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Properties of the atmospheric response to tropical heating estimated from the fluctuation dissipation theorem

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Mathematical and Statistical Approaches to Climate Modelling and Prediction

Recent studies have demonstrated the applicability of the Fluctuation Dissipation Theorem to atmospheric response problems in which the external stimulus is a function of space but is constant in time. These investigations have made clear the utility of the resulting response operators for addressing questions concerning optimal response, climate control, attribution and physical mechanisms. In this presentation we explore the usefulness of the FDT methodology for response problems in which the imposed forcing is a function of time.

In our study we concentrate on the effects of time varying tropical heating. First we valid operators designed to match the solutions of AGC Ms. Next we use the operators to systematically explore how the tropical and midlatitude response depends on attributes of the tropical heating including its position, structure and movement. Not only are operators for the response of mean state variables considered but also operators that give the response of functionals of the state, including eddy variance and fluxes associated with the storm tracks.

This talk is part of the Isaac Newton Institute Seminar Series series.

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