SEDIS - Publications
Schmidt, Gavin A. and Shindell, Drew T. (2003): Atmospheric composition, radiative forcing, and climate change as a consequence of a massive methane release from gas hydrates
ODP 171B 1051
ODP 113 690
ODP 143 865
Schmidt, Gavin A.
NASA, Goddard Institute for Space Studies, New York, NY, United States
Shindell, Drew T.
Atmospheric composition, radiative forcing, and climate change as a consequence of a massive methane release from gas hydrates
American Geophysical Union, Washington, DC, United States
The massive perturbation to global climate and the carbon cycle during the Paleocene/Eocene Thermal Maximum (PETM) may have been forced by a catastrophic release of methane gas (CH (sub 4) ) from hydrate deposits on the continental slope. We investigate whether reported PETM paleotemperature and paleo-CO (sub 2) proxies are consistent with this hypothesis by considering the impact of large increases in CH (sub 4) emissions to the atmosphere. Significant effects on atmospheric chemistry and CH (sub 4) lifetime are seen for a range of plausible emission rates. (modified journ. abstr.)
Stratigraphy; aliphatic hydrocarbons; alkanes; Atlantic Ocean; atmosphere; Cenozoic; climate change; cores; Eocene; Foraminifera; gas hydrates; general circulation models; hydrocarbons; Invertebrata; Leg 113; Leg 143; Leg 171B; lower Eocene; methane; microfossils; numerical models; Ocean Drilling Program; ODP Site 1051; ODP Site 690; ODP Site 865; organic compounds; Pacific Ocean; paleo-oceanography; Paleocene; paleoclimatology; paleoenvironment; Paleogene; paleotemperature; Protista; Southern Ocean; Tertiary; upper Paleocene;
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