Short-period internal waves on the steep shelf of the Вlack sea in summer 2018

https://doi.org/10.35595/2414-9179-2021-3-27-98-107

View or download the article (Rus)

About the Authors

Elizaveta E. Khimchenko

Shirshov Institute of Oceanology, Russian Academy of Sciences,
Nakhimovskii prospect, 36, 117997, Moscow, Russia;
E-mail: ekhymchenko@gmail.com

Andrey N. Serebryany

Andreyev Acoustics Institute,
Shvernika st., 4, 117036, Moscow, Russia;
E-mail: serebryany@hotmail.com

Anastasia A. Konukhova

Moscow Institute of Physics and Technology (National Research University),
Institutskiy per. 9, 141701, Dolgoprudny, Moscow Region, Russia;
E-mail: konyuhova.aa@phystech.edu

Abstract

The results of the analysis of data on observation of short-period internal waves on the northeastern shelf of the Black Sea in June 2018 are presented. The study area is distinguished by a narrow shelf with a sharp drop in depths, the bottom slope is 23°. The measurements were carried out from the stationary marine platform of The Institute of Ecology of the Academy of Sciences of the Abkhazian Republic, where the depth of the site reaches 13 m. An anchored station was installed, equipped with autonomous point temperature sensors at a depth of 52 m. At the platform, the variability of the sea temperature structure was monitored using point temperature sensors, an autonomous line temperature sensor (LTS), and vertical hourly profiling using a probe. In addition, coastal currents were measured by the acoustic Doppler current profiler ADCP equipped near the platform. As a result of the analysis, a frequent approach of near-inertial internal waves close to the coast was revealed. Trains of short-period internal waves and solitary waves related to the first mode, as well as individual manifestations of internal waves of the second mode, were recorded. Examples of observed waves and their parameters are given. During the entire observation period, internal waves with a period of 5–10 min and a height of 1–2 m were most often recorded. Solitary waves were distinguished by a large period and height. It was found that short-period internal waves at the measurement site are predominantly tied to near-inertial internal waves which approach the coast.

Keywords

short-period internal waves, the Black Sea, shelf.

References

  1. Colosi J.A., Duda T.F., Lin Y.T., Lynch J.F., Newhall A.E., Cornuelle B.D. Observations of sound-speed fluctuations on the New Jersey continental shelf in the summer of 2006. The Journal of the Acoustical Society of America, 2012. V. 131. No. 2. P. 1733–1748.
  2. Denisov D.M., Serebrjanyj A.N. Autonomous internal wave meter based on a distributed temperature sensor. Instruments and experimental techniques, 2019. No. 2. P. 159–160. DOI: 10.1134/S0032816219020058. (in Russian).
  3. Himchenko E.E., Serebrjanyj A.N. Internal waves on the Caucasian and Crimean shelves of the Black Sea (according to summer-autumn observations of 2011-2016). Oceanological research, 2018. V. 46. No. 2. P. 69–87. DOI: 10.29006/1564-2291.JOR-2018.46(2).7 (in Russian).
  4. Ivanov Ju.A., Smirnov B.A., Tareev B.A., Filjushkin B.N. Experimental studies of temperature fluctuations in the sea in the frequency range of internal gravitational waves. Izv. of the USSR Academy of Sciences. Atmospheric and Ocean physics, 1969. V. 5. No. 3. P. 416–425 (in Russian).
  5. Ivanov V.A., Shul’ga T.Ja., Bagaev A.V., Medvedeva A.V., Plastun T.V., Verzhevskaja L.V., Svishheva I.A. Internal waves on the Black Sea shelf in the area of the Heraclea Peninsula: modeling and observation. Marine Hydrophysical Journal, 2019. V. 35. No. 4 (208). DOI: 10.22449/0233-7584-2019-4-322-340 (in Russian).
  6. Jackson C.R., Apel J. An atlas of internal solitary-like waves and their properties. Contract, 2004. Web resource: http://www.internalwaveatlas.com/Atlas2_index.html (accessed 27.04.2021).
  7. Jampol’skij A.D. About internal waves in the Black Sea from observations at a multi-day anchor station. Trudy IOAN SSSR, 1960. V. 39. P. 111–126 (in Russian).
  8. Konjaev K.V., Sabinin K.D. New data on internal waves in the sea obtained using distributed temperature sensors. DAN SSSR, 1973. V. 209. No. 1. P. 86–89.
  9. Krasnoborod’ko O.Ju. Internal waves in the offshore zone of Morocco in the autumn periods of 2015 and 2019. Trudy AtlantNIRO, 2020. V. 4. No. 2 (10). Kaliningrad: AtlantNIRO. P. 43–57 (in Russian).
  10. Lavrova O., Mityagina M. Satellite Survey of Internal Waves in the Black and Caspian Seas. Remote Sensing, 2017. V. 9. No. 9. P. 892. DOI: 10.3390/rs9090892.
  11. Serebrjanyj A.N., Ivanov V.A. Studies of internal waves in the Black Sea from the MGI oceanographic platform. Fundamental and applied hydrophysics, 2013. V. 6. No. 3. P. 34–45 (in Russian).
  12. Serebryany A., Khimchenko, E., Popov, O., Denisov, D., Kenigsberger, G. Internal Waves Study on a Narrow Steep Shelf of the Black Sea Using the Spatial Antenna of Line Temperature Sensors. Journal of Marine Science and Engineering, 2020. V. 8. No. 11. P. 833. DOI: 10.3390/jmse8110833.
  13. Shea R.E., Broenkow W.W. The role of internal tides in the nutrient enrichment of Monterey Bay, California. Estuarine, Coastal and Shelf Science, 1982. V. 15. No. 1. P. 57–66.
  14. Walter R.K., Phelan P.J. Internal bore seasonality and tidal pumping of subthermocline waters at the head of the Monterey submarine canyon. Continental Shelf Research, 2016. V. 116. P. 42–53. DOI: 10.1016/j.csr.2016.01.015.
  15. Woodson C.B. The fate and impact of internal waves in nearshore ecosystems. Annual Review of Marine Science, 2018. V. 10. P. 421–441. DOI: 10.1146/annurev-marine-121916-063619.

For citation: Khimchenko E.E., Serebryany A.N., Konukhova A.A. Short-period internal waves on the steep shelf of the Вlack sea in summer 2018 InterCarto. InterGIS. GI support of sustainable development of territories: Proceedings of the International conference. Moscow: MSU, Faculty of Geography, 2021. V. 27. Part 3. P. 98–107. DOI: 10.35595/2414-9179-2021-3-27-98-107 (In Russian)