ELFT HÍRADÓ

[StatFizSzeminar <statfiz AT glu.elte.hu>]

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           ELTE TTK Fizikai Intézet
       STATISZTIKUS FIZIKAI SZEMINÁRIUM


             2020. február 12.

                   szerda 

                   11.00

               Stefano Pierini
        University of Naples Parthenope

 "Applications of dynamical systems theory to 
            excitable ocean systems" 

In this seminar, several applications of dynamical
systems theory to two nonlinear ocean systems are 
presented and discussed. The first system (SWM)
is based on the shallow water equations of 
geophysical fluid dynamics, while the second (LOM) 
is based on a low-order (four-dimensional) spectral
quasigeostrophic model. Despite their profound 
difference, both models are excitable, yielding 
relaxation oscillations that can be either excitable 
or self-sustained depending on the parameter range 
considered. The corresponding phenomenology shares,
therefore, important similarities with the abrupt 
changes observed in the climate system. The seminar 
is divided into two parts. In the first part, aspects
of ocean dynamics are investigated in the framework
of both autonomous and nonautonomous dynamical systems
theory; in the latter case, particular attention is 
devoted to the concept of snapshot/pullback attractor.
In the second part, some analyses of deterministic 
and stochastic tipping points arising in nonautonomous
versions of LOM are discussed. 



1117, Budapest, Pázmány P. sétány 1/A, Északi tömb 2.54
        honlap: http://glu.elte.hu/~statfiz

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