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From the last 1980s different initiatives have been carried out by the Spanish Institute of Oceanography (IEO) at its Oceanographic Centre of Santander to progressively increase its ocean observing system capabilities. From 1991, shelf and slope waters of the Southern Bay of Biscay are regularly sampled in a monthly hydrographic line north of Santander to a maximum depth of 1500m. In 2003, the Santander...
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