Comparisons between a fine resolution model and observations in the Iberian shelf–slope region

Results from a fine resolution model of the Iberian shelf–slope region are compared with data from cruises conducted in the same area. The agreement between the model and a cruise carried out in May 1993 is qualitatively good. The model is also able to represent the seasonal cycle in the area as revealed by cruises carried out in November 1993 and July/August 1994. Quantitative agreement between the model and the observations is less good and this is a result of limitations in the data used to force the model at the surface and the boundaries. Features of the circulation which are modeled well include seasonal coastal upwelling, the winter Portugal Coastal Countercurrent and the spreading of Mediterranean Water. Coastal upwelling occurs in summer and is enhanced off Cape Finisterre and Cape Roca. The Portugal Coastal Countercurrent exists in the model as a poleward flow over the upper continental slope which is strongest in winter but persists throughout the year and in summer is seen as a weak sub-surface feature. Mediterranean Water spreads northwards in two cores with a distinct focussing towards the coast to the north of the Tagus Plateau. The particular form of open boundary conditions employed perform well with little evidence of false reflection of outgoing waves.