Action of cabbeling-anticabbeling effect in formation of the halocline in estuaries on example of the Razdolnaya River (Peter the Great Bay, Japan Sea)
https://doi.org/10.26428/1606-9919-2023-203-668-675
Abstract
Nonlinearity effect of the seawater density equation for mixing of waters with different salinity is considered for a case of the halocline formation in estuaries. Depending on salinity, density of the mixture can be higher (at low salinity) or lower (at high salinity) than the arithmetic mean density of the two components, so an effect of compaction during mixing (cabbeling) is observed in the upper part of halocline with lower salinity, whereas an effect of decompaction during mixing (anticabbeling) occurs in its lower part with higher salinity. The salinity value at the point of cabbeling change to anticabbeling is calculated that depends on average temperature of the mixed waters. In the real halocline (estuary of the Razdolnaya/Suifen River flowing into Peter the Great Bay, Japan Sea), the highest vertical gradient of salinity is observed along the isohaline, which value changes depending on temperature. In summer, when the water temperature in the estuary is about 22 oC, the maximum gradient is observed at the isohaline 10 psu, while in winter, when the temperature drops to 1 oC, the maximum gradient shifts to the isohaline 18 psu. These isohaline values correspond to the salinity values for the point of cabbeling change to anticabbeling. The cabbeling effect above this level promotes sinking of water, but the anticabbeling effect below this level promotes rising of water. This encountering convergent motion is an additional mechanism of the halocline self-sustaining in sharp state.
Supporting agencies: The study was funded from the budget of Pacific Oceanological Institute, Far-Eastern branch of Russian Ac. Sci., according to the state assignment «Research and monitoring of climatically active substances, phenomena and processes in the Far Eastern Seas and their coastal zones», registration number 122110700009-1. The authors are grateful to the crew and research staff of RV Malakhit (Far-Eastern branch of Russian Ac. Sci.) and personally to A.F. Sergeev for opportunity to use the oceanographic data collected in the 2014 cruise.
About the Authors
T. R. Kilmatov
Pacific Oceanological Institute, Russian Ac. Sci.; Maritime State University
Russian Federation
Russian Federation
Talgat R. Kilmatov, D.Phys.-Math., professor
43, Baltiyskaya Str., Vladivostok, 690041
50, Verkhneportovaya Str., Vladivostok, 690003
N. I. Rudykh
Pacific Oceanological Institute, Russian Ac. Sci.
Russian Federation
Russian Federation
Natalia I. Rudykh, Ph.D., senior researcher
43, Baltiyskaya Str., Vladivostok, 690041
References
1. Vazhova, A.S. and Zuenko, Yu.I., Patterns of nutrients distribution along salinity gradient in the estuaries of the rivers Sukhodol and Razdolnaya/Suifen (Peter the Great Bay, Japan Sea), Izv. Tikhookean. Nauchno-Issled. Inst. Rybn. Khoz. Okeanogr., 2015, vol. 180, pp. 226–235. doi 10.26428/1606-9919-2015-180-226-235
2. Kilmatov, T.R., Cabbeling due to mixing of the Bering Strait and the Chukchi Sea waters on seasonal and climatic scale, Izv. Tikhookean. Nauchno-Issled. Inst. Rybn. Khoz. Okeanogr., 2022, vol. 202, no. 2, pp. 409−413. doi 10.26428/1606-9919-2022-202-409-413. EDN: BYSKLT.
3. Kilmatov, T.R. and Kuzmin, V.A., Compaction effect during mixing of sea waters and its seasonal manifestation on the Pacific subarctic front, Izv. Akad. Nauk SSSR, Fizika atmosfery i okeana, 1991, vol. 27, no. 8, pp. 883–887.
4. Semkin, P.Yu., Tishchenko, P.Y., Lobanov, V.B., Barabanshchikov, Yu.A., Mikhailik, T.A., Sagalaev, S.G., and Tishchenko, P.P., Water exchange in the estuary of the Razdolnaya River (Amur Bay, Japan Sea) in the ice covered period, Izv. Tikhookean. Nauchno-Issled. Inst. Rybn. Khoz. Okeanogr., 2019, vol. 196, pp. 123−137. doi 10.26428/1606-9919-2019-196-123-137
5. Tishchenko, P.Ya., Semkin, P.Ju., Tishchenko, P.P., Zvalinsky, V.I., Barabanshchikov, Yu.A., Mikhailik, T.A., Sagalaev, S.G., Shvetsova, M.G., Shkirnikova, E.M., and Shulkin, V.M., Hypoxia of bottom waters of the Razdolnaya River Estuary, Dokl. Earth Sci., 2017, vol. 476, no. 2, pp. 1207–1211. doi 10.1134/S1028334X17100208
6. Foster, T.D., An Analysis of the Cabbeling Instability in Sea Water, J. Phys. Oceanogr., 1972, vol. 2, no. 3, pp. 294–301. doi 10.1175/1520-0485(1972)002<0294:AAOTCI>2.0.CO;2
7. Groeskamp, S., Abernathey, R.P., and Klocker, A., Water mass transformation by cabbeling and thermobaricity, Geophys. Res. Lett., 2016, vol. 43, no. 20, pp. 10,835–10,845. doi 10.1002/2016GL070860
8. Klocker, A. and McDougall, T.J., Influence of the Nonlinear Equation of State on Global Estimates of Dianeutral Advection and Diffusion, J. Phys. Oceanogr., 2010, vol. 40, no. 8, pp. 1690–1709. doi 10.1175/2010JPO4303.1
9. Witte, E., Zur Theorie den Stromkabbelungen, Gaea: Natur und Leben, Cologne, 1902, pp. 484–487.
10. Calculator/salt-water-density. https://www.translatorscafe.com/unit-converter/ru-RU/calculator/salt-water-density/. Cited January 20, 2023.
11. Schlitzer, R., Ocean Data View. Software. URL https://odv.awi.de, 2023.
12. The international thermodynamic equation of Seawater-2010: Calculation and use of thermodynamic properties, Intergovernmental oceanographic Commission, Manuals and Guides, no. 56, UNESCO. http://www.TEOS-10.org/. Cited January 20, 2023.
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For citations:
Kilmatov T.R., Rudykh N.I. Action of cabbeling-anticabbeling effect in formation of the halocline in estuaries on example of the Razdolnaya River (Peter the Great Bay, Japan Sea). Izvestiya TINRO. 2023;203(3):668-675. (In Russ.) https://doi.org/10.26428/1606-9919-2023-203-668-675
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