PSU Mark
Eberly College of Science Mathematics Department

Meeting Details

For more information about this meeting, contact Tim Reluga, Andrew Belmonte, Mari Royer, Hope Shaffer.

Title:Processes Influencing Volume and Salt Fluxes through the Mouth of a Large Estuary
Seminar:The Pritchard Lab Seminar
Speaker:Michael Whitney, Dept of Marine Sciences, University of Connecticut
Tidal currents, buoyancy-driven flows fed by rivers, and wind-driven currents all can influence the exchange of volume and salt through estuary mouths. The Long Island Sound (LIS) is an example of a large estuary where all of the factors are important. A numerical modeling approach is used to study the dynamics of the tidal-averaged fluxes in the vicinity of the LIS mouth. The study uses the Regional Ocean Modeling System (ROMS), a hydrodynamic model that solves the equations of motion on a finite difference grid. The nonlinearities are essential for including steady flows generated by tides and representing the along-estuary momentum flow. Results indicate that tidal-averaged currents driven by tides are the same order of magnitude as buoyancy-driven currents. Pronounced interactions between the tides and the density field change the structure of the tidal-averaged currents. Wind events introduce weekly variability in the circulation by driving downwind jets along the coasts that flank a deeper upwind flow. These influences create circuitous and temporally variable exchange pathways through the mouth.

Room Reservation Information

Room Number:MB216
Date:12 / 07 / 2009
Time:02:30pm - 03:30pm