Abstract

The spatiotemporal variability of concentrations and export of inorganic dissolved biogenic elements (nitrogen and phosphorus) in the Yenisei River runoff is assessed. The analysis of changes in phosphate, nitrate, nitrite, and ammonium concentrations in the river water was carried out from the Krasnoyarsk hydroelectric power station tailwater (56° N) to the outlet near Igarka (68° N). The enrichment of the Yenisei water with biogenic substances exported from the Krasnoyarsk Reservoir was found. Among the largest tributaries, the Angara River has the greatest effect on the concentration of inorganic nitrogen and phosphorus in the Yenisei runoff. The spring flood makes the maximum contribution to the annual flux of biogenic elements. The summer-autumn period, despite its duration and significant water discharge, is characterized by the low fluxes of dissolved inorganic nitrogen and phosphorus, which indicates an active participation of biogenic elements in the biogeochemical processes in the Yenisei.

中文翻译：

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叶尼塞河溶解生物元素浓度和通量的变化

摘要

评估了叶尼塞河径流中无机溶解生物元素（氮和磷）的浓度和输出的时空变化。对河水中磷酸盐、硝酸盐、亚硝酸盐和铵盐浓度变化的分析是从克拉斯诺亚尔斯克水电站尾水（北纬 56°）到伊加尔卡附近的出水口（北纬 68°）进行的。发现从克拉斯诺亚尔斯克水库出口的生物物质对叶尼塞河水的富集。在最大的支流中，安加拉河对叶尼塞径流中无机氮和磷浓度的影响最大。春季洪水对生物元素年通量的贡献最大。夏秋时期，尽管持续时间长且排水量很大，