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Re: [Phys-L] [Phys-l] Poll shows fewer Americans "believe" in global warming

On 2012, Oct 26, , at 19:56, brian whatcott wrote:

Though the orifice be large, if the duty factor be low - and it is - then Fermi does not stand unchallenged

Brian W

but material injected into the stratosphere is much more slowly dispersed, in the absence of weather systems. Substantial amounts of stratospheric injection can have global effects: after Mount Pinatubo erupted in 1991, global temperatures dropped by about 0.5°C. The largest eruptions are thought to cause drops of up to several degrees, and are potentially the cause of some of the known mass extinctions.

The climactic eruption of Mount Pinatubo on June 15, 1991, was one of the largest eruptions of the twentieth century and injected a 20-million ton *** (metric scale) sulfur dioxide cloud into the stratosphere at an altitude of more than 20 miles. The Pinatubo cloud was the largest sulfur dioxide cloud ever observed in the stratosphere since the beginning of such observations by satellites in 1978. It caused what is believed to be the largest aerosol disturbance of the stratosphere in the twentieth century, though probably smaller than the disturbances from eruptions of Krakatau in 1883 and Tambora in 1815. Consequently, it was a standout in its climate impact and cooled the Earth's surface for three years following the eruption, by as much as 1.3 degrees at the height of the impact. Sulfur dioxide from the large 1783-1784 Laki fissure eruption in Iceland caused regional cooling of Europe and North America by similar amounts for similar periods of time.

*** World production in 2004 was about 180 million tonnes, (Sulphuric acid)

So plenty available -- prob. is getting it into the stratosphere.

Sulfuric acid - Wikipedia, the free encyclopedia

bc thinks now bicarb. to neutralize the acid rain.