The overflow of bottom waters through the Strait of Denmark to the Atlantic has been investigated. A unique physical and hydrodynamic effect of bottom-water overflow has been found. A large volume of cold mixed water overflows as a lens, which is called a bolus. It is shown that the transversal size of the bolus, limited by the 1.028 g/cm3 isopycnal, is approximately 70 km. Its thickness reaches 300 m. This form of overflow over the sill in the form of a bolus alternates with a period of 5 days with the usual overflow. During the bolus overflow, the maximum velocities are found at the leading front, when the water descends down the sill. Minimum velocities are found in the middle of the bolus, which is caused by widening of the bolus after it passes the narrow part of the strait and widens. Velocities increase again in the rear part of the bolus in the narrows of the strait. We suggest a mechanism of a 5-day variation of the overflow regime, which is governed by internal seiches.

中文翻译：

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从北极到大西洋通过丹麦海峡的底水流的流体动力学

已经调查了底水通过丹麦海峡到大西洋的溢流。已发现底水溢流具有独特的物理和水动力效应。大量的冷混合水作为透镜溢出，称为丸剂。结果表明，受 1.028 g/cm3 等密度限制，团块的横向尺寸约为 70 公里。它的厚度达到300 m。这种形式的溢流以丸剂的形式在门槛上与通常的溢流交替进行 5 天。在团块溢出期间，当水沿着门槛下降时，最大速度出现在前缘。最小速度出现在团块中间，这是团块通过海峡狭窄部分并加宽后变宽造成的。在海峡狭窄处的丸剂后部，速度再次增加。我们提出了一种 5 天的溢出机制变化机制，该机制受内部控制。