Science Seminars

3/14/2013 Seminar

Speaker: Lev Maslov
Date: Thursday, Mar 14, 2013
Time: 4:00 PM
Location: SPSC W120

Seminar Abstract:

The global, long-term temperature variations curve constructed  from Antarctica ice-core project data is decomposed  into two parts: the “auto-oscillation” part and the “convective” part. These two parts represent two different but tightly interconnected processes and, correspondingly, two different types of self-organization of the Earth’s climate system. The self-organization in the “auto-oscillation” component is the non-linear reaction of the Earth’s climate system, as a whole, to the input of solar radiation. The self-organization in the “convective” component is the self-organized nonlinear critical process taking energy from and fluctuating around the auto-oscillating component of the temperature variations. The Lotka-Volterra type system of ODE is written to model the auto-oscillating part of the global temperature variation, and the multifractal spectrum of the convective part of the global temperature variation is calculated. It is shown that the Earth’s climate can be characterized as an open, nonlinear, dissipative, self-organized dynamic system with two levels of self-organization.