A Model for Gravity Waves in a Moist Atmosphere
Decanato - Facoltà di scienze informatiche
Data d'inizio: 21 Gennaio 2010
Data di fine: 22 Gennaio 2010
The Faculty of Informatics is pleased to announce a seminar given by Daniel Ruprecht
DATE: Thursday, January 21st, 2010
PLACE: USI Università della Svizzera italiana, room SI-008, Informatics building (Via G. Buffi 13)
The talk will present the derivation of a reduced model for the propagation of internal gravity waves in the atmosphere, affected by moist micro-physics. A brief summary of the mechanics of internal waves is provided in the first part of the talk. In the second part, the actual derivation of the model is presented. Starting from the conservation laws for mass, momentum and energy, combined with a bulk micro-physics scheme, the model is derived employing multiscale asymptotic techniques. The resulting equations are an extension of a well-known meteorological model for gravity waves in a dry atmosphere.
The employed ansatz allows for an analytically computed closure of the obtained leading order system and does not require additional assumptions besides adopting a particular asymptotic limit regime.
Daniel Ruprecht is a PhD student in the Geophysical Fluid Dynamics working group of Prof. Rupert Klein. He's active in the study and development of new models for meteorology.
HOST: Prof. Rolf Krause