KlimaCampus Kolloquium: Dynamical Climate Perturbations and the Fluctuation-Dissipation Theorem

Models indicate that much of the dynamical response of the atmosphere to imposed perturbations displays the same spatial patterns as those that dominate temporal fluctuations of the unperturbed climate. E.g., model responses to both increased GHGs and Antarctic ozone depletion show a poleward shift of the midlatitude jet in the southern hemisphere, with an anomaly pattern very much like that of the southern annular mode, the leading pattern of variability in southern hemisphere winds.

Such responses are reminiscent of the predictions of the fluctuation-dissipation theorem (FDT), which (amongst other things) relates the perturbed response of a dynamical system to its unperturbed variability. Applications of the FDT to climate problems have met with some success. I will describe some of these successes, as well as some failures and the possible limitations of the FDT.

Date

29.10.2015

Time

16:15 h

Place

Bundesstr. 53, room 022/023
Seminar Room 022/023, Ground Floor, Bundesstrasse 53, 20146 Hamburg, Hamburg

Speaker

Alan Plumb, MIT

Chair

Jochem Marotzke

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