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Large-scale circulation classification, weather regimes, and local climate over France, the Alps and Western Europe
By applying the dynamical cluster algorithm to large-scale circulation patterns at vari- ous tropospheric levels (Z 700, Z500, and SLP (sea-level pressure)), we obtain the so-called weather regimes
Random changes of flow topology in two-dimensional and geophysical turbulence.
It is proved that bifurcations in the flow topology occur either by changing the domain shape, the nonlinearity of the vorticity-stream-function relation, or the energy for inertial flows.
Low-Frequency Variability in the Midlatitude Atmosphere Induced by an Oceanic Thermal Front
Abstract This study examines the flow induced in a highly idealized atmospheric model by an east–west-oriented oceanic thermal front. The model has a linear marine boundary layer coupled to a
Spontaneous Generation of Low-Frequency Modes of Variability in the Wind-Driven Ocean Circulation
In idealized models that aim to understand the temporal variability of the wind-driven ocean circulation, lowfrequency instabilities associated with so-called oscillatory gyre modes have been found.
Computing Transition Rates for the 1-D Stochastic Ginzburg–Landau–Allen–Cahn Equation for Finite-Amplitude Noise with a Rare Event Algorithm
In this article we compute and analyse the transition rates and duration of reactive trajectories of the stochastic 1-D Allen–Cahn equations for both the Freidlin–Wentzell regime (weak noise or
Atmospheric Circulations Induced by a Midlatitude SST Front: A GCM Study
The atmospheric effects of sea surface temperature (SST) anomalies over and near western boundary currents are a matter of renewed interest. The general circulation model (GCM) of the Laboratoire de
Quantization of the Low-Frequency Variability of the Double-Gyre Circulation
  • E. Simonnet
  • Environmental Science, Physics
  • 1 November 2005
Abstract The low-frequency dynamics of the double-gyre wind-driven circulation in large midlatitude oceanic basins is investigated. It is shown that for quasigeostrophic models linear (Rayleigh)
Rare Event Algorithm Links Transitions in Turbulent Flows with Activated Nucleations.
The adaptive multilevel splitting, a rare event algorithm, is used to get a very large statistics of transition paths, the extremely rare transitions from one state of the system to another, in a numerical simulation of genuine turbulent flows.