Abstract
Times modern amounts, respectively. The greenhouse gas concentrations were sufficient to offset a fainter Sun. Climate moderation by the carbon cycle suggests average surface temperatures between 0° and 40°C, consistent with occasional glaciations. Isotopic mass fractionation of atmospheric xenon through the Archean until atmospheric oxygenation is best explained by drag of xenon ions by hydrogen escaping rapidly into space. These data imply that substantial loss of hydrogen oxidized the Earth. Despite these advances, detailed understanding of the coevolving solid Earth, biosphere, and atmosphere remains elusive, however.
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2Topics & keywords
Topics
Keywords
- Archean
- Atmosphere (unit)
- Astrobiology
- Earth science
- Geology
- Geography
- Biology
- Geochemistry
UN Sustainable Development Goals
- Climate action
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