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Coastal dynamics off Northwest Iberia during a stormy winter period

机译:在一个暴风雨的冬季,西北伊比利亚沿海地区的海岸

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The consequences of a stormy winter period (2009/2010) on the shelf and coastal dynamics off Northwest Iberia are analysed by using model results in combination with the set of available observations in the frame of the Iberian Margin Ocean Observatory (RAIA), a cross-border infrastructure among North Portugal and Galicia (Spain). During the study winter, the frequent arrival of weather fronts forced river plumes to flow along the inner shelf in a fast (>1 m s−1) jet-like structure. The buoyant current strongly influenced the outer rías, the name of the estuaries in the region, where a strong decay of surface salinity (<10.5) has been observed. Once the weather front has passed, the wind reversal forced the offshore expansion of river plumes and also the development of a winter upwelling event. Thermohaline patterns in both model and observations revealed an intrusion of warm (>15 °C) and salty (>35.9) waters into the rías associated with the Iberian Poleward Current. Finally, some Lagrangian modelling experiments were performed to analyse the transport ability of the plume and the effect that could have had in the biological material trapped on it. The experiments reveal that an overall northward displacement of surface particles will be expected after several alternate wind events.
机译:通过使用模型结果并结合伊比利亚边缘海洋观测站(RAIA)框架中的一组可用观测值,分析了暴风雨冬季(2009/2010)对西北伊比利亚沿海陆架和沿海动力学的影响北部葡萄牙和加利西亚(西班牙)之间的边境基础设施。在研究冬季,天气前沿的频繁到来迫使河羽以快速的(> 1m s-1)喷射状结构沿着内层架流动。浮力强烈影响着外部河口,即该地区河口的名称,在该区域已观察到表面盐度强烈衰减(<10.5)。一旦天气转瞬即逝,逆风迫使河羽向海上扩张,并导致冬季上升事件。在模型和观测结果中,盐卤模式都显示出温暖的(> 15°C)和咸的(> 35.9)水侵入与伊比利亚波兰沃德潮流相关的里亚斯河。最后,进行了一些拉格朗日建模实验,以分析羽流的运输能力以及可能对捕获在其上的生物材料产生的影响。实验表明,在几次交替的风事件之后,预计表面颗粒的整体向北位移。

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