The role of spiral eddies in the non-linear instability at a two-geofluid interface

Summary form only given. Based on new approaches to the non-linear instability at a two-geofluid interface, the interaction of plumes and spiral eddies at the sea surface, among others, are investigated. As-coordinate numerical model produces the broad structure of the coastal dynamics in the South-Eastern Adriatic Coast where eight rivers are discharged. The complex picture of the circulation in the region is conjectured to be a balance between conventional forcing (tides, atmosphere and buoyancy) and the hitherto unknown effect of spiral eddies as a new show of the non-linear instability at a two-geofluid interface.