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The seasonal variability of chlorophyll in the Mediterranean and its relation to nutrient seasonality in coastal areas

AutorPeters, Francesc ; Romero, Estela ; Gallisai, R. ; Guadayol, Òscar
Fecha de publicación26-nov-2013
CitaciónIntegrating New Advances in Mediterranean Oceanography and Marine Biology. Meeting program: 55 (2013)
ResumenThe temporal variability of chlorophyll in the Mediterranean is heavily dominated by a seasonal signal. Winter-spring mixing of nutrient rich deep water into the upper sunlit layers fuels much of this seasonality. Seasonality (SI index) as the proportion of total chlorophyll variability over time that is accounted for the annual recurring signal is very high in the open Mediterranean, with the highest values found in a large area of the western Mediterranean and the strait of Sicily. High sesonality is also found in some areas of the central and eastern Mediterranean. Low seasonality areas are the Gulf of Lyons with the discharge of the Rhone River, the northern Adriatic Sea with the Po discharge, the Alboran Sea with the entrace of Atlantic water, the Tunisian shelf, the Nile river influence area and the northern Aegean Sea where waters interchange with the Black Sea through the Sea of Marmara. In the Catalan Sea (Northwestern Mediterranean), the influence of the non-seasonal variability from the Gulf of Lions, produced probably by the discharge of the Rhone, is seen in the north with a clear influence cutoff south of 41.3 N. The influence of the highly seasonal open Mediterranean waters is seen east of the Balearic Islands at ca. 4 E. Littoral waters and the influence of the Ebro discharge can also be seen reducing the seasonal component of chlorophyll variability. Transects perpendicular to shore show the increase in the SI. In general, areas with larger annual mean chlorophyll tend to have a lower SI. Areas of high chlorophyll experience more irregular surface water nutrient enrichment such as upwelling or other phenomena. The seasonality of nutrient concentrations will be discussed for some fixed stations in relation to the seasonality of chlorophyll to determine possible primary production driving nutrients
DescripciónSymposium on Integrating New Advances in Mediterranean Oceanography and Marine Biology, 26-29 November 2013, Institut de Ciències del Mar (CSIC), Barcelona, Catalunya, Spain
Versión del editorhttp://www.icm.csic.es/bio/medocean/information.htm#schedule
URIhttp://hdl.handle.net/10261/96666
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