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Ancient CO2 Levels Reveal Arctic Climate Secrets

3/19/2026

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Story summary
  • Pliocene climate research shows atmospheric CO2 levels influenced Arctic conditions, with orbital forcing and sea ice albedo shaping climate sensitivity.
  • The work also traces seawater chemistry evolution and its role in climate regulation, linking chemical changes to broader climate dynamics.
  • High-resolution CO2 records from the Plio-Pleistocene era reveal how climate responded to radiative forcing and help explain long-term patterns.