Percorrer por autor "Serpa, Tiago"
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- Deep-sea ecosystems of the North Atlantic Ocean: discovery, status, function and future challengesPublication . Allcock, A. Louise; Amon, Diva J.; Bridges, Amelia E. H.; Colaço, Ana; Escobar-Briones, Elva; Hilário, Ana; Howell, Kerry L.; Mestre, Nélia; Muller-Karger, Frank E.; Priede, Imants G.; Snelgrove, Paul V. R.; Sealey, Kathleen Sullivan; Xavier, Joana R.; Addamo, Anna M.; Amaro, Teresa; Bandara, Gayathra; Bax, Narissa; Braga-Henriques, Andreia; Brandt, Angelika; Brix, Saskia; Cambronero-Solano, Sergio; Cedeño – Posso, Cristina; Copley, Jonathan T.; Cordes, Erik; Cortés, Jorge; Croquer, Aldo; Cuvelier, Daphne; Davies, Jaime S.; Durden, Jennifer M.; Esquete, Patricia; Foster, Nicola L.; Frutos, Inmaculada; Gasbarro, Ryan; Gates, Andrew R.; Gomes, Marta; Goodwin, Lucy V. M.; Horton, Tammy; Hourigan, Thomas; Hoving, Henk-Jan; Jones, Daniel O. B.; Joshi, Siddhi; Kingon, Kelly C.; Lörz, Anne-Nina; Martins, Ana; Merten, Véronique; Metaxas, Anna; Milligan, Rosanna J.; Molodtsova, Tina N.; Morato, Telmo; Morrissey, Declan; Naranjo-Elizondo, Beatriz; Narayanaswamy, Bhavani E.; Olafsdottir, Steinunn H.; Parimbelli, Alexa; Peña, Marian; Piechaud, Nils; Ragnarsson, Stefan; Ramalho, Sofia P.; Rodrigues, Clara F.; Ross, Rebecca E.; Saeedi, Hanieh; Santos, Régis; Schwing, Patrick T.; Serpa, Tiago; Shantharam, Arvind K.; Stevenson, Angela; Yánez-Suárez, Ana Belén; Sutton, Tracey T.; Svavarsson, Jörundur; Taylor, Michelle L.; Grient, Jesse van der; Zwerschke, NadeschaThe North Atlantic is an ocean basin with a diversity of deep-sea ecosystems. Here we provide a summary of the topography and oceanography of the North Atlantic including the Gulf of Mexico and Caribbean Sea, provide a brief overview of the history of scientific research therein, and review the current status of knowledge of each of 18 pelagic and benthic deep-sea ecosystems, with a particular focus on knowledge gaps. We analyse biodiversity data records across the North Atlantic and highlight spatial data gaps that could provide important foci for future expeditions. We note particular data gaps in EEZs of nations within and bordering the Caribbean Sea. Our data provide a baseline against which progress can be tracked into the future. We review human impacts caused by fishing, shipping, mineral extraction, introduction of substances, and climate change, and provide an overview of international, regional and national measures to protect ecosystems. We recommend that scientific research in the deep sea should focus on increasing knowledge of the distribution and the connectivity of key species and habitats, and increasing our understanding of the processes leading to the delivery of ecosystem services. These three pillars - distribution, connectivity, ecosystem function - will provide the knowledge required to implement conservation and management measures to ensure that any deep-sea development in the future is sustainable. Infrastructure and capacity are unevenly distributed and implementation of strategies that will lead to more equitable deep-sea science is required to ensure that essential science can be delivered.
- In situ and satellite characterization of a meddy north of the Azores: NA-VICE cruise (2012), Azores to IcelandPublication . Serpa, Tiago; Bashmachnikov, Igor; Relvas, Paulo; Martins, AnaThe influx of Mediterranean Water through the Strait of Gibraltar significantly influences the Northeast Atlantic. This inflow gives rise to distinctive oceanographic features known as Mediterranean Water Eddies (Meddies), which are characterized as deep, anticyclonic lenses of warm, saline water. During the R/V Knorr cruise KN207-03, conducted from the Azores to Iceland in the summer of 2012 as part of the international NA-VICE project, a meddy was identified at 41.3◦N, 27.1◦W. Its main physical properties were determined using in situ measurements from a Conductivity-Temperature-Depth (CTD) profiler and an Acoustic Doppler Current Profiler (ADCP). The meddy exhibited salinity and temperature anomalies of 0.26 and 2.4◦C, respectively, along with azimuthal velocities reaching 0.38 m s − 1 . These characteristics were compared with established criteria from previous studies to confirm that the observed feature – located further north than most previously documented meddies – met the classification requirements. At the time of the cruise, a cyclonic eddy exhibiting Mediterranean Water characteristics was detected north of the meddy. The analysis suggests that these features interacted, resulting in trapping of Mediterranean Water beneath the cyclone. The meddy sea surface expression was examined using altimetry data combined with an eddy detection algorithm, revealing a Sea Level Anomaly of 14 cm and a radius of 57 km. Additionally, altimetry and Argo data were used to reconstruct the meddy trajectory, indicating that it originated in the Irish continental shelf. This finding supports the hypothesis that meddies can form north of the Iberian Peninsula, as far as the extension of the Mediterranean Outflow.