||Le detroit de Gibraltar et ses aires peripheriques: un site de forte productivite permanente
||Minas H, Coste B, Minas M
||Production et relations trophiques dans les ecosystemes marins. Yalta 27 Octobre-2 Novembre 1984
||Actes de colloques. Ifremer. Brest [ACTES COLLOQ. IFREMER.]. 1984
||MED, Gibraltar Strait, Temperature effects, Nitrates, Phosphates, Water mixing, Water masses, Tracers, Oxygen minimum layer, Satellite sensing, Upwelling, Nutrients (mineral), Primary production
||Satellite infrared imagery shows that a cooling of the sea furface occurs in the Strait of Gibraltar and along the Spanish coast in the Alboran Sea. Since this cooling has an internal origin, it implicates also a nutrient transport into the photic zone. A high chlorophyll area off the Spanish coast, also shown by ocean color imagery (CZCS, Nimbus 7) demonstrate a high productivity. Hydrological and chemical observations made during the French "MEDIPROD IV" cruise on the Jean-Charcot allow to explain this high productivity. The high productivity entertains at mid-depth, by organic sedimentation, an oxygen minimum layer which corresponds to a nutrient maximum (phosphate and nitrate). This high biological activity is useful for hydrological purposes since the tracer qualities of biochemical parameters lead to a better understanding of the circulation pattern and especially of the origin of the Mediterranean outflow.