Present-day CO2 emissions from volcanos
Article first published online: 19 OCT 2006
©1991. American Geophysical Union. All Rights Reserved.
Eos, Transactions American Geophysical Union
Volume 72, Issue 23, pages 249–255, 4 June 1991
How to Cite
1991), Present-day CO2 emissions from volcanos, Eos Trans. AGU, 72(23), 249–255, doi:10.1029/90EO10192.(
- Issue published online: 19 OCT 2006
- Article first published online: 19 OCT 2006
In an effort to better understand processes that control sources of CO2 in the carbon cycle, the U.S. Global Change Research Program [CEES, 1990] identifies imbonate deposition, and burial of organic matter would deplete the CO2 content of the atmosphere in 10,000 years and the atmosphere-ocean system in 500,000 years [Holland, 1978; Berner et al., 1983]. The CO2 content of the atmosphere-ocean system has varied in the past, but not at the rate expected if CO2 were removed and not replenished. It is assumed, therefore, that CO2 de gassing from the Earth's interior restores the deficit from surficial processes and balances the atmospheric CO2 budget on a time scale of 104–106yr. Earlier atmospheric balancing calculations imply present-day (pre-industrial) CO2 degassing rates of 6–7×1012 mol yr−1 [Holland, 1978; Berner et al., 1983]; recent calculations suggest degassing rates may be as high as 11×1012 mol yr−1 [Berner, 1990].