Report of the
U.S. GLOBEC Georges Bank
18 - 20 November 2003, Rhode Island
|Cover Page Acknowledgements Introduction Narrative Presentation Abstracts Poster Presentations Appendix I: Agenda Appendix II: List of Participants Appendix III: List of Planned Publications||
Multiple Flow Pathways of the Scotian Shelf Water onto Georges Bank
Sheremet, V.1, Y.K. Cho2, R. Beardsley1
In a numerical study of crossover events we found that, for realistic parameters, it is possible to reproduce SSW crossovers by varying the density difference between the shelf and slope waters or the strength of the shelf-break front jet. The change of the flow pattern is very abrupt: a slight increase of slope water temperatures by only 1.5C may significantly increase the frequency of crossover events and potentially allow continuous flow of SSW onto the Georges Bank.
We also conducted a series of laboratory experiments on a rotating platform modeling the flow in the Northeast Channel using an idealized configuration. The barotropic laboratory experiments revealed that, as the flow started to leap across the channel, the onset of separation occurred at a point located farther toward the Gulf of Maine rather than near Browns Bank, which bears a striking resemblance to many satellite images. Introducing the baroclinicity causes the displacement of the separation point toward Browns Bank to be in agreement with numerical results.