When an internal solitary wave (ISW) breaks over a sloping bottom in the ocean, turbulent mixing causes energy dissipation that is associated with the breaking type. In a two-layer fluid, when pycnocline thickness is negligible, the breaking can be categorized into one of four breaker types: surging, plunging, collapsing, and fission breakers. The latest classification into four breaker types is based on wave slope, bottom slope gradient and an internal Reynolds number. However, it was unknown if this classification can be applied to categorize the breaking of an ISW under thick pycnocline conditions. The present study uses two-dimensional numerical simulations to investigate energy dissipation due to an ISW breaking over a slope under changing pycnocline thickness. We found that the classification can categorize all breaker types even when pycnocline thickness varies. Also, the practical reflection coefficient, defined in this study, becomes smaller for collapsing and surging breakers with the increase in the pycnocline thickness due to an offshore shift in breaking points. In contrast, the practical reflection coefficient is found to be constant for plunging and fission breakers under changing pycnocline thickness.

当内部孤立波（ISW）越过海洋的倾斜底部时，湍流混合会导致与破坏类型相关的能量耗散。在两层流体中，当比高ococline厚度可以忽略不计时，断裂可分为以下四种破碎锤类型之一：涌动破碎锤，跌落破碎锤，塌陷破碎锤和裂变破碎锤。根据波的斜率，底部的斜率梯度和内部的雷诺数，对最新的四种断路器类型进行了分类。但是，尚不清楚该分类法是否可用于在浓密比索环礁条件下对ISW的破坏进行分类。本研究使用二维数值模拟来研究能量变化，该变化是由于不断变化的坡线厚度下ISW越过斜坡而引起的。我们发现，即使比诺可克林厚度变化，该分类也可以对所有断路器类型进行分类。此外，由于断裂点的离岸位移，随着台球厚度的增加，本研究中定义的实际反射系数也变得更小，以使崩塌和汹涌的破碎机破碎。相比之下，发现实际的反射系数在变化的台青厚度下对于切入式和裂变式破碎器而言是恒定的。