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Palaeoclimate

Global warmth with little extra CO2

Most climate models consider only short-term processes such as cloud and sea-ice formation when assessing Earth's sensitivity to greenhouse-gas forcing. Mounting evidence indicates that the response could be stronger if boundary conditions change drastically.

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Figure 1: Envelopes of temperature change (ΔT) compared with preindustrial temperatures for different atmospheric carbon dioxide concentrations.

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Schneider, B., Schneider, R. Global warmth with little extra CO2. Nature Geosci 3, 6–7 (2010). https://doi.org/10.1038/ngeo736

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