Process Studies of the Complex Mesoscale Circulation Observed in the Western Mediterranean Sea
Abstract
Satellite observations of the Mediterranean Sea reveal complex circulation patterns which are time-dependent. This is in contrast to the simple idealized flow patterns presented in historical studies based on limited in situ observations. These pre-satellite studies were based on collections of data which were not synoptic in time nor space. A series of process studies using a hierarchy of numerical ocean models has been undertaken in an attempt to elucidate the dynamics controlling the observed circulation. The numerical models used are variations of a multilayered primitive equations model. The simplest version is a one-active layer, reduced gravity model forced by winds, inflow/outflow mass flux and/or density variations. The results from this version yield flow patterns which are qualitatively similar to the historical representations, but do not help to understand the time-dependent mesoscale variability observed in the remotely-sensed data. Additional complexities such as multiple layers allow for baroclinic instabilities. Bottom topography, realistic non-climatic wind stress, etc. add to the realism of the numerical simulations. In most cases a combination of forcing mechanisms are required to produce a simulation of the observed circulation patterns. (mm)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1990
- Accession Number
- ADA229828
Entities
People
- George Heburn
Organizations
- United States Naval Research Laboratory