Journal
MARINE CHEMISTRY
Volume 70, Issue 4, Pages 339-357Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0304-4203(00)00036-0
Keywords
chromophoric dissolved organic matter; dissolved organic carbon; European Atlantic coastal area; West Mediterranean Sea (Gulf of Lions)
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The absorption coefficient of chromophoric dissolved organic matter (aCDOM) has been found to be correlated with fluorescence emission (excitation at 355 nm). In the coastal European Atlantic area and in the Western Mediterranean Sea (Gulf of Lions), a significant statistical dependence has been found between aCDOM and fluorescence with dissolved organic carbon (DOC) concentration. The relationship shows that, in the river plume areas (Rhine in the North Sea and Rhone in the Gulf of Lions), a consistent fraction of DOC (from 40% to 60% of the average of the DOC measured) is non-absorbing in visible light range, where the dissolved organic matter (DOM) is typically absorbent. In comparison, in the open sea, apparently not affected by the continental inputs, the entire nOC belongs to the chromophoric DOM whose specific absorption is lower (5 to 10 times) than that found in the river plume areas. (C) 2000 Elsevier Science B.V. All rights reserved.
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