Predictability of midlatitude weather: Butterflies, error growth and AI models

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• Professor George Craig (LMU, Munich)
• Friday 20 September 2024, 15:30-16:30
• MR2, Centre for Mathematical Sciences, Wilberforce Road, Cambridge.

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Numerical weather forecasts have been improving steadily for 50 years, and this improvement has accelerated in the last two years through the application of machine learning to weather prediction. But predictability is believed to be intrinsically limited by the chaotic dynamics of the underlying equations of motion – the butterfly effect. This talk will briefly review the Lorenz theories of predictability, and present some recent research to determine more precisely how they apply to the atmosphere. With this knowledge we evaluate the performance of four recent AI weather models at the limit of predictability.

This talk is part of the DAMTP Atmosphere-Ocean Dynamics series.

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