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The goal of this activity is to help students better understand the nonintuitive concept of diffusion and introduce them to a variety of diffusion-related processes in the ocean. As part of this activ...
Numerical diffusion for flow-aligned unstructured grids with application to estuarine modeling
unstructured grid numerical diffusion grid generation grid alignment
2015/6/30
The benefits of unstructured grids in hydrodynamic models are well understood but in many cases lead to greater numerical diffusion compared with methods available on structured grids. The flexible na...
Importance of N2 fixation vs. nitrate eddy diffusion along a latitudinal transect in the Atlantic Ocean
the Atlantic Ocean nitrate eddy
2014/4/8
We present ocean, basin-scale simultaneous measurements of N2-fixation, nitrate diffusion, and primary
production along a south–north transect in the Atlantic Ocean crossing three biogeographic provi...
Experimental Determination of the Eddy Diffusion Coefficient Over the Open Ocean from Atmospheric Electric Measurements
Experimental Determination Eddy Diffusion Coefficient Atmospheric Electric Measurements
2009/4/3
The method of determining the eddy diffusivity over the open ocean either from profiles of the average electric filed or from average values of space charge and electric field measured near the sea su...
The Mediterranean Outflow—A Simple Advection-Diffusion Model
Mediterranean Outflow Advection-Diffusion Model
2009/3/24
The influence of the subtropical gyre on the spread of Mediterranean Water in the Atlantic is discussed in terms of a simple horizontal advection-diffusion model. The northern, southern and western bo...
Diffusion Coefficients Calculated from the Mediterranean Salinity Anomaly in the North Atlantic Ocean
Coefficients Calculated the North Atlantic Ocean Mediterranean Salinity Anomaly
2009/3/24
Vertical and horizontal austauch coefficients have been obtained from standard station data on the Mediterranean high-salinity tongue by use of a simple model including advection by a constant velocit...
Entrainment and Diffusion in a Gulf Stream Cyclonic Ring
Entrainment Diffusion Gulf Stream Cyclonic Ring
2009/3/24
The mixing and entrainment processes present in a cyclonic ring are investigated by means of a parametric model which is fitted to serial temperature data for a North Atlantic ring. The physical model...
Relative Diffusion as Related to Quasi-Periodic Current Structures
Quasi-Periodic Current Structures Lake Huron
2009/3/9
Experiments were performed in Lake Huron in which the relative diffusion of a dye plume and the lateral component of turbulent velocity were measured simultaneously. The standard deviation of the plum...
Diffusion Sublayer Thickness over Wind-Disturbed Water Surfaces
Diffusion Sublayer Thickness Wind-Disturbed Water Surfaces
2009/3/9
On the basis of wind-stress data, information has been calculated and published by Wu giving the mean viscous-sublayer thickness at sea as a function of wind velocity normalized to an anemometer heigh...
Experimental data were obtained in Lake Huron on the distribution of mean concentration and meansquare fluctuation about the center of gravity of a diffusing plume of fluorescent dye. Some of the mean...
Vertical Diffusion Driven by Internal Waves in a Sill Fjord
Vertical Diffusion Driven Internal Waves Sill Fjord
2009/3/7
A new mechanism, the breaking of internal waves, is proposed to explain vertical mixing within the lower layers of sill fjords. The generation of the waves at the sill of a fjord is modelled assuming ...
Horizontal Diffusion Characteristics in Lake Ontario
Horizontal Diffusion Characteristics Lake Ontario
2009/3/7
Experimental data on the diffusion of fluorescent dye patches were obtained in Lake Ontario, to study large-scale horizontal diffusion characteristics. In each experiment, a slug of water-soluble rhod...
Estimates of the Local Rate of Vertical Diffusion from Dissipation Measurements
Local Rate Dissipation Measurements Vertical Diffusion
2009/2/16
Scaling of the turbulent energy equation suggests the balance of terms in the ocean is between turbulent production, dissipation and the loss to buoyancy. In this paper two models for the source of oc...
Large-Scale Vertical Eddy Diffusion in the Main Pycnocline of the Central North Pacific
Large-Scale Vertical Central North Pacific Eddy Diffusion
2009/2/9
Indirect procedures are used to estimate the latitudinal distribution of the large-scale vertical eddy diffusivity coefficient in the main pycnocline from the interannual change in Tθ, ρθ structure of...
Effects of Variable and Anisotropic Diffusivities in a Steady-State Diffusion Model
Steady-State Diffusion Model Anisotropic Diffusivities Variable
2009/2/8
The hypothesis that variations in eddy diffusivity may account for some aspects of the observed distributions of oceanic scalars is examined by generating solutions to the diffusion equation with spat...