Uncertainty estimation in weather and climate

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Uncertainty estimation in weather and climate
Venerdì 11 dicembre alle ore 15:00, Roberto Buizza dell’Istituto Scienze della Vita - Scuola Universitaria Superiore Sant’Anna, terrà il Colloquio di Fisica dal titolo "Uncertainty estimation in weather and climate".

One of the major advances in weather prediction of the past three decades has been the provision of reliable uncertainty estimations. This has been achieved by shifting from issuing a single to an ensemble of forecasts. This paradigm shift allows us not only to forecast of the most likely future state, but also to have reliable estimates of its accuracy, for example expressed in terms of a range of possible future scenario, or in probabilities. Similarly, today we have ensembles of analyses and reanalyses, that allows us to estimate the full probability distribution function of current and past states. In this talk, I will review how we developed the earlier ensembles, and the key characteristics of today’s operational ensembles. I will also discuss how work is progressing towards the development of more reliable, coupled Earth-system ensembles of data assimilations and forecasts, which should help us further advancing forecast skill.
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