Coarsening Dynamics of 2D Subaqueous Dunes
1 Introduction. Bedforms create self-organizing patterns, from wind-blown dunes on Earth and other planets (Lorenz & Zimbelman, 2014; Telfer et al., 2018) to ripples on riverbeds or beaches (Best, 1995).In industry, sedimenting particles can block pipes, while bedform formation can hinder multiphase particle-fluid transport in production lines …
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Setting the length and time scales of a cellular automaton …
[1] We present a new 3-D cellular automaton model for bed form dynamics in which individual physical processes such as erosion, deposition, and transport are implemented by nearest neighbor interactions and a time-dependent stochastic process. Simultaneously, a lattice gas cellular automaton model is used to compute the flow and …
Controls on and effects of armoring and vertical sorting in …
Then, using the dependency of the value on the threshold shear stress in the model (Figure 2c), we can derive the τ 1 value that should be used in the simulations …
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X. Gao, D. Zhang, O. Rozier, and C. Narteau. Abstract. In a real-space cellular automaton dune model, individual physical processes such as erosion, deposition and transport are …
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Earth Surface Processes and Landforms
An elementary cell is a real-space representation of the physical environment and pairs of nearest-neighbour cells are called doublets. Each individual physical process is associated with a set of doublet transitions and characteristic transition rates. Using a modular approach, we can simulate and combine a wide range of physical processes.
Earth Surface Processes and Landforms
Citing Literature. Earth Surface Processes and Landforms is a geomorphology journal investigating the impact of environmental change on Earth across …
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Transport capacity and saturation mechanism in a real-space cellular automaton dune model. X. Gao, D. Zhang, O. Rozier, and C. Narteau. Abstract. In a real-space cellular automaton dune model, individual physical processes such as erosion, deposition and transport are implemented by nearest neighbor interactions and a time-dependent …
Clement Narteau | Institut de Physique du Globe de Paris
Development and steady states of transverse dunes: A numerical analysis of dune pattern coarsening and giant dunes. by Clement Narteau. Publisher: Wiley-Blackwell. Publication Date: 2015. Publication Name: Journal of Geophysical Research: Earth Surface. Research Interests: Geology and Geophysical.
Common dependence on stress for the two fundamental …
1 Institut de Physique du Globe de Paris (UMR 7154, CNRS, Univ. P7), 4 Place Jussieu, 75252 Paris Cedex 05, France. [email protected]; PMID: …
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The oscillatory nature of the geomagnetic field during reversals
DOI: 10.1016/J.EPSL.2007.07.007 Corpus ID: 55258884; The oscillatory nature of the geomagnetic field during reversals @article{Narteau2007TheON, title={The oscillatory nature of the geomagnetic field during reversals}, author={Cl{'e}ment Narteau and Jean-L. Le Mou{"e}l and Jean‐Pierre Valet}, journal={Earth and Planetary Science …
Earthquake productivity law | Geophysical Journal …
It could be a consequence of the earthquake depth distribution, but also of other seismogenic properties such as creep, stress regime or heat flux (Narteau et al. 2009 ; Zaliapin & Ben-Zion 2016 ). In subduction zones along Japan, Kamchatka and New Zealand the Λ 2 -value decreases with the depth of the triggering events from 10 to 100 km (Figs ...
Mean sediment residence time in barchan dunes
C. Narteau. Institut de Physique du Globe de Paris UMR 7154, CNRS, Université Paris 7, Paris, France. Correspondence to: C. Narteau, [email protected] Search for more papers by this author. D. Zhang, D. Zhang. Chinese Academy of Sciences Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, …
A real-space cellular automaton laboratory
Olivier Rozier* and Clément Narteau Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot, UMR 7154 CNRS, Paris, France Received 15 January 2013; Revised 10 July ...
Elongation and Stability of a Linear Dune
For a volumetric flux at the source and a drift potential (Narteau et al., 2009), we found that the dune at steady state has a maximum width of 55 and a length of 1,175 (Figure 1c). This dune would then correspond on Earth to a 590-m-long linear dune with a maximum width of 27 m.
Incipient bedforms in a bidirectional wind regime
Abstract. Most terrestrial sand seas form at 'horse' latitudes, where the wind direction exhibits seasonal variation. Here, we extend the two-dimensional linear stability …
A real‐space cellular automaton laboratory
Clément Narteau. Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot, UMR 7154 CNRS, Paris, France. Search for more papers …
Morphodynamics of barchan and transverse dunes using a …
Narteau, C. ; Rozier, O. We analyze the morphodynamics of bedforms produced under unidirectional flow conditions by a lattice gas cellular automaton designed to study sediment transport. In this model, the same instability is responsible for the formation of dunes on flat sand beds and the initiation of superimposed bedforms on dune slopes.
Controls on and effects of armoring and vertical sorting in …
Then, using the dependency of the value on the threshold shear stress in the model (Figure 2c), we can derive the τ 1 value that should be used in the simulations from the mean wind speed in the field [Narteau et al., 2009]. Let us now consider granular mixtures with fine and coarse grains of diameters D f and D c, respectively.
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Temporal limits of the power law aftershock decay rate
[1] We compare the aftershock decay rate in natural data with predictions from a stochastic analytical model based on a Markov process with stationary transition rates. These transition rates vary according to the magnitude of a scalar representing the state of stress and defined as the overload. Thus, the aftershock decay rate in the model …
Elongation and stability of a linear dune
O. Rozier 1, C. Narteau, C. Gadal, P. Claudin2 and S. Courrech du Pont3 Key Points: • Linear dunes with a nger-like shape are identi ed as an elementary dune type. • The longitudinal mass balance governs the elongation and stability of a linear dune. • Dune morphodynamics is controlled by reversing winds and by the minimum dune size at ...
Gravity Changes Due to Large Earthquakes Detected in GRACE Satellite
Empirical orthogonal function (EOF) solves for the coherent spatiotemporal seismic signal due to an earthquake Seven largest earthquakes down to magnitude 8.3 have left unequivocal signatures in th...
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Two modes for dune orientation | Geology
These mechanisms drive the dune orientation. Therefore, dune alignment maximizes dune orthogonality to sand fluxes in the bed instability mode, while dunes are aligned with the mean sand transport direction in the fingering mode. Applied to Earth's deserts, the model quantitatively predicts the orientation of rectilinear dunes and their ...
Clement NARTEAU | Professor | Professor | Institut de …
I am currently a professor at the Institut de Physique du Globe de Paris and at the Université de Paris where I am investigating complex geophysical systems using discrete numerical models and ...