Zobrazeno 1 - 10
of 74
pro vyhledávání: '"Mickaël D. Chekroun"'
Publikováno v:
Geophysical Research Letters, Vol 51, Iss 11, Pp n/a-n/a (2024)
Abstract Cloud organization impacts the radiative effects and precipitation patterns of the cloud field. Deviating from randomness, clouds exhibit either clustering or a regular grid structure, characterized by the spacing between clouds and the clou
Externí odkaz:
https://doaj.org/article/50c57c7f13c64dc087f1a33b22d1f7ae
Publikováno v:
Journal of Advances in Modeling Earth Systems, Vol 16, Iss 4, Pp n/a-n/a (2024)
Abstract We parameterize sub‐grid scale (SGS) fluxes in sinusoidally forced two‐dimensional turbulence on the β‐plane at high Reynolds numbers (Re ∼25,000) using simple 2‐layer convolutional neural networks (CNN) having only O(1000) parame
Externí odkaz:
https://doaj.org/article/183e4481bf1a4da9b738253d195d5477
Publikováno v:
Fluids, Vol 3, Iss 1, p 21 (2018)
The multiscale variability of the ocean circulation due to its nonlinear dynamics remains a big challenge for theoretical understanding and practical ocean modeling. This paper demonstrates how the data-adaptive harmonic (DAH) decomposition and inver
Externí odkaz:
https://doaj.org/article/acc50f994a234e2c8ae45ce7390e512e
Publikováno v:
Journal of Differential Equations. 346:145-204
A central challenge in physics is to describe non-equilibrium systems driven by randomness, such as a randomly growing interface, or fluids subject to random fluctuations that account e.g. for local stresses and heat fluxes not related to the velocit
Publikováno v:
Nonlinear Dynamics. 109:1887-1904
We consider a 2-layer quasi-geostrophic ocean model where the upper layer is forced by a steady Kolmogorov wind stress in a periodic channel domain, which allows to mathematically study the nonlinear development of the resulting flow. The model suppo
Publikováno v:
Science advances. 8(46)
Nonlinear time delay systems produce inherently delay-induced periodic oscillations, which are, however, too idealistic compared to observations. We exhibit a unified stochastic framework to systematically rectify such oscillations into oscillatory p
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 12261-12272 (2021)
Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
A subset of continental shallow convective cumulus (Cu) cloud fields has been shown to have distinct spatial properties and to form mostly over forests and vegetated areas, thus referred to as “green Cu” (Dror et al., 2020). Green Cu fields are k
Publikováno v:
Geophysical Research Letters. 49
One of the major sources of uncertainty in climate prediction results from the limitations in representing shallow cumulus (Cu) in models. Recently, a class of continental shallow convective Cu was shown to share distinct morphological properties and
Publikováno v:
Journal of Physical Oceanography. 50:3025-3041
Wave streaming is a near-bottom mean current induced by the bottom drag on surface gravity waves. Wave variations include the variations in wave heights, periods, and directions. Here we use numerical simulations to study the effects of wave streamin
Publikováno v:
Proceedings of the National Academy of Sciences of USA, vol 118, iss 48
Proceedings of the National Academy of Sciences of the United States of America
Proceedings of the National Academy of Sciences of the United States of America
Significance Slow–fast systems arise in many scientific applications, in particular in atmospheric and oceanic flows with fast inertia–gravity waves and slow geostrophic motions. When the slow and fast variables are strongly coupled—symptomatic