The article presents the results from a research project investigating acoustic climate changes in the Gdansk Deep based on data extending from 1902 to 2019. This part of the southern Gotland Basin, is rarely discussed in the scientific literature.

The speed of sound in the seawater is a function of temperature, salinity, and depth. In such shallow sea as Baltic Sea, the impact of depth is not substantial. The other two factors shape the hydroacoustic conditions. In the upper layer of seawater, the dominating factor is heat exchange at the water-atmosphere interface. The observed climate warming is reflected in the water temperature rise, which results in an increased speed of sound in the upper water layer. After years of sporadic salty inflows from the North Sea, the frequency of the phenomenon has increased since 2014. As a result, the salinity at the bottom exceeds values typical for that area.

本文介绍了一项研究项目的结果，该项目基于1902年至2019年的数据调查了格但斯克深部的声学气候变化。科学文献很少讨论哥得兰盆地南部的这一部分。

海水中的声速是温度，盐度和深度的函数。在波罗的海这样的浅海中，深度的影响并不大。另外两个因素决定了水声条件。在海水的上层，主要因素是水-大气界面处的热交换。观测到的气候变暖反映在水温上升中，这导致上部水层中的声音速度增加。自从北海经过数年零星的咸水流入后，自2014年以来，这种现象的发生频率增加了。结果，底部的盐度超过了该地区的典型值。