Talk by Petr Šácha

The next seminar “Modelling of materials – theory, model reduction and efficient numerical methods” will take place on Wednesday from 9:00 till 10:00 in the room K3. The talk will be given by Petr Šácha. Please see the details below.

Speaker: Petr Šácha
Title: Internal gravity waves in the Earth’s atmosphere and their representation and effects in climate models

Abstract: In the atmosphere, internal gravity waves (GWs) are an ubiquitous phenomenon influencing its dynamics and composition across layers.
In current generation chemistry-climate models (CCMs), GWs are usually smaller than the model resolution and their effects must be parameterized. However, many aspects of their effects remain poorly understood, constrained or are not parameterized in the models. This presentation will combine observational evidence, idealized modeling and dynamical analysis of a CCM output to study short-term and climate effects of parameterized GWs. Our results demonstrate the need for improved GW parameterizations as correct representation of GW effects is vital for reliable future climate projections.