A 485-million-year history of Earth’s surface temperature
Judd, E.J.; Tierney, J.E.; Lunt, D.J.; Montañez, I.P.; Huber, B.T.; Wing, S.L.; Valdes, P.J. (2024). A 485-million-year history of Earth’s surface temperature. Science (Wash.) 385(6715): eadk3705. https://dx.doi.org/10.1126/science.adk3705
In: Science (Washington). American Association for the Advancement of Science: New York, N.Y. ISSN 0036-8075; e-ISSN 1095-9203, meer
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| Auteurs | | Top |
- Judd, E.J.
- Tierney, J.E.
- Lunt, D.J.
- Montañez, I.P.
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- Huber, B.T.
- Wing, S.L.
- Valdes, P.J.
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| Abstract |
A long-term record of global mean surface temperature (GMST) provides critical insight into the
dynamical limits of Earth’s climate and the complex feedbacks between temperature and the
broader Earth system. Here, we present PhanDA, a reconstruction of GMST over the past 485 million
years, generated by statistically integrating proxy data with climate model simulations. PhanDA
exhibits a large range of GMST, spanning 11° to 36°C. Partitioning the reconstruction into climate
states indicates that more time was spent in warmer rather than colder climates and reveals
consistent latitudinal temperature gradients within each state. There is a strong correlation between
atmospheric carbon dioxide (CO2) concentrations and GMST, identifying CO2 as the dominant control on variations in Phanerozoic global climate and suggesting an apparent Earth system sensitivity of ~8°C. |
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