Climate Change Editors' Highlights

New Technique to Estimate Climate Sensitivity

Climate sensitivity can be estimated using multiple variables jointly in a multi-component linear regression.

Source: Geophysical Research Letters


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Climate sensitivity is an important measure of how much the Earth’s climate warms as the amount of CO2 increases in the atmosphere. However, estimations of climate sensitivity have a wide uncertainty range. A recent review by Sherwood et al. [2020] discussed various lines of evidence to reduce the uncertainty of this measure and stressed the need for additional research on this topic.

Now Bastiaansen et al. [2021] propose a new technique to estimate climate sensitivity using multiple variables in a multicomponent linear regression model. They applied this novel technique to conceptual models, as well as CMIP models with millennia long simulations. They showed that the new method leads to better estimates for climate sensitivity, as well as the value of using multivariate metrics for climate sensitivity, instead of temperature only, as is traditionally done.

Citation: Bastiaansen, R., Dijkstra, H. A., & von der Heydt, A. S. [2021]. Multivariate estimations of equilibrium climate sensitivity from short transient warming simulations. Geophysical Research Letters, 48, e2020GL091090. https://doi.org/10.1029/2020GL091090

—Suzana Camargo, Editor, Geophysical Research Letters

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