Faint young Sun problem more severe due to ice-albedo feedback and higher rotation rate of the early Earth
was up to 25 % less luminous than today, yet there is strong evidence that the Earth’s ocean surface was not completely frozen. The most obvious solutions to this ‘faint young Sun problem ’ demand high concentrations of greenhouse gases such as carbon dioxide. Here we present the first comprehensive...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.433.4480 2023-05-15T18:18:16+02:00 Faint young Sun problem more severe due to ice-albedo feedback and higher rotation rate of the early Earth Hendrik Kienert Georg Feulner Vladimir Petoukhov Archean Citation Kienert G. Feulner V. Petoukhov The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.433.4480 http://www.leif.org/EOS/2012GL054381.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.433.4480 http://www.leif.org/EOS/2012GL054381.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.leif.org/EOS/2012GL054381.pdf text ftciteseerx 2016-01-08T04:48:37Z was up to 25 % less luminous than today, yet there is strong evidence that the Earth’s ocean surface was not completely frozen. The most obvious solutions to this ‘faint young Sun problem ’ demand high concentrations of greenhouse gases such as carbon dioxide. Here we present the first comprehensive 3-dimensional simulations of the Archean climate that include processes as the sea-ice albedo feedback and the higher rotation rate of the Earth. These effects lead to CO2 partial pressures required to prevent the Earth from freezing that are significantly higher than previously thought. For the early Archean, we find a critical CO2 partial pressure of 0.4 bar in contrast to 0.06 bar estimated in previous studies with 1-dimensional radiative-convective models. Our results suggest that currently favored greenhouse solutions could be in conflict with constraints emerging for the middle and late Text Sea ice Unknown |
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was up to 25 % less luminous than today, yet there is strong evidence that the Earth’s ocean surface was not completely frozen. The most obvious solutions to this ‘faint young Sun problem ’ demand high concentrations of greenhouse gases such as carbon dioxide. Here we present the first comprehensive 3-dimensional simulations of the Archean climate that include processes as the sea-ice albedo feedback and the higher rotation rate of the Earth. These effects lead to CO2 partial pressures required to prevent the Earth from freezing that are significantly higher than previously thought. For the early Archean, we find a critical CO2 partial pressure of 0.4 bar in contrast to 0.06 bar estimated in previous studies with 1-dimensional radiative-convective models. Our results suggest that currently favored greenhouse solutions could be in conflict with constraints emerging for the middle and late |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Hendrik Kienert Georg Feulner Vladimir Petoukhov Archean Citation Kienert G. Feulner V. Petoukhov |
spellingShingle |
Hendrik Kienert Georg Feulner Vladimir Petoukhov Archean Citation Kienert G. Feulner V. Petoukhov Faint young Sun problem more severe due to ice-albedo feedback and higher rotation rate of the early Earth |
author_facet |
Hendrik Kienert Georg Feulner Vladimir Petoukhov Archean Citation Kienert G. Feulner V. Petoukhov |
author_sort |
Hendrik Kienert |
title |
Faint young Sun problem more severe due to ice-albedo feedback and higher rotation rate of the early Earth |
title_short |
Faint young Sun problem more severe due to ice-albedo feedback and higher rotation rate of the early Earth |
title_full |
Faint young Sun problem more severe due to ice-albedo feedback and higher rotation rate of the early Earth |
title_fullStr |
Faint young Sun problem more severe due to ice-albedo feedback and higher rotation rate of the early Earth |
title_full_unstemmed |
Faint young Sun problem more severe due to ice-albedo feedback and higher rotation rate of the early Earth |
title_sort |
faint young sun problem more severe due to ice-albedo feedback and higher rotation rate of the early earth |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.433.4480 http://www.leif.org/EOS/2012GL054381.pdf |
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Sea ice |
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Sea ice |
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http://www.leif.org/EOS/2012GL054381.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.433.4480 http://www.leif.org/EOS/2012GL054381.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766194789564284928 |