Reconstrucción paleoceanográfica de los últimos 32 ka en el Atlántico Nororiental y Mediterráneo Occidental a partir del desarrollo de técnicas geoquímicas en asociaciones de cocolitofóros
[EN] Coccolithophores are calcareous unicellular algae that play an important role in the carbon cycle because they take carbon from the surface waters during the photosynthesis and the calcification and transfer it to the deep ocean. Hence, they are key actors in the regulation of the rate of CO2 exchange between the atmosphere and the ocean, and therefore, in the global climate change. This thesis presents studies on coccolith geochemistry and morphometry from cores MD95-2043 and MD03-2705 retrieved from the Alboran Sea and off Mauritania respectively. The Alboran Sea is the westernmost basin of the Mediterranean Sea, and therefore, the direct link with the Atlantic. The interaction with the Atlantic waters makes it one of the most productive areas within the Mediterranean, moreover, as a semienclosed basin, is particularly sensitive to the climatic changes occurring at the mid-latitude regions. Alternatively, the northwest African coast is a highly productive region where NE trade winds induce a coastal upwelling whereas eolian supplies from the nearby Sahara fertilize the surface waters. In both sites, the climatic and paleoceanographic conditions are controlled by the seasonal latitudinal migrations of the Intertropical Convergence Zone (ITCZ).
Tesis y disertaciones académicas, Universidad de Salamanca (España), Tesis Doctoral, Academic dissertations, Cocolitóforos, Geoquímica, Geochemistry, Coccoliths, Alborán, Mar de, Alboran Sea, Mauritania, Paleoceanografía, Paleoceanography
Networked Digital Library of Theses and Dissertations