Volconvo Debate Forums - View Single Post

JohnMK · Oct 23, 2006, 07:20 pm

Hi Trigger,

Volcanic activity has a minor role to play at present. You say Mt. Pinatubo released more into the atmosphere than we could in 100 years . . . I don't doubt it released massive amounts of material in one form or another (mainly particulate, so it would result in slight global dimming->cooling), but it must not have been a globally significant amount of CO2. There are no single year "massive" increases in the 48 year record we have, just slow and steady increasing increases that mirrors periods of economic strength and weakness quite well, e.g. during the early '90's recession in much of the world you see the level of CO2 increase slow down. Still going up but a different slope on the curve.

The resolution of this particular Keeling curve graph below is quite low.

Here is a higher-resolution Keeling curve graph for those interested:
http://www.wooster.edu/geology/lackey/keeling.jpg

And here is the complete list of Keeling data, month by month, going back to 1958 in numeric tabular format:
http://cdiac.ornl.gov/ftp/ndp001/maunaloa.co2

Oct 23, 2006, 07:20 pm	#38 (permalink) (top)
JohnMK Laissez-Faire Location: Seattle Posts: 539	Hi Trigger, Volcanic activity has a minor role to play at present. You say Mt. Pinatubo released more into the atmosphere than we could in 100 years . . . I don't doubt it released massive amounts of material in one form or another (mainly particulate, so it would result in slight global dimming->cooling), but it must not have been a globally significant amount of CO2. There are no single year "massive" increases in the 48 year record we have, just slow and steady increasing increases that mirrors periods of economic strength and weakness quite well, e.g. during the early '90's recession in much of the world you see the level of CO2 increase slow down. Still going up but a different slope on the curve. The resolution of this particular Keeling curve graph below is quite low. Here is a higher-resolution Keeling curve graph for those interested: http://www.wooster.edu/geology/lackey/keeling.jpg And here is the complete list of Keeling data, month by month, going back to 1958 in numeric tabular format: http://cdiac.ornl.gov/ftp/ndp001/maunaloa.co2