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handle: 10261/132048
[FR] La matière organique dissoute chromophorique (CDOM) est une fraction significative du pool global de matière organique dissoute (MOD) dans les océans. La CDOM absorbe une partie de la lumière dans le domaine du rayonnement ultraviolet (UV-R) et du visible. Une fraction de cette CDOM peut émettre une fluorescence lorsqu'elle est excitée par un UV-R. Cette fraction est alors appelée matière organique dissoute fluorescente (FDOM). La CDOM a donc d'une part, un effet positif, en protégeant les cellules contre les dommages causés par les UV-R, mais d'autre part, un effet négatif en réduisant la quantité de radiation disponible pour la photosynthèse. [...]
[EN] Chromophoric dissolved organic matter (CDOM) is a major fraction of dissolved organic matter (DOM). CDOM absorbs light over a broad range of ultraviolet (UV-R) and visible wavelengths. A small fraction of CDOM can emit fluorescence when excited by ultraviolet radiation; so called fluorescent dissolved organic matter (FDOM). CDOM plays a key role in regulating light penetration into the ocean, absorbing high-energy electromagnetic spectrum (visible and ultraviolet light) waves. On one hand, it protects aquatic organisms of potential photo-damage; in the other hand it induces a negative effect by reducing light for photosynthesis. [...]
Memoria de tesis doctoral presentada por Elvia Denisse Sánchez Pérez para obtener el título de Doctora en Oceanographie por la Université Pierre et Marie Curie (UPMC), realizada bajo la dirección del Dr Pascal Conan de la Université Pierre et Marie Curie (UPMC) y de la Dra. Celia Marrasé Peña del Institut de Ciències del Mar (ICM-CSIC).-- 156 pages
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Abiotic, Abiotiques, Déposition de poussière, Atmospheric deposition, Northwestern Mediterranean, Biotiques, FDOM, CDOM, MOD, DOM, Biotic, Méditerranée nord-occidentale
Abiotic, Abiotiques, Déposition de poussière, Atmospheric deposition, Northwestern Mediterranean, Biotiques, FDOM, CDOM, MOD, DOM, Biotic, Méditerranée nord-occidentale
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