BUSCADOR RECOLECTA

The acquisition parameters of ESCI-Valencia Trough are: streamer 4500 m, 180 channels, group interval 25 m, sample rate 4 ms., The ESCI-Valencia Trough deep vertical reflection profile extends the crustal image of the ECORS-Pyrenees profile to the Mediterranean coast and provides a crustal transect of the NE Iberian margin. It is a 450 km lenght profile in a NW-SE direction between the Tarragona coast and the SE of Mallorca., Comisión Internacional de Ciencia y Tecnología (CICYT); GEO89-0858; GEO90-0733; PB86-0619; C91-0013.--, Peer reviewed

BIOANTART Cruise (29HE19930119) carried out on the Research Vessel Hespérides in 1993, Dynamic oceanography and productivity of the Bransfield Strait during the austral summer. (BIOANTAR 93). 1) Characterize the different water masses of the Bransfield Strait 2) Study the distribution and variability of the water masses that occupy the Strait from their hydrographic characteristics 3) Analyze the generation and propagation of short surface waves and half period 4) Determine the three-dimensional structure of circulation due to the main regional hydrodynamic agents. 5) Study of the influence of water masses on the distribution of planktonic communities. 6) Study of the importance of the essential nutrients on the growth and metabolism of phytoplankton. 7) Study of the contribution of the different fractions of plankton to abundance and primary productivity. 8) Study of the variability in the importance of microheterotrophic processes during the succession in the trophic structure of ecosystems. 9) Determine the respiratory metabolism of Antarctic microplankton and its relationships with environmental conditions. 10) Study of metabolism (respiration, growth and excretion) of zooplankton and its contribution to the decline of phytoplankton bloom. 11) Preparation of a balance of total production, net community production, exported production and respiratory metabolism of plankton 12) Study of the importance of the Bransfield Strait as spawning area and fish breeding 13) Evaluate the net metabolism of the upper layers of the Antarctic ocean during the austral summer 14) Determine the balance between autotrophic and heterotrophic organisms 15) Study of the role of light as a factor limiting the growth of phytoplankton populations

VARIMED Cruise (29HE19930601) carried out on the Research Vessel Hespérides in 1993, Mesoscale variability in the Western Mediterranean.(VARIMED). This campaign aims to study the role of mesoscale circulation structures in the general circulation of the surface layer and in the processes that determine both the biological productivity and the transport of organisms and sedimentary material, 1) Study of the structures of mesoscale and its interaction with the average circulation in frontal zones 2) Study of the coupling between the variability of physical and biological phenomena on a slope-platform front 3) Study of the relationship between platform-slope water mass exchanges with the Passive and dynamic transport of larval stages of pelagic and demersal species

MAST-1 Cruise (29HE19930805) carried out on the Research Vessel Hespérides in 1993, European Coastal Transition Zone-Islas Canarias. -To study the gradient of the hydrographic and biological transition, to the south of the Archipelago, from the oceanic waters west of the island of La Palma to the interior of the platform of the coast of Africa.- To study the structure and dynamics of the water of upwelling filaments, which extends towards the Canaries. -Make a detailed study of the fronts on both sides of the trail, and both sides of the filament. - Analyze the mechanisms of formation of the eddies, and calculate the speed of their displacement, in relation to the surface current. - Quantify the importance of eddies and filaments in the increase of productivity and transport of organic matter in the Canary region

CAMEL Cruise (29HE19931015) carried out on the Research Vessel Hespérides in 1993, The general scientific objective of the CAMEL 93 campaign is focused on the knowledge of the recent geological evolution, in a broad sense, of the intersaction zone between the final section of the Equatorial Canyon and the western end of the Transformative Fracture of Ferenando de Noronha. Another general objective of the campaign consists in the paleoceanographic study of the sediments deposited in the eastern and western Atlantic continental margins in areas near the equatorial zone during the last 400,000 years, and to deduce the evolution of the water masses of Antarctic origin, its distribution and most recent evolution, and the effects on ocean circulation resulting from the oscillations of the Antarctic ice caps. Morphosedimentary and geophysical geological study based on the obtaining of a mosaic of bathymetric profiles with multibeam, as well as geophysical profiles with high-resolution parametric probe (BPS), single-channel reflection seismic (air cannons), supplemented with background sonography obtained with sonar of lateral sweep and with profiles of magnetometry. Three samples have been made with gravity corer

GEBRA Cruise (29HE19931203) carried out on the Research Vessel Hespérides in 1993, Geological evolution of the Bransfield Basin and the South Scotia Sea Ridge. Work has been carried out with multibeam, single-channel reflection seismic, parametric BPS probe, magnetometry, gravity cores extraction and instrument anchoring. These techniques have allowed to characterize in great detail the morphostructure, the sedimentary coating and the magnetic anomalies of the studied area