Here ya go.

[link|http://www.nature.com/nature/journal/v351/n6325/pdf/351387a0.pdf|Nature] (subscription required).

Eruptive and diffuse emissions of CO2 from Mount Etna - P. Allard, et al., Nature 351 30 May 1991, p.387

[...]

According to these results, Etna is an important emitter of volcanic carbon dioxide. Although it makes up only 0.07% of the annual anthropogenic CO2 loading (2 x 10^4 Tg; ref 34), its CO2 discharge by sustained crater degassing (13 +/- 3 Tg/yr) is one order of magniture higher than the annual CO2 output from Kilauea 7,8 and actively degassing arc volcanoes 9,10 (Table 2). [...]

Yes, that's just one volcano, but Etna is a big contributor and it pales in contrast with the anthropogenic (man-made) CO2 contributions.

The HTML for the 150x link was busted. Here is the [link|http://volcano.und.nodak.edu/vwdocs/Gases/man.html|correct link]. The original paper (by Gerlach, also a paper on Etna in Nature) is [link|http://www.nature.com/nature/journal/v351/n6325/pdf/351352a0.pdf|here]:

Mount Etna emits CO2 gas at an astonishing rate - 25 million tons a year is the conservative estimate of Allard et al. on page 387 of this issues 1. This equals the output of four 1,000 MW coal-fired power stations. Active volcanoes on land typically pump out CO2 at rates more like 0.1 - 2 million tons a year [...]

HTH.

Cheers,
Scott.

Post #281,225 by Another Scott 4/10/07 11:59:50 AM Reply	Here ya go. [link\|http://www.nature.com/nature/journal/v351/n6325/pdf/351387a0.pdf\|Nature] (subscription required). Eruptive and diffuse emissions of CO2 from Mount Etna - P. Allard, et al., Nature 351 30 May 1991, p.387 [...] According to these results, Etna is an important emitter of volcanic carbon dioxide. Although it makes up only 0.07% of the annual anthropogenic CO2 loading (2 x 10^4 Tg; ref 34), its CO2 discharge by sustained crater degassing (13 +/- 3 Tg/yr) is one order of magniture higher than the annual CO2 output from Kilauea 7,8 and actively degassing arc volcanoes 9,10 (Table 2). [...] Yes, that's just one volcano, but Etna is a big contributor and it pales in contrast with the anthropogenic (man-made) CO2 contributions. The HTML for the 150x link was busted. Here is the [link\|http://volcano.und.nodak.edu/vwdocs/Gases/man.html\|correct link]. The original paper (by Gerlach, also a paper on Etna in Nature) is [link\|http://www.nature.com/nature/journal/v351/n6325/pdf/351352a0.pdf\|here]: Mount Etna emits CO2 gas at an astonishing rate - 25 million tons a year is the conservative estimate of Allard et al. on page 387 of this issues 1. This equals the output of four 1,000 MW coal-fired power stations. Active volcanoes on land typically pump out CO2 at rates more like 0.1 - 2 million tons a year [...] HTH. Cheers, Scott.
Post #281,229 by boxley 4/10/07 12:20:32 PM Reply	you did read it right? Annual Average Global Emissions of HCl, HF, and HBr, in Tg Source \t HCl HF HBr Volcanoesn 7.8 0.4 0.078 Oceans 300 0.02 1 Coal combustion \t 1.8 0.18 0.08 Petroleum combustion \t0.013 0.00036 Natural gas combustion .0022 natural gas plus petro plus coal doesnt equal 7.8 much less 150 times volcanos thanx, bill Any opinions expressed by me are mine alone, posted from my home computer, on my own time as a free american and do not reflect the opinions of any person or company that I have had professional relations with in the past 51 years. meep reach me at [link\|mailto:bill.oxley@cox.net\|mailto:bill.oxley@cox.net]
Post #281,231 by Another Scott 4/10/07 12:26:29 PM Reply	HCl is not CO2. Volcanoes pump a lot of stuff into the air - including hydrochloric acid (HCl), hydrofluoric acid (HF) and hydrogen bromide (HBr). They're not a major source of carbon dioxide in comparison of us burning stuff. The CO2 numbers are from the Nature papers I excerpted. Cheers, Scott.

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