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Prof. Nedjeljka Žagar: Atmospheric energy spectra and traditional approximations

Date: 9. 5. 2017
Source: Monday physics colloquium
Ponedeljek, 15. maj 2017, ob 16:15 v predavalnici F1, FMF UL, Jadranska 19, Ljubljana

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Povzetek:

Atmospheric energy spectra and traditional approximations

Prof. Nedjeljka Žagar

Faculty of Mathematics and Physics, University of Ljubljana

Much of our understanding of atmospheric dynamics comes from considering the linearized versions of the 3-dimensional equations for the conservation of atmospheric momentum, energy and mass. Eigensolutions of the linearized equations separate the circulation in two kinds of oscillations, the quasi-geostrophic waves and the inertia-gravity waves. Energetics in the two regimes has traditionally been discussed by using different sets of simplified 2-dimensional equations. I will discuss traditional assumptions used to derive simplified equations and present a 3-dimensional picture of the global atmospheric energy spectrum.