Sources of Freshwater Components in Western Part of the Bering Sea According to Isotope (δ18О, δD) Data

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-07-02 DOI:10.1134/s0001437024700036

E. O. Dubinina, S. A. Kossova, A. A. Osadchiev, Yu. N. Chizhova, A. S. Avdeenko

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Abstract

The isotope parameters and sources of freshwater components for the subsurface, intermediate, and deep water of the western Bering Sea were estimated using the isotope (δ¹⁸О, δD) data for 177 seawater samples. We show that subsurface, dichothermal and, partially, intermediate water (<1000 m) are freshened by regional precipitation. For these waters, the next equations of relations between delta and salinity values were obtained: δ¹⁸О = [0.390 ± 0.018]S – 13.521 ± 0.613 and δD = [3.07 ± 0.08]S – 107 ± 2.74. Deeper (1000–2500 m) water is also freshened by precipitation but from the more southern region (≈40°–45° S). The deepest water (2800–4300 m) retain their isotope signal obtained via freshening by Antarctic glacier ice meltwater. The distribution of isotope parameters with the depth shows that vertical mixing at depths of ≈1000–2500 m takes place. This process should influent the redistribution of nutrients, dissolved oxygen, organic matter, and other components in water of the western Bering Sea. The isotope composition of water passing into the Arctic Ocean halocline (S = 33.1) from the Bering Sea are δ¹⁸О = –0.61‰ and δD = –5.4‰.

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根据同位素（δ18О、δD）数据确定的白令海西部淡水成分来源

摘要利用 177 个海水样本的同位素（δ18О、δD）数据，估算了白令海西部的次表层水、中层水和深层水的同位素参数和淡水成分来源。我们的研究表明，次表层水、二热层水和部分中间层水（1000 米）受到区域降水的清新。对于这些海水，我们得到了δ值与盐度值之间的关系式：δ18О = [0.390 ± 0.018]S - 13.521 ± 0.613，δD = [3.07 ± 0.08]S - 107 ± 2.74。更深（1000-2500 米）的海水也受到降水的清新，但来自更南部地区（≈40°-45° S）。最深的水（2800-4300 米）则保留了通过南极冰川冰融水清新获得的同位素信号。同位素参数随深度的分布表明，在深度≈1000-2500 米处发生了垂直混合。这一过程应该会影响白令海西部海水中营养物质、溶解氧、有机物和其他成分的重新分布。从白令海进入北冰洋卤化线（S = 33.1）的水的同位素组成为δ18О = -0.61‰和δD = -5.4‰。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.