METHANE-RICH PROTEROZOIC ATMOSPHERE?
- DSpace Home
- →
- Геология России
- →
- ELibrary
- →
- View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.
dc.contributor.author | Pavlov A.A. | |
dc.contributor.author | Hurtgen M.T. | |
dc.contributor.author | Kasting Ja.F. | |
dc.contributor.author | Arthur M.A. | |
dc.date.accessioned | 2022-01-05T03:42:05Z | |
dc.date.available | 2022-01-05T03:42:05Z | |
dc.date.issued | 2003 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=7678420 | |
dc.identifier.citation | Geology, 2003, 31, 1, 87 | |
dc.identifier.issn | 0091-7613 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/34167 | |
dc.description.abstract | Methane mixing ratios of 100-300 ppm in the Proterozoic atmosphere (0.75-2.3 Ga) would have been sufficient to offset the climatic effects of the faint early sun and maintain the warm climate during those 1.5 b.y. The major argument against this type of the atmosphere is the short atmospheric oxidation time of methane after the first oxygenation event ca. 2.3 Ga. Here we argue that the net methane flux from the oxygen-poor Proterozoic ocean could have been 10-20 times higher than the present total biological methane flux. We demonstrate that increased methane production would have been sufficient to maintain methane concentrations at 100-300 ppm, which would keep the surface warm throughout the Proterozoic without invoking high CO2 levels (although the CO2 abundance could have been higher as well). A second oxygenation event at the end of the Proterozoic would have resulted in a decrease of methane flux and could have caused the first Neoproterozoic snowball glaciation. | |
dc.subject | methane abundance | |
dc.subject | atmospheric greenhouse | |
dc.subject | snowball Earth | |
dc.subject | Proterozoic climate | |
dc.subject | Neoproterozoic | |
dc.title | METHANE-RICH PROTEROZOIC ATMOSPHERE? | |
dc.type | Статья | |
dc.subject.age | Precambrian::Proterozoic::Neoproterozoic | |
dc.subject.age | Докембрий::Протерозой::Неопротерозойская | ru |
Files in this item
This item appears in the following Collection(s)
-
ELibrary
Метаданные публикаций с сайта https://www.elibrary.ru