How Much Will the Planet Warm if Carbon Dioxide Levels Double?

Read the full story in the New York Times.

How much, exactly, will greenhouse gases heat the planet?

For more than 40 years, scientists have expressed the answer as a range of possible temperature increases, between 1.5 and 4.5 degrees Celsius, that will result from carbon dioxide levels doubling from preindustrial times. Now, a team of researchers has sharply narrowed the range of temperatures, tightening it to between 2.6 and 4.1 degrees Celsius.

Associated journal article: Sherwood, S., Webb, M. J., Annan, J. D., Armour, K. C., Forster, P. M., Hargreaves, J. C., et al. (2020). “An assessment of Earth’s climate sensitivity using multiple lines of evidence.” Reviews of Geophysics 58, e2019RG000678. https://doi.org/10.1029/2019RG000678

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