A simplified model is proposed to describe the interaction of meddies with a seamount. In the absence of topography, the meddy obtained in this model moves very slowly to the west. However, in the presence of Gaussian...A simplified model is proposed to describe the interaction of meddies with a seamount. In the absence of topography, the meddy obtained in this model moves very slowly to the west. However, in the presence of Gaussian-shaped topography (seamount) the movement of the meddy is strongly controlled by its site. As the seamount is located in the southwest side of a meddy, this meddy will be induced to move southward. But if the seamount is located in the west side of the meddy, the seamount forcing will cause a southwest movement of such a meddy. For two meddies in the absence of seamount, the two meddies will be located on the northwest-southeast axis due to their interaction, which is the natural evolution of two anticyclonic eddies. However, the presence of a seamount will cause the meddies to merge rapidly. This merging is also influenced by the site of the seamount, the closer the seamount is to the two meddies, the faster the two meddies merge. In addition, the direction of the corotating two meddies in the northwest-southeast axis is also influenced by the site of the seamount.展开更多
Distribution of current and chemical tracers along two hydrographic sections across Ring 94S, a Kuroshio detached eddy in the South China Sea, were studied. Results suggest that while currents on its offshore side mai...Distribution of current and chemical tracers along two hydrographic sections across Ring 94S, a Kuroshio detached eddy in the South China Sea, were studied. Results suggest that while currents on its offshore side maintained quasi-geostophic, a balance was no reach on its onshore side. It is then suggested that interaction Ring 94S with the slope might play an important role that could break down the quasi-geostrophic balance and caused deformation of the current field. 18O distribution supports previous discussion that water mass inside the ring is of Kuroshio origin. Distributions of chemical tracer reveal strong stirring effect at the edge of Ring 94S, which may play an important role in vertical exchange across the thermocline.展开更多
文摘A simplified model is proposed to describe the interaction of meddies with a seamount. In the absence of topography, the meddy obtained in this model moves very slowly to the west. However, in the presence of Gaussian-shaped topography (seamount) the movement of the meddy is strongly controlled by its site. As the seamount is located in the southwest side of a meddy, this meddy will be induced to move southward. But if the seamount is located in the west side of the meddy, the seamount forcing will cause a southwest movement of such a meddy. For two meddies in the absence of seamount, the two meddies will be located on the northwest-southeast axis due to their interaction, which is the natural evolution of two anticyclonic eddies. However, the presence of a seamount will cause the meddies to merge rapidly. This merging is also influenced by the site of the seamount, the closer the seamount is to the two meddies, the faster the two meddies merge. In addition, the direction of the corotating two meddies in the northwest-southeast axis is also influenced by the site of the seamount.
文摘Distribution of current and chemical tracers along two hydrographic sections across Ring 94S, a Kuroshio detached eddy in the South China Sea, were studied. Results suggest that while currents on its offshore side maintained quasi-geostophic, a balance was no reach on its onshore side. It is then suggested that interaction Ring 94S with the slope might play an important role that could break down the quasi-geostrophic balance and caused deformation of the current field. 18O distribution supports previous discussion that water mass inside the ring is of Kuroshio origin. Distributions of chemical tracer reveal strong stirring effect at the edge of Ring 94S, which may play an important role in vertical exchange across the thermocline.
