On Jan 14, 7:02*pm, "jim beam" sputnick wrote:
"jim beam" sputnick wrote in ...

Anyone know or have data sets with ----the average tonnage of all world
volcanic co2 emmisions per year ,graphed against total human co2
emmisions.For the last 100 years say.
I just thought it may make interesting reading.
Jim

Thanks to you all for trying to answer my serious question ,only Alastaire
has attempted an answer everyone else has skirted round the question.

* Anymore relevant answers would be appreciated ,as my son is doing an A
level geology module and he is also stuck trying to obtain relevant data in
answer to this question.(as above) he realises any data will have to be
intelligent guestimations .

It should be fairly easy to find some of the secondary summary data.
Suitable keywords "CO2 volcanic IPCC" into Google or Google Scholar or
ADS should get some results from the remote sensing folk.

Nows your chance uk.sci.weather group to participate in this years A
levels.....

Here is a quick one that at least gives some estimates and a rough
description of how they were obtained.

http://trs-new.jpl.nasa.gov/dspace/b.../1/04-0937.pdf

You have to draw your own graphs. I suspect if you go to the IPCC site
there is a suitable dataset.

BTW A level students should be doing their own project work.

Regards,
Martin Brown