Defining metrics of the Quasi-Biennial oscillation in global climate models

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As the dominant mode of variability in the tropical stratosphere, the Quasi-Biennial Oscillation (QBO) has been subject to extensive research. Though there is a well-developed theory of this phenomenon being forced by wave-mean flow interaction, simulating the QBO adequately in global climate models still remains difficult. This paper presents a set of metrics to characterize the morphology of the QBO using a number of different reanalysis datasets and the FU Berlin radiosonde observation dataset. The same metrics are then calculated from Coupled Model Intercomparison Project 5 and Chemistry-Climate Model Validation Activity 2 simulations which included a representation of QBO-like behaviour to evaluate which aspects of the QBO are well captured by the models and which ones remain a challenge for future model development.




Schenzinger, V., Osprey, S., Gray, L., & Butchart, N. (2017). Defining metrics of the Quasi-Biennial oscillation in global climate models. Geoscientific Model Development, 10(6), 2157–2168.

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