Details

Autor(en) / Beteiligte

• Amores, Angel
• Monserrat, Sebastià

Titel

Hydrodynamic comparison between the north and south of Mallorca Island

Ist Teil von

• Journal of marine systems, 2014-10, Vol.138, p.40-50

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2014

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• A hydrodynamic comparison between two zones of fishing interest, one located to the north and the other to the south of Mallorca Island (Balearic Islands, Western Mediterranean) was done. The comparison was conducted using the data from two moorings, one placed in the middle of the Balearic Current, in the Balearic subbasin (herein, Sóller) and the other in the Mallorca Channel, near the Algerian subbasin (called Cabrera). The instruments moored, continuously recorded the temperature, salinity and currents at different depths, for over 15months. The data analysis suggests that Sóller is hydrodynamically more active than Cabrera, at least during the time of recording the measurements. The mean currents were higher at Sóller than at Cabrera at all depths, also showing greater maximum speeds and variability. In addition, the presence of more mesoscale eddies in Sóller became evident from the altimetry data. These eddies were not only significantly more energetic near the surface, they also generally reached to greater depths, affecting the velocities of the seabed currents. Subsequent to each significant eddy episode, strong changes in temperature and/or salinity were observed, along the entire water column. Spectral analysis revealed the presence of high frequency oscillations with periods of a few hours. One energy peak, with a period around 3.7h, was observed at both locations, probably related to trapped waves around Mallorca or the Balearic Islands, while others (3h and 2h) were reflected only in Sóller, suggesting they could be associated with some standing resonance waves between the Iberian Peninsula and Mallorca. •Hydrodynamic comparison between North and South of Mallorca Island was performed.•The comparison was done with data from two mooring lines and satellite.•More eddies were detected in the northern part, some of them reaching the seabed.•We detected high frequency oscillations probably related to trapped waves.