ABSTRACT A three-dimensional regional circulation model is used to investigate the internal M2 tide structure in the Strait of Canso located in eastern Nova Scotia, Canada. The embayment, an active shipping port, was found to have M2 baroclinic velocities occasionally reaching 0.15 m s−1 and typically faster than the barotropic tide. An internal tide spatial structure develops, characterized by the first vertical mode, and highly sensitive to the details of stratification. A region near the mouth of the Strait, with a strong cross-bathymetry barotropic flow was identified as the main generating site. The regular “canyon-like” features of the Strait concentrate the energy towards the bottom and head and, under favourable conditions, reflect energy from the head, forming a standing wave. The modelling study found that, although some internal tide is generated year-round, only summer stratification conditions were favourable for standing wave development because of both increased internal energy levels and longer wavelengths capable of transporting the energy farther up the Strait. A balanced internal energy budget for the area highlights a tendency towards local dissipation and enhanced mixing rates. Persistent convection cells and upwelling zones suggest possible impacts on biological activity, sediment, and oil spill dynamics in the region. The findings are validated with current meter and water level observations.

中文翻译：

---

坎索海峡内潮汐建模

摘要 利用三维区域环流模型研究了加拿大新斯科舍省东部坎索海峡的内部 M2 潮汐结构。海湾是一个活跃的航运港口，被发现具有 M2 的斜压速度，偶尔会达到 0.15 m s-1，并且通常比正压潮汐速度更快。内部潮汐空间结构发展，以第一垂直模式为特征，对分层细节高度敏感。海峡口附近有强烈的跨水深正压流的地区被确定为主要的产生地点。海峡规则的“峡谷状”特征将能量集中到底部和头部，在有利的条件下，从头部反射能量，形成驻波。建模研究发现，尽管全年都会产生一些内部潮汐，但只有夏季分层条件才有利于驻波的发展，因为内部能级增加，而且波长更长，能够将能量输送到海峡更远的地方。该区域平衡的内部能量预算突出了局部耗散和混合速率增强的趋势。持久对流单元和上升流区表明可能对该地区的生物活动、沉积物和溢油动态产生影响。研究结果得到了电流表和水位观测的验证。该区域平衡的内部能量预算突出了局部耗散和混合速率增强的趋势。持久对流单元和上升流区表明可能对该地区的生物活动、沉积物和溢油动态产生影响。研究结果得到了电流表和水位观测的验证。该区域平衡的内部能量预算突出了局部耗散和混合速率增强的趋势。持久对流单元和上升流区表明可能对该地区的生物活动、沉积物和溢油动态产生影响。研究结果得到了电流表和水位观测的验证。