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SUMMARY:Noise\, Fluctuation\, and Response in Geophysical Fluid Dynamics -
  Lucarini\, V (Universitt Hamburg/University of Reading)
DTSTART:20131101T114500Z
DTEND:20131101T122000Z
UID:TALK48647@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:Response theory provides formidable methods for addressing man
 y problems in statistical mechanics. Recently\, it has been proposed as a 
 gateway for various challenges in geophysical fluid dynamics\, such as the
  provision of a rigorous conceptual framework for computing climate respon
 se to a variety of forcings and for deriving effective equations for coars
 e-grained variables\, thus paving the way for constructing accurate parame
 trization of unresolved processes in numerical models. In this contributio
 n\, we first would like to present some new results showing how one can us
 e response theory to compute the impact of adding stochastic forcing to de
 terministic chaotic systems. Then\, we will discuss the applicability of t
 he fluctuation-dissipation theorem in the context of non-equilibrium syste
 ms\, focusing on the role played by the choice of observable. Finally\, we
  will present some applications of response theory in geophysical fluid dy
 namical systems\, ranging from low-order models such as the Lorenz 63 and 
 Lorenz 96 models to General Circulation Models of the atmosphere.\n
LOCATION:Seminar Room 1\, Newton Institute
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