Seasonal Variations in the Carbonate System of the Razdolnaya River

Tishchenko, P. Ya.; Mikhaylik, T. A.; Pavlova, G. Yu.; Barabanshchikov, Yu. A.; Semkin, P. Yu.

doi:10.1134/s0097807823010165

Cited by 1 publication

(2 citation statements)

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“…The basin discussed in this paper differs from anthropogenically loaded areas, for example, shallow subtropical estuaries [19], heavily polluted European estuaries [57]. Asian estuaries with rapid industrial development at the catchment areas of eutrophic rivers [20][21][22][25][26][27], estuaries in the Russian Far East [23,24], and the heavily polluted estuaries of India [16,28,58]. As a rule, the central issue of these basins is the discussion of their carbonate systems under conditions of ecosystem instability due to anthropogenic eutrophication and, as a consequence, the high pCO 2 levels of their bottom waters and often surface waters.…”

Section: Comparison With Other Coastal Areas and Estuariesmentioning

confidence: 99%

“…Examples of comprehensive studies of the carbon dynamics in estuaries include papers on European estuaries (which can be found in [19]). Recently, in connection with an increasing flux of nutrients within the runoff of many rivers on Asian shores, for example, papers [20][21][22], the carbonate system of coastal waters under anthropogenic eutrophication has been widely discussed [23][24][25][26][27]. Significant daily oscillations of the carbonate system parameters can be caused by tidal water dynamics and, consequently, by the disturbance of bottom sediments and changes in PAR, and, as a result, by variations in the metabolism of phytoplankton [14,19,28].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Carbonate System of Penzhina Bay and the Shelikhov Gulf in the Sea of Okhotsk during Extreme Tides in Summer

Semkin,

Baigubekov,

Barabanshchikov

et al. 2024

JMSE

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Understanding the factors that control carbonate systems is an important goal due to the complex interactions between the hydrophysical and chemical–biological conditions in coastal basins. The results of this paper present the state of the carbonate system in Penzhina Bay and its adjacent waters—the Shelikhov Gulf—in July 2023, during spring tides with 13 m height. The area we studied included the length of the largest river in the region, the Penzhina River, from the peak of its summer flood to its boundary with the Shelikhov Gulf (the Sea of Okhotsk). This unique dynamic basin, with a length of about 800 km, was studied over 17 days. During this period, the entire water column of Penzhina Bay, down to a depth of about 60 m, and the surface water layer of the Shelikhov Gulf were undersaturated in terms of CO2, with low levels relative to those of the atmosphere. To explain this observation, the dissolved oxygen, nutrients in mineral and organic forms, humic substances, chlorophyll a, and photic zone thickness are presented for the entire basin under study, together with its hydrological data. The results of daily observations of the carbonate system at fixed anchorage stations characterize two contrasting regions of Penzhina Bay: one that was more exposed to continental runoff, which had salinity levels in the range of 8.0–21.3 psu during one tidal cycle; the second had smaller variations in salinity in the range of 31.6–32.9 psu during one tidal cycle. This study emphasizes the importance of biological processes and continental runoff on the variability of the carbonate system parameters and CO2 fluxes at a water/atmosphere boundary with extreme tidal conditions in this ecosystem that is barely affected by human activities.

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