E. Simonnet

Publications40
h-index20
Citations1,426
Highly Influential Citations75
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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…
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Random changes of flow topology in two-dimensional and geophysical turbulence.
TLDR
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.
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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…
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Stochastic climate dynamics: Random attractors and time-dependent invariant measures
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Climate dynamics and fluid mechanics: Natural variability and related uncertainties
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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.…
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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…
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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…
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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)…
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Rare Event Algorithm Links Transitions in Turbulent Flows with Activated Nucleations.
TLDR
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.
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