EGU General Assembly 2008
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  Information - AS1.11 Recent developments in Geophysical Fluid Dynamics

Event Information
Geophysical Fluid Dynamics (GFD) is dealing with various aspects of the mathematical descriptions of rotating stratified fluids starting from the physical laws of hydro-thermo-dynamics. Historically, Physicists and Mathematicians originating from various disciplines developed physical and numerical models with increasing complexity, adding to our fundamental understanding of such flows and thereby unifying these fields. Today GFD is a truly interdisciplinary field of its own, which encompasses multiscale flows of planetary atmospheres and oceans, their weather and climate, and the motions of 'the solid Earth'.

In this session we invite contributions expanding our understanding of the complex behaviour of geophysical flows, presenting novel techniques that either facilitate a deeper understanding or improve the efficacy of numerical procedures involved, and/or reviewing major advances in a particular aspect of geophysical fluid dynamics. The interdisciplinary character of dynamical and computational aspects of this session encourages an exchange of ideas and contributions across various fields, such as meteorology, oceanography, astrophysics, geological fluid dynamics, applied mathematics, and computational fluid dynamics with applications to ocean and atmosphere.

Some descriptions and its numerical procedures emphasise an underlying balanced flow or pure Hamiltonian flows, some investigate phenomena playing a decisive role like wave motions, dissipative processes or different types of boundaries, which e.g. may affect the wake of the flow by exciting inertia-gravity waves. Due to increasing computing power there is a trend to develop numerical models of high complexity with increasing range of spatial and temporal scales resolved.

In 1948 Jule Charney established the scale analysis as an essential method in GFD in his pioneering work "On the Scale of Atmospheric Motions". One year later, Alexander Obukhov, born exactly 90 years ago, published his seminal paper "On the Question of the Geostrophic Wind", and in 1958 A.P.Burger contributed his "Scale Consideration of Planetary Motions of the Atmosphere". Now sixty years later, where global models are in reach of resolving simultaneously large- and mesoscale phenomena, research focuses on scale interactions, and the appropriate underlying equations, that allow multi-scale simulations while retaining the essential features of atmospheric and oceanic flows.
Hence, in retrospection of sixty years of scale analysis we particularly invite contributions to GFD from this perspective.

Preliminary List of Solicited Speakers
Akio Arakawa, UCLA, USA
Michael Kurgansky, Univ.Conception, Chile
Piotr Smolarkiewicz, NCAR, USA


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