6 documents found, page 1 of 1
Investigating ocean acidification off the Iberian Margin: Oceanographic results...
Salgueiro, Emilia; da Silva Magalhães, Vitor Hugo; Matos, Lelia; Rebotim, Andreia; Sousa, Fátima; Schweizer, Magali; González-Martín, MaríaABSTRACT: The EUROFLEETS+ CARBO-ACID cruise was carried out to investigate the ocean acidification effects on the carbonate organisms (coccolithophores, pteropods, foraminifera, and corals) along the W Iberian Margin. Samples of the water column, plankton, corals and sediments were collected to investigate the acidification effects since the pre-industrial Era until the present. These samples will allow not onl...
Spatial and temporal variability in coccolithophore abundance and distribution ...
Ausin, Blanca; Zuniga, Diana; Flores, Jose A.; Cavaleiro, Catarina; Frojan, Maria; Villacieros-Robineau, Nicolas; Alonso-Perez, Fernando; Arbones, BelenA systematic investigation of the spatial and temporal variability in coccolithophore abundance and distribution through the water column of the NW Iberian coastal up-welling system was performed. From July 2011 to June 2012, monthly sampling at various water depths was conducted at two parallel stations located at 42 degrees N. Total coccosphere abundance was higher at the outer-shelf station, where warmer, nu...
Diatoms as a paleoproductivity proxy in the NW Iberian coastal upwelling system...
Zuniga, Diana; Santos, Célia; Frojan, Maria; Salgueiro, Emilia; Rufino, Marta; De la Granda, Francisco; Figueiras, Francisco G.; Castro, Carmen G.The objective of the current work is to improve our understanding of how water column diatom's abundance and assemblage composition is seasonally transferred from the photic zone to seafloor sediments. To address this, we used a dataset derived from water column, sediment trap and surface sediment samples recovered in the NW Iberian coastal upwelling system. Diatom fluxes (2.2 (+/- 5.6) 10(6) valves m(-2) d(-1)...
Oxygen in the Iberian margin: a modeling study
Reboreda, Rosa; Castro, Carmen G.; Álvarez-Salgado, Xosé A.; Nolasco, Rita; Cordeiro, Nuno G. F.; Queiroga, Henrique; Dubert, JesusHighly productive eastern boundary coastal upwelling areas provide interesting environments to study the physical–biological interactions that govern dissolved oxygen (O2) dynamics. The Iberian Upwelling System is located in the northern limit of the North East Atlantic upwelling region, along the Iberian margin off Portugal and Spain. It presents a marked seasonality in the hydrodynamics and it is under the in...
Seasonal cycle of plankton production in the Iberian margin based on a high res...
Reboreda, Rosa; Nolasco, Rita; Castro, Carmen G.; Álvarez-Salgado, Xosé A.; Cordeiro, Nuno G. F.; Queiroga, Henrique; Dubert, JesusThe seasonal variability of plankton in the entire Iberian margin and the adjacent oceanic region was simulated by applying a NPZD-type biogeochemical model coupled to a physical high resolution configuration of the 3D Regional Ocean Modeling System (ROMS). The NPZD model simulated the time and space evolution of nitrate, phytoplankton/chlorophyll, zooplankton and detritus. Model results were compared to remote...
Modeling the seasonal and interannual variability (2001-2010) of chlorophyll-a ...
Reboreda, Rosa; Cordeiro, Nuno G. F.; Nolasco, Rita; Castro, Carmen G.; Álvarez-Salgado, Xosé A.; Queiroga, Henrique; Dubert, JesusA modeling study of the seasonal and interannual variability of chlorophyll-a has been carried out for the period 2001-2010 along the Iberian shelf and adjacent ocean. A high resolution regional configuration of the three-dimensional Regional Ocean Modeling System (ROMS) has been used, coupled to a N2PZD2-type biogeochemical model. Chlorophyll-a concentration ([Chl]) model outputs were compared to regional obje...