CIRCULATION OF WATER MASSES THROUGH THE IBIZA CHANNEL

An analysis of current velocity, temperature and salinity data collect ed between 15 November 1990 and 24 July 1991 in the Ibiza Channel has been made to illustrate the circulation of the different water masses within this area. At certain stages of early winter, outstanding intru sions of Modified Atlantic Water, lasting a few days, have been observ ed flowing northwards along the eastern part of the Channel. Western M editerranean Intermediate Water appeared for the first time during the middle of February; from March onwards, the thickness of the layer of this water mass increased until it reached its greatest presence duri ng early summer. Simultaneously, the amount of Levantine intermediate Water decreased at the mooring site, being replaced by the MAW. Wester n Mediterranean Deep Water was detected flowing northwards by our deep est measuring device during June and July. This flow may be a seasonal feature of the circulation in the Channel, linked to the production o f Deep Water.