Flow of barotropic tidal currents over topographic features, such as continental slopes and submarine ridges, generates internal gravity waves at tidal periods known as internal tides. Amplitude of these waves are generally large near the generation regions. Analysis of Sea Surface Height (SSH) data, derived from satellite altimeter revealed the amplification of internal tides in the semidiurnal period in the north-central Bay of Bengal (BoB) (around 89\({}^{\circ }\)E, 16\({}^{\circ }\)N), which is about 450 km away from their generation sites. SSH signals found in the north-central BoB (\( \sim \)3 cm) were comparable to the maximum amplitudes (2.5 to 3.5 cm) observed near their potential generation sites in the BoB such as continental slopes in the head of the bay and Andaman-Nicobar (AN) Ridge. Simulations from a high-resolution regional ocean model also confirmed the presence of large internal tide amplitude in the north-central BoB. Our study revealed that convergence of internal tides, which were generated along the concave-shaped source (continental slopes in the head of the bay and the northern parts of AN Ridge), into its focal region caused their amplification in the north-central BoB. It was also found that internal tide energy dissipation rates in this focal region were about 10 times larger than those in other open ocean regions.

诸如大陆坡和海底山脊之类的地形特征上的正压潮流流在称为内潮的潮汐时期产生内部重力波。这些波的振幅通常在产生区域附近较大。从卫星高度计得出的海面高度（SSH）数据的分析表明，在孟加拉北部中部湾（BoB）的半日周期内，内潮放大了（大约89 \（{} ^ {\ circ} \） E ，16 \（{} ^ {\ circ} \） N），距离他们的发电站约450公里。在中北部BoB（\（\ sim \）中找到SSH信号3厘米）相当于在BoB的潜在生成地点附近观测到的最大振幅（2.5至3.5厘米），例如海湾头部和安达曼-尼科巴（AN）岭的大陆坡。来自高分辨率区域海洋模型的模​​拟也证实了北中部BoB内部存在较大的内潮振幅。我们的研究表明，沿着凹状源（海湾头部和AN Ridge北部的大陆斜坡）产生的内部潮汐汇聚到其震源区，导致潮汐在北中北部放大。还发现该重点区域内的潮汐能量消散率约为其他公海区域内潮能消散率的十倍。