IMFUFA-seminar: Emergence of multiplicity of time scales in the modeling of climate, matter, life, and economy

Meet Ulf R Pedersen and Bernhelm Booß-Bavnbek (RUC) who will talk about emergence of multiplicity of time scales in the modeling of climate, matter, life, and economy
Start:kl. 13.00
Slut:kl. 15.00
Sted: Roskilde Universitet, Bygning 27.1, lokale 1

Transforming for sustainability and mitigating climate change hazards depends decisively on the broad support of an informed public. Greenhouse gases accumulate rapidly in the atmosphere with immediate changes in the radiation pattern while secondary effects develop slowly like the release of methane from the oceans and perm freezing areas and, in the opposite direction, the binding and storage of CO2 in the oceans. Such huge differences between characteristic time lengths provide not only difficulties in mathematical modelling, statistical sampling, and numerical simulation but also in communicating threats and solutions to the public. We discuss the universality of multiple characteristic times in modelling matter, life and economy by taking a closer look at examples: viscosity of soft materials; biphasic insulin secretion of pancreatic beta cells; and long- and short-term cycles in macro-economics. To make people familiar with the counterintuitive effects of two characteristic times, we provide simple mathe-matical models of intricate systems with two characteristic times: a simple system of coupled ordinary differential equations and a simple slow-fast system in complex polynomial dynamics. We draw conclusions for scientific, communicative and political challenges.

Seminaret foregår på engelsk.



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