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Old 08-28-2019, 04:28 PM   #6650 (permalink)
aerohead
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volcanoes

Quote:
Originally Posted by redpoint5 View Post
I recently learned that volcanoes emit an average of about 0.3 Gigatones of CO2 per year, and that would be considered dead CO2... which goes back to my point of calculating it rather than measuring. Either way, they should both roughly agree.

I just like perspective is all, which is why I enjoyed that graph I posted. A fact without context is meaningless.
Volcanologists have volcano observatories wherever active systems exist.And with remote-sensing,satellite-linked capabilities,it seems that they'd have a pretty good,full-spectrum inventory on emissions,as with drive-by automotive emissions surveys.
Of special interests to climatologists are sulfuric emissions which end up in the stratosphere,as with Mt Pinatubo,which erupted in 1991,cooling the planet for 4-years.
Volcanic CO2 would derive from the magma,which might originate from tectonically-subducted calcium carbonate,limestone rock,which would be ancient,coming back around.
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