Results 61 to 70 of about 7,781 (181)

Searching for Universality of Turbulence in the Earth's Magnetosphere

Journal of Geophysical Research: Space Physics, Volume 130, Issue 10, October 2025.
Abstract Turbulence in space plasmas remains a fundamental challenge, and Earth's magnetosphere (MSP) offers a natural laboratory for its study. Using high‐resolution magnetic field data from the Magnetospheric Multiscale (MMS) mission, we extend a stochastic Markovian framework to analyze turbulence across 10 diverse magnetospheric regions, including ...
Dariusz Wójcik, Wiesław M. Macek
wiley   +1 more source

On channel capacity of FSO communication systems in anisotropic non-Kolmogorov strong turbulent atmosphere

Journal of the Optical Society of America A, 2019
Average channel capacity of free space optical (FSO) communication systems using a Gaussian beam with the intensity modulation and direct detection technique is investigated in anisotropic non-Kolmogorov strong turbulent atmosphere. The channel model is selected as gamma-gamma distribution, which is valid for strong turbulence.
openaire   +4 more sources

Direct measurements of anisotropic energy transfers in a rotating turbulence experiment

, 2011
We investigate experimentally the influence of a background rotation on the energy transfers in decaying grid turbulence. The anisotropic energy flux density, ${\bf F} ({\bf r}) = $, where $\delta {\bf u}$ is the vector velocity increment over separation
A. S. Monin, Cyril Lamriben, Frédéric Moisy, P. Sagaut, Pierre-Philippe Cortet, U. Frisch   +5 more
core   +1 more source

Experimental and Numerical Investigation on the Impact of Emergent Vegetation on the Hyporheic Exchange

Water Resources Research, Volume 61, Issue 10, October 2025.
Abstract Hyporheic exchange leads to the transfer of gases, solutes, and fine particles across the sediment‐water interface, playing a critical role in biogeochemical cycles and pollutant transport in aquatic environments. While in‐channel vegetation has been recognized to enhance hyporheic exchange, the mechanisms remain poorly understood.
S. H. Huang, R. Nuli, P. K. Kang, L. Shen, J. Q. Yang   +4 more
wiley   +1 more source

Local and nonlocal pressure Hessian effects in real and synthetic fluid turbulence

, 2011
The Lagrangian dynamics of the velocity gradient tensor A in isotropic and homogeneous turbulence depend on the joint action of the self-streching term and the pressure Hessian. Existing closures for pressure effects in terms of A are unable to reproduce
Carlos Rosales, Charles Meneveau, Emmanuel Lévêque, Francesco Taddia, Frisch U., Huidan Yu, Laurent Chevillard, Majda A., Tsinober A.   +8 more
core   +1 more source

Turbulence of Tropical Cyclones: From Peristrophic to Zonostrophic

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 14, 28 July 2025.
Abstract Cyclostrophic rotation in the core region of tropical cyclones (TCs) imprints a distinct signature upon their turbulence structure. Its intensity is characterized by the radius of maximum wind, Rmw ${R}_{mw}$, and the azimuthal wind velocity at that radius, Umax ${U}_{max}$.
Boris Galperin, Alexander K. Nickerson, Gregory P. King, Jun A. Zhang   +3 more
wiley   +1 more source

Impact of Wind‐Wave Coupling on Turbulence and Air‐Sea Fluxes: Insights From Direct Numerical Simulations

Geophysical Research Letters, Volume 52, Issue 14, 28 July 2025.
Abstract Accurate prediction of air‐sea fluxes hinges on a deep understanding of wind‐wave interactions, yet feedback mechanisms involving surface waves and wind are not fully understood. This paper investigates the effect of two‐way coupling between wind and waves on wind turbulence through direct numerical simulation of air‐water two‐phase flows ...
Jinlong Zhang, Weijian Liu, Yuhong Dong
wiley   +1 more source

Gravitational waves from stochastic relativistic sources: primordial turbulence and magnetic fields

, 2006
The power spectrum of a homogeneous and isotropic stochastic variable, characterized by a finite correlation length, does in general not vanish on scales larger than the correlation scale. If the variable is a divergence free vector field, we demonstrate
A. Linde, Chiara Caprini, J. O. Hinze, L. D. Landau, P. A. Davidson, Ruth Durrer, S. Weinberg   +6 more
core   +2 more sources

On the Surface Roughness Effects on −1 ${-}1$ Spectral Scaling in Atmospheric Boundary Layer

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 14, 28 July 2025.
Abstract Using field data from a coastal site, we explored the turbulence spectra of boundary layer flows over land and sea, focusing on the occurrence and characteristics of the −1 ${-}1$ spectral scaling in the energy production region. Results reveal that the interaction of the flow with surface roughness is a critical factor influencing the extent ...
Yuechao Wang, Yaswanth Sai Jetti, Shyuan Cheng, Bernardo Figueroa‐Espinoza, Leonardo P. Chamorro   +4 more
wiley   +1 more source

A Review of Green's Function Methods for Tracer Timescales and Pathways in Ocean Models

Journal of Advances in Modeling Earth Systems, Volume 17, Issue 7, July 2025.
Abstract Understanding advective‐diffusive dispersal of trace substances in environmental fluids like the global ocean is a ubiquitous challenge in geophysics. Since the turn of the millennium, substantial progress has been made in the theory, implementation in models, and application of such tracers in oceanography.
Thomas W. N. Haine, Stephen M. Griffies, Geoffrey Gebbie, Wenrui Jiang   +3 more
wiley   +1 more source