Field of the Dissolved Organic Matter Content in the Taganrog Bay (the Sea of Azov)

IF 0.7 Q4 OCEANOGRAPHY Physical Oceanography Pub Date : 2018-12-01 DOI:10.22449/0233-7584-2018-6-501-514
P. Lomakin
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引用次数: 1

Abstract

Based on the actual and climatic oceanological data, the notions on composition of the field of the dissolved organic matter content in the Taganrog Bay, from the Don River mouth to the Azov Sea adjacent water areas are obtained. The features of the natural marginal filter of the Don mouth and the runoff waters in the bay are considered. Significant heterogeneity in the field of the considered characteristic (its concentration exceeds the natural standard in the Don mouth) is revealed, that can probably be a consequence of the dissolved organic matter anthropogenic sources, in other words, waste waters from the settlements. The pronounced frontal section, i. e. a natural marginal filter, was revealed in the field of the dissolved organic matter concentration. It was located along the maritime part of the Don River mouth within the narrow shore strip (its width is approximately 0.5–1.0 miles). Across this natural marginal filter, the dissolved organic matter concentration reduced abruptly towards the open sea. Up to 50% of the dissolved organic matter brought to the marine part of the Don mouth remained on the filter. It is revealed that salinity and the dissolved organic matter content in the marginal filter area are closely bound by the backward correlation dependence with the coefficient -0.87. It is shown that the dissolved organic matter concentration in the Taganrog Bay decreases in the area between the marginal filter and the runoff front from 20 to 3 mg/l, and complete transformation of the bay waters saturated with the dissolved organic matter is observed in the runoff front which, in course of the major part of a year, is located at the bay outlet. Seaward off the front external boundary (isohaline 10 PSU), the fields of salinity and dissolved organic matter content are characterized by spatial homogeneity with the 10-13 PSU salinity and the dissolved organic matter concentration 1-3 mg/l which are typical of the Azov Sea open water areas. It is found that weakly pronounced vertical stratification of the field of the dissolved organic matter concentration is peculiar to all the studied water areas.
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塔甘罗格湾(亚速海)溶解有机物含量场
根据实际和气候海洋学数据,得出了从顿河河口到亚速海邻近水域的塔甘罗格湾溶解有机物含量场的组成概念。考虑了顿河河口天然边缘滤层和海湾径流的特点。所考虑特征领域的显著异质性(其浓度超过了顿口的自然标准)被揭示,这可能是溶解有机物人为来源的结果,换句话说,是定居点的废水。在溶解有机物浓度场中显示了明显的锋面剖面,即自然边缘滤层。它位于狭窄的海岸带内(其宽度约为0.5-1.0英里)的顿河河口的海上部分。通过这个天然的边缘过滤器,溶解的有机物浓度向公海突然降低。被带到顿河河口海洋部分的溶解有机物中,多达50%残留在过滤器上。结果表明,边缘过滤区的盐度和溶解有机物含量之间存在着密切的后向相关性,系数为-0.87。结果表明,Taganrog湾的溶解有机物浓度在边缘滤层和径流前沿之间的区域从20毫克/升下降到3毫克/升,在径流前沿观察到溶解有机物饱和的海湾水域的完全转变,在一年的大部分时间里,径流前沿位于海湾出口。在前部外部边界(等盐10 PSU)附近的海域,盐度和溶解有机物含量场具有空间均匀性,盐度为10-13 PSU,溶解有机物浓度为1-3mg/l,这是亚速海开放水域的典型特征。研究发现,溶解有机物浓度场的弱明显垂直分层是所有研究水域所特有的。
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来源期刊
Physical Oceanography
Physical Oceanography OCEANOGRAPHY-
CiteScore
1.80
自引率
25.00%
发文量
8
审稿时长
24 weeks
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