases...1128035329.htm
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Hogwash. Find research from real scientists, not environmentalists. 95% of meteorologists disagree that any warming is caused by humans. The world has been FAR hotter in the last 500 years than it is now. The mid 1800s were particularly hot.
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As to this. Show your hand. Show me a source of 95% of meterologists disagree that any warming is caused by humans. It is also funny that you say, in a thread started with an research project printed in the JOURNAL of SCIENCE, that you want research from real scientists. This leads me to believe you haven't bothered to read anything on here.
Woudl you classify the Pentagon as an Environmental Group?
Also feel free to quantify your claim that Mt. Pinatubo released 2000 times more greenhouse gases than humans have in their entire history. Please cite me how much in each gas Mt. Pinatubo released, and how much humans have in their history.
Finally "The world has been far hotter in the past 500 years than it is now." Um, What? Again source. Here' I'll spot you with this one.
20th Century warmest in 500 years.
Here's another one
A 500 year climate change record from bore-hole data
Wow, you're right, look at how high the last 500 years are compared to today!
*Hint, for everything you come back with (if you come back): Limbaugh letter does not count.