Results 211 to 220 of about 2,111 (266)
Some of the next articles are maybe not open access.
Phytoplankton's motion in turbulent ocean
Physical Review E, 2015We study the influence of turbulence on upward motion of phytoplankton. Interaction with the flow is described by the Pedley-Kessler model considering spherical microorganisms. We find a range of parameters when the upward drift is only weakly perturbed or when turbulence completely randomizes the drift direction.
Itzhak, Fouxon, Alexander, Leshansky
openaire +2 more sources
2017
Ocean turbulence (and turbulence in general) tends to be tremendously intermittent, events often dominating average values. Or, put another way, the distribution of turbulence tends to be highly skewed, requiring significant systematic observations to capture the important dynamics that control time and space averages.
Emily L. Shroyer +3 more
openaire +1 more source
Ocean turbulence (and turbulence in general) tends to be tremendously intermittent, events often dominating average values. Or, put another way, the distribution of turbulence tends to be highly skewed, requiring significant systematic observations to capture the important dynamics that control time and space averages.
Emily L. Shroyer +3 more
openaire +1 more source
Journal of Physical Oceanography
Abstract Upper-ocean turbulence results from a complex set of interactions between submesoscale turbulence and local boundary layer processes. The interaction between larger-scale currents and turbulent fluctuations is two-way: large-scale shearing motions generate turbulence, and the resulting coherent turbulent fluxes of momentum and buoyancy feed ...
Peter P. Sullivan, James C. McWilliams
openaire +1 more source
Abstract Upper-ocean turbulence results from a complex set of interactions between submesoscale turbulence and local boundary layer processes. The interaction between larger-scale currents and turbulent fluctuations is two-way: large-scale shearing motions generate turbulence, and the resulting coherent turbulent fluxes of momentum and buoyancy feed ...
Peter P. Sullivan, James C. McWilliams
openaire +1 more source
Rogue waves in oceanic turbulence
Physica D: Nonlinear Phenomena, 2008A stochastic model of wave groups is presented to explain the occurrence of exceptionally large waves, usually referred to as rogue waves. The model leads to the description of the non-Gaussian statistics of large waves in oceanic turbulence and to a new asymptotic distribution of their crest heights in a form that generalizes the Tayfun model. The new
openaire +2 more sources
Turbulence modeling in ocean circulation problems
Izvestiya, Atmospheric and Oceanic Physics, 2014A physical formulation of the problem is considered. A mathematical model and a numerical algorithm of the turbulence model as part of the ocean circulation model for simulations for decades are formulated. The model is based on the evolution equations for turbulent kinetic energy (TKE) and the frequency of its viscous dissipation. A numerical solution
S. N. Moshonkin +3 more
openaire +1 more source
2011
In two experimental operations in deep water off the west coast of British Columbia, temperature and velocity microstructure have been recorded with a spatial resolution of 2 millimeters or better, from the thermocline down to a depth of 330 meters. Some measurements have been taken along horizontal paths at discrete depths, and, by superimposing a ...
openaire +1 more source
In two experimental operations in deep water off the west coast of British Columbia, temperature and velocity microstructure have been recorded with a spatial resolution of 2 millimeters or better, from the thermocline down to a depth of 330 meters. Some measurements have been taken along horizontal paths at discrete depths, and, by superimposing a ...
openaire +1 more source
Langmuir turbulence in the ocean
Journal of Fluid Mechanics, 1997Solutions are analysed from large-eddy simulations of the phase-averaged equations for oceanic currents in the surface planetary boundary layer (PBL), where the averaging is over high-frequency surface gravity waves. These equations have additional terms proportional to the Lagrangian Stokes drift of the waves, including vortex and ...
McWilliams, James C. +2 more
openaire +1 more source
1980
Abstract The variability of the ocean over a wide range of scales, from the megameter to the millimeter, is examined in the light of turbulence theory. The geophysical constraints which arise from the Earth's rotation and curvature and from the stratification are discussed with emphasis on the role they can play at different scales in inducing ...
openaire +1 more source
Abstract The variability of the ocean over a wide range of scales, from the megameter to the millimeter, is examined in the light of turbulence theory. The geophysical constraints which arise from the Earth's rotation and curvature and from the stratification are discussed with emphasis on the role they can play at different scales in inducing ...
openaire +1 more source
Billow turbulence and ocean microstructure
Deep Sea Research and Oceanographic Abstracts, 1972Abstract Experiments in which the authors studied the motion of dye tracers underwater have shown that vertical mixing in the Mediterranean thermocline is effected primarily by billow turbulence occurring on the interfaces between thin extensive layers.
J.D. Woods, R.L. Wiley
openaire +1 more source
Light scintillation in oceanic turbulence
Waves in Random and Complex Media, 2012The scintillation index of plane and spherical light waves as well as of a Gaussian beam, propagating in the clear-water weakly turbulent ocean, is revealed. The results are of utmost importance for underwater optical communications and sensing. An analysis of the threshold between the weak and strong regimes of oceanic turbulence is made, with the ...
O. Korotkova, N. Farwell, E. Shchepakina
openaire +1 more source