Hypoxia of bottom waters of the Razdolnaya River estuary


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The hypoxia of the bottom waters in the Razdolnaya River estuary was observed for the first time in September 2014 during the survey. It is formed as in the seaward part: oxygen is absorbed as a result of destruction of excessive phytoplankton biomass that settles to the bottom and is synthesized on the upper horizon. The high value of primary production in the riverine part of the estuary was caused by the pycnocline formed. Thus, phytoplankton “blooms” above and undergoes destruction beneath the pycnocline. Oxygen is distributed symmetrically in both parts of the estuary with respect to a bar: similar oxygen concentrations, which are maximum on the surface and minimum at the bottom, 300 and <60 μm/L, respectively, are recorded. The anomalies of hydrochemical parameters that have been formed during this process are sharply different in the two parts of the estuary, which most vividly manifests itself in the N/P value and the partial pressure of carbon dioxide pCO2. The causes of this unique situation are discussed.

作者简介

P. Tishchenko

Il’ichev Pacific Oceanological Institute, Far East Branch

编辑信件的主要联系方式.
Email: tpavel@poi.dvoi.ru
俄罗斯联邦, Vladivostok, 690041

P. Semkin

Il’ichev Pacific Oceanological Institute, Far East Branch

Email: tpavel@poi.dvoi.ru
俄罗斯联邦, Vladivostok, 690041

P. Tishchenko

Il’ichev Pacific Oceanological Institute, Far East Branch; Far East Federal University

Email: tpavel@poi.dvoi.ru
俄罗斯联邦, Vladivostok, 690041; Vladivostok

V. Zvalinsky

Il’ichev Pacific Oceanological Institute, Far East Branch

Email: tpavel@poi.dvoi.ru
俄罗斯联邦, Vladivostok, 690041

Yu. Barabanshchikov

Il’ichev Pacific Oceanological Institute, Far East Branch

Email: tpavel@poi.dvoi.ru
俄罗斯联邦, Vladivostok, 690041

T. Mikhailik

Il’ichev Pacific Oceanological Institute, Far East Branch

Email: tpavel@poi.dvoi.ru
俄罗斯联邦, Vladivostok, 690041

S. Sagalaev

Il’ichev Pacific Oceanological Institute, Far East Branch

Email: tpavel@poi.dvoi.ru
俄罗斯联邦, Vladivostok, 690041

M. Shvetsova

Il’ichev Pacific Oceanological Institute, Far East Branch

Email: tpavel@poi.dvoi.ru
俄罗斯联邦, Vladivostok, 690041

E. Shkirnikova

Il’ichev Pacific Oceanological Institute, Far East Branch

Email: tpavel@poi.dvoi.ru
俄罗斯联邦, Vladivostok, 690041

V. Shulkin

Pacific Institute of Geography, Far East Branch

Email: tpavel@poi.dvoi.ru
俄罗斯联邦, Vladivostok, 690041

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