Durski, S. M. Rutgers University, sdurski@ahab.rutgers.edu
Haidvogel, D. M. Rutgers University, dale@ahab.rutgers.edu
Chant, R. Rutgers University, chant@ahab.rutgers.edu

 
COASTAL UPWELLING ON A SHALLOW SHELF WITH TOPOGRAPHIC BUMPS
 
Upwelling dynamics have been extensively studied along the eastern margins of continents. In these regions the continental shelf typically drops off rather quickly. Consequently surface and bottom boundary layers are well seperated and the bottom bathymetry plays a role primarily in determing the circulation beneath the pycnocline. Here we discuss a 3-dimensional numerical model study of the dynamics of upwelling circulation on a shallow shelf with topographic ridges extending perpendicular to the coastline. The domain is designed as an idealization of the New Jersey coastal region. The 2-dimensional circulation differs notably from the 'traditional' west coast upwelling commonly studied. The topographic bumps are found to significantly alter the circulation in an area roughly comparable to their length scale. The potential for onshore transport of near-bottom water is significantly enhanced in the region immeadiately downstream of the coastal bumps. This promotes the idea that these regions may be particularly significant in terms of phytoplankton productivity and laval transport. The modeling results of this study are used to interpret observations obtained during the NOPP 1998 summer field experiment.
 
Day: Friday, Feb. 5
Time: 10:30 - 10:45am
Location: Hilton of Santa Fe
 
Code: SS12FR1030H