Distinguishing ichthyogenic turbulence from geophysical turbulence

Geophysical Turbulence Geophysical Turbulence

Predictability in a Model of Geophysical Turbulence

The nature of predictability is examined in a numerical model relevant to the midlatitude atmosphere and oceans. The approach followed is novel and uses new theoretical tools from information theory, namely entropy functionals, as measures of information content and their application to finite ensembles. Particular attention is paid here to the practical application of these methods to the prob...

Efficient stochastic superparameterization for geophysical turbulence.

Efficient computation of geophysical turbulence, such as occurs in the atmosphere and ocean, is a formidable challenge for the following reasons: the complex combination of waves, jets, and vortices; significant energetic backscatter from unresolved small scales to resolved large scales; a lack of dynamical scale separation between large and small scales; and small-scale instabilities, conditio...

New perspectives on superparameterization for geophysical turbulence

This is a research expository paper regarding superparameterization, a class of multi-scale numerical methods designed to cope with the intermittent multi-scale effects of inhomogeneous geophysical turbulence where energy often inverse-cascades from the unresolved scales to the large scales through the effects of waves, jets, vortices, and latent heat release from moist processes. Original as w...

On a possible mechanism of anomalous diffusion in geophysical turbulence

The main characteristic features of the geophysical turbulence are differential (so called ,8-effect) rotation and stratification. Each of these phenomena is responsible for a specific type of waves: planetary or Rossby waves and internal gravity waves, respectively. It is well-known that e.g. for the ,8plane turbulence [1] one may have vortex-dominated (Le. close to the 2d turbulence), wave-do...