Roman, M. R.. University of Maryland, Horn Point Laboratory, roman@hpl.umces.edu
Lascara, C. R.. Center for Physical Oceanography, lascara@ccpo.odu.edu
Boicourt, W. University of Maryland, Horn Point Laboratory, boicourt@hpl.umces.edu
Valle-Levinson, A. Center for Physical Oceanography, arnoldo@ccpo.odu.edu
Burgett, R. Center for Physical Oceanography, burgett@ccpo.odu.edu
Zhang, . University of Maryland, zhang@umces.hpl.edu

 
PLANKTON AGGREGATIONS ASSOCIATED WITH FRONTAL CONVERGENCES AT THE ENTRANCE OF CHESAPEAKE BAY
 
As part of the NSF Land Margin Ecosystem Research Program, TIES (Trophic Interactions in Estuarine Systems), we are studying the role of spatial and temporal physical discontinuities in enhancing zooplankton and fish production in Chesapeake Bay. Topographic and lateral fronts are examples of such physical features which serve to concentrate plankton and enhance secondary production. We conducted time-series transects over multiple tidal cycles across the entrance of Chesapeake Bay with an undulating towed vehicle - the SCANFISH equipped with multiple sensors, including an Optical Plankton Counter, and a towed Doppler velocity profiler. The interaction of tides and topography resulted in convergence zones which contained enhanced concentrations of phytoplankton and zooplankton. These convergence zones persisted for several hours each day and had horizontal scales on the order of 100 to 500 m. The predictability and regular occurrence of these convergence zones, and their associated fronts likely serves to enhance the regional productivity of the lower Chesapeake Bay.
 
Day: Thursday, Feb. 4
Time: 08:45 - 09:00am
Location: Hilton of Santa Fe
 
Code: SS04TH0845H