Carbon dioxide emissions from Deccan volcanism and a K/T boundary greenhouse effect

K. Caldeira, Michael Rampino

Research output: Contribution to journalArticle

Abstract

Total eruptive and noneruptive CO2 output by the Deccan eruptions (from 6 to 20 × 1016 moles) over a period of several hundred thousand years were estimated, based on best estimates of the CO2 weight fraction of the original basalts and basaltic melts, the fraction of CO2 degassed, and the volume of the Deccan Traps eruptions. Results of a model designed to estimate the effects of increased CO2 on climate and ocean chemistry suggest that increases in atmospheric pCO2 due to Deccan Traps CO2 emissions would have been <75ppm, leading to a predicted global warming of <1°C over several hundred thousand years. We conclude that the direct climate effects of CO2 emissions from the Deccan eruptions would have been too weak to be an important factor in the end-Cretaceous mass extinctions. -from Authors

Original languageEnglish (US)
Pages (from-to)1299-1302
Number of pages4
JournalGeophysical Research Letters
Volume17
Issue number9
StatePublished - 1990

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Cretaceous-Tertiary boundary
greenhouse effect
volcanic eruptions
carbon dioxide
Deccan Traps
volcanism
volcanic eruption
climate
traps
global warming
mass extinction
climate effect
estimates
basalt
oceans
extinction
melt
chemistry
Cretaceous
output

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)

Cite this

Carbon dioxide emissions from Deccan volcanism and a K/T boundary greenhouse effect. / Caldeira, K.; Rampino, Michael.

In: Geophysical Research Letters, Vol. 17, No. 9, 1990, p. 1299-1302.

Research output: Contribution to journalArticle

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