Abstract

The vertical distribution of temperature (T), salinity (S), dissolved oxygen (O₂) concentration, flow velocity (U) in the underwater canyon over the gas seepage site in the Golubaya Bay (the Black Sea) is studied. A significant decrease in the O₂ concentration in the bottom water layer over the seep site as compared to the background site is shown, with a minimum of 0.2 mg/L, which was kept during the entire measurement period. The minima at the bottom were also revealed in the distribution of salinity in the first dataset; in the second dataset, desalination lenses were registered at a depth of 4, 10, and 8 m for three consecutive soundings. Such distribution potentially indicates a pulsed freshwater discharge, during which the desalination lenses gradually rise to the surface. The bottom current in the canyon was on average two times weaker than at the background station, where its velocity varied within 0.04–0.09 m/s. The described features of the distribution of hydrological parameters are associated with the gas bubble seepage and geomorphology of the study area.

中文翻译：

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Golubaya 湾（黑海）甲烷渗漏现场的水文参数分布：与海底淡水排放的联系

摘要

研究了Golubaya湾（黑海）气体渗漏现场水下峡谷温度（T）、盐度（S）、溶解氧（O ₂）浓度、流速（U ）的垂直分布。_{O 2}显着减少 显示了渗漏部位底部水层与背景部位相比的浓度，最小值为 0.2 mg/L，在整个测量期间保持不变。底部的最小值也显示在第一个数据集中的盐度分布中；在第二个数据集中，海水淡化透镜在 4、10 和 8 m 的深度进行了三个连续探测。这种分布潜在地表明了脉冲淡水排放，在此期间，海水淡化透镜逐渐上升到表面。峡谷底部电流平均比背景站弱两倍，其速度在 0.04-0.09 m/s 范围内变化。所描述的水文参数分布特征与研究区的气泡渗流和地貌有关。