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Abstract(s)
O presente trabalho é focado no estudo dos processos que ocorrem ao longo da
Costa Portuguesa. Este estudo consistiu na análise e comparação de diversos artigos e trabalhos de interesse, por forma a realizar uma revisão mais pormenorizada sobre o
estado da arte do conhecimento da oceanografia física da região. De modo geral, várias análises apoiam a ideia de que os processos de mesoescala, sobrepostos à variação em maiores escalas, são o fator principal responsável pelo funcionamento do ecossistema da região oeste e sudoeste da península Ibérica. As últimas pesquisas revelam uma estrutura complexa na plataforma e talude continentais de
correntes costeiras que interagem com eddies, plumas, filamentos e frentes de upwelling, perturbações na camada superficial de correntes subsuperficiais e ondas internas. Todas estas contribuem, de diferentes formas, para surtir um efeito sobre o ecossistema. A suposta circulação de inverno menos suscetível a variações apresenta também uma significativa atividade de mesoescala, na forma de escoamentos associados a eddies da Corrente da Vertente, fenómenos intermitentes de upwelling e de fluxos em direção ao polo, junto a costa. O atual conhecimento incompleto deste complexo sistema peca por continuar a apresentar um grande número de questões e desafios que devem ser abordadas se quisermos chegar a uma melhor compreensão e capacidade de previsão para o funcionamento oceanográfico da Costa Portuguesa.
The present work is focused on the study of the recognized processes along the Portuguese Coast. This study consisted on the analysis and comparison of various articles and papers of interest, in order to realize a more detailed review about the state of art of the region physical oceanography knowledge. In general, several analyzis support the idea that the mesoscale processes, superimposed on the larger scale variability, are the major factor controlling the ecosystem functioning in the Western Iberian Peninsula. A complex structure alongshore the slope and shelf, and coastal currents that interact with eddies, buoyant plumes, upwelling filaments and fronts, surface layer expressions of the subsurface circulation and internal waves is revealed by the latest research. All of these contribute, in different ways, to have an effect on the ecosystem. The supposedly less variable winter circulation also exhibits significant mesoscale activity, in the form of eddy shedding from the poleward slope current, intermittent upwelling events and transient nearshore poleward flows. The present, still incomplete knowledge, of this complex system presents a number of challenges and questions that must be addressed if we are to arrive at a satisfactory understanding and predictive capability for the oceanographic functioning of the Portuguese Coast.
The present work is focused on the study of the recognized processes along the Portuguese Coast. This study consisted on the analysis and comparison of various articles and papers of interest, in order to realize a more detailed review about the state of art of the region physical oceanography knowledge. In general, several analyzis support the idea that the mesoscale processes, superimposed on the larger scale variability, are the major factor controlling the ecosystem functioning in the Western Iberian Peninsula. A complex structure alongshore the slope and shelf, and coastal currents that interact with eddies, buoyant plumes, upwelling filaments and fronts, surface layer expressions of the subsurface circulation and internal waves is revealed by the latest research. All of these contribute, in different ways, to have an effect on the ecosystem. The supposedly less variable winter circulation also exhibits significant mesoscale activity, in the form of eddy shedding from the poleward slope current, intermittent upwelling events and transient nearshore poleward flows. The present, still incomplete knowledge, of this complex system presents a number of challenges and questions that must be addressed if we are to arrive at a satisfactory understanding and predictive capability for the oceanographic functioning of the Portuguese Coast.
Description
Keywords
Península Ibérica, Corrente da Vertente, mesoescala, upwelling e circulação na plataforma interna. Iberian peninsula, poleward slope current, mesoescale, upwelling and innershelf circulation.