The evolution and distribution of temperature and salinity in the
harbour were studied with the weekly CTD surveys during the winter
and summer period. The first analysis was on the seasonal evolution of
the thermal and haline distribution (see Fig. 2 for a representative
example of the variety of results obtained during the campaigns). In
winter, waters are usually well mixed in the vertical with increments
of only 0.3 °C from surface to bottom while, in summer, a marked
stratification is established with vertical gradients of 3 °C. Furthermore,
additional interesting information is obtained from these data