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- Investigating ocean acidification off the Iberian Margin: Oceanographic results from the CARBO-ACID cruisePublication . Salgueiro, Emilia; da Silva Magalhães, Vitor Hugo; Matos, Lelia; Rebotim, Andreia; Sousa, Fátima; Schweizer, Magali; González-Martín, María; Rodrigues Batista, Luis Filipe; Abrantes, Fatima; Brotas, Vanda; Castro, Carmen G.; Douville, Eric; Flores, José-Abel; Froján, María; Fontela, Marcos; Frank, Norbert; Mega, AlineABSTRACT: 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 only to reconstruct the pH variability under different environmental conditions, but also to estimate the biogeochemical changes along the oceanic coastal waters as the anthropogenic influence increases. The obtained results will contribute to better understand and model the biological response to the expected ocean temperature and pH changes in the future. This work aims to document the type of samples collected, the planned analyses strategy and to show the first oceanographic obtained results in the study area.
- Sea surface temperature variations revealed by planktonic foraminifera at the Portuguese margin during the HolocenePublication . Mega, Aline; Salgueiro, Emilia; Rebotim, Andreia; Voelker, Antje; Cruz, Joana; Calvo, Eva; Abrantes, FatimaABSTRACT: Global warming, resulting from increasing human emissions of greenhouse gases, is raising ocean temperatures, projecting an increase of 2.6 °C by the end of this century. With the aim of refining climate models and predicting future regional climate conditions more accurately, this study reconstructs sea surface water temperature during the current interglacial period, the Holocene, off the southwest coast of Portugal, through the analysis of associations of planktonic foraminifera. During this period, surface waters in the region south of Sines exhibited higher and more stable temperatures compared to those detected further north, in the Estremadura spur. The northern region, due to its geographical position, more prominently highlights short-duration cold events associated with polar ice melting and marine circulation.