ABOUT FINE STRUCTURE AND THE ORIGIN OF THE INTRUSIONS IN THE BLACK SEA

Authors

  • P. A. Stunzhas Shirshov Institute of Oceanology, Russian Academy of Sciences

DOI:

https://doi.org/10.29006/1564-2291.JOR-2019.47(3).13

Keywords:

Black Sea, Bosporus plume, intrusions, temperature, oxygen

Abstract

The process of birth and drift of the Bosporus intrusions as simultaneous temperature and oxygen anomalies in the S-W part of the Black Sea was considered on the basis of data from 2 Argo bio-buoys. The erosion of the amplitude of the anomalies can be traced to a distance of 500 km from the Bosphorus. But in winter, buoys encounter anomalies of temperature and oxygen even further, moreover, both on the periphery of the sea and in the gyres. The parameters of these anomalies are contradictory: increased temperature says that these are Bosphorus intrusions that have been drifting at sea for several months. But they contain up to 20 μM of oxygen in the upper part of the hydrogen sulphide zone, which according to previous data has a life time in such conditions of only about 1 week. This implies local formation of anomalies due to poorly studied processes of winter subsurface water transfer. The author is inclined in favor of the second reason and calls on other researchers to pay attention to this.The process of birth and drift of the Bosporus intrusions as simultaneous temperature and oxygen anomalies in the S-W part of the Black Sea was considered on the basis of data from 2 Argo bio-buoys. The erosion of the amplitude of the anomalies can be traced to a distance of 500 km from the Bosphorus. But in winter, buoys encounter anomalies of temperature and oxygen even further, moreover, both on the periphery of the sea and in the gyres. The parameters of these anomalies are contradictory: increased temperature says that these are Bosphorus intrusions that have been drifting at sea for several months. But they contain up to 20 μM of oxygen in the upper part of the hydrogen sulphide zone, which according to previous data has a life time in such conditions of only about 1 week. This implies local formation of anomalies due to poorly studied processes of winter subsurface water transfer. The author is inclined in favor of the second reason and calls on other researchers to pay attention to this.

References


  1. Bogdanova A.K. Gidrologija Bosfora i pribosforskogo rajona Chernogo morja. Vodoobmen cherez Bosfor i ego vlijanie na gidrologiju i biologiju Chernogo morja. (Hydrology of the Bosphorus and near-Black Sea region of the Black Sea. Water exchange through the Bosphorus and its influence on the hydrology and biology of the Black Sea). Kiev: “Naukova Dumka”, 1969, pp. 5–121.

  2. Bogdanova A.K. Raspredelenie sredizemnomorskih vod v Chernom more (Distribution of Mediterranean waters in the Black Sea). Okeanologija, 1961, Vol. 1, No. 6, pp. 983–991.

  3. Elkin D.N., Zatsepin A.G., Podymov O.I., and Ostrovskij A.G. Opuskanie vod v jekmanovskom sloe, obrazovannom pribrezhnom daungvellingovym techeniem nad naklonnym dnom. (Lowering the waters in the Ekman layer formed by the coastal dounwelling current over an inclined bottom). Okeanologija, 2017, Vol. 57, No. 4, pp. 531–537.

  4. Falina A., Sarafanov A., Ozsoy E., and Turuncoglu U. Observed basin-wide propagation of Mediterranean water in the Black Sea. J. Geoph. Res.: Oceans, 2017, Vol. 122, No. 4, pp. 1–13, doi:10.1002/2017JC012729.

  5. Fedorov K.N. Tonkaja termohalinnaja struktura vod okeana. (Fine-scale thermohaline structure of ocean waters). Moscow: Gidrometeoizdat, 1976, 184 p.

  6. Glazer B.T., Luther G.W.III, Konovalov S.K., Friederich G.E., Trouwborst R.E., and Romanov A.S. Spatial and temporal variability of the Black Sea suboxic zone. Deep-Sea Res., Part II, 2006, Vol. 53, pp. 1756–1768, doi:10.1016/j.dsr2.2006.03.022.

  7. Konovalov S.K., Luther G.W., Friederich G.E., Nuzzio D.B., Tebo B.M., Murray J.W., Oguz T., Glazer B., Trouwborst R.E., Clement B., and Murray K.J. Lateral injection of oxygen with the Bosporus plume – fingers of oxidizing potential in the Black Sea. Limnol. Oceanogr., 2003, Vol. 48, pp. 2369–2376.

  8. Kubrjakov A.A., Zatsepin A.G., and Stanichnyj S.V. Ob osobennostjah sezonnoj generacii sinopticheskih anticiklonov v Chernom more. Sbornik trudov Mezhdunarodnogo simpoziuma MSP-2018; Institut okeanologii im. P.P. Shirshova RAN, Moskva: IO RAN, 2018, pp. 201–204. (On the features of seasonal generation of synoptic anticyclones in the Black Sea. Proceedings of the International Symposium ICP-2018); Moscow: IO RAN, 2018, pp. 201–204, doi: 10.29006/978-5-9901449-4-1-2018-56.

  9. Latif M. A., Ozsoy E., Oguz T., and Unluata U. Observations of the Mediterranean inflow into the Black Sea. Deep-Sea Res., 1991, Vol. 38, Suppl. 2, pp. S711–S724, doi:10.1016/S0198- 0149(10)80005-6.

  10. Stanev E., Grayek S., Claustre H., Schmechtig C., and Poteau A. Water intrusions and particle signatures in the Black Sea: a Biogeochemical-Argo float investigation. Ocean Dynamics. 2017, Vol. 67, pp. 1119–1136, doi:10.1007/s10236-017-1077-9.

  11. Samodurov A.S. and Ivanov L.I. Processes of ventilation of the Black Sea related to water exchange through the Bosporus. Ecosystem modeling as a management tool for the Black Sea. L.I. Ivanov, T. Oguz – eds. NATO Science. Ser. 2: Environmental security. Dordrecht: Kluver Academic Publishers, 1998, Vol. 47, pp. 221–235.

  12. Stunzhas P.A. Applications of continuous oxygen profiles to redox zone study. Okeanologiya, 2005, Vol. 45, Supplement, pp. 93–100.

  13. Zatsepin A.G. O collapse stratifitsirovannyh pjaten. Doklady Akademii Nauk, (About collapse of stratified spots). Reports of Academia of Science, 1982, Vol. 265, No. 2, pp. 460–463.

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Published

2019-11-06

Issue

Vol. 47 No. 3 (2019): Journal of Oceanological Research

Section

Dedicated to the 90th anniversary of Prof. K.N. Fedorov Ocean physics

License

Transfer of copyrights occurs on the basis of a license agreement between the Author and Shirshov Institute of Oceanology, RAS

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