Technique of the Black Sea Temperature and Salinity Measurement Data Analysis Using Dynamic Altimetry Level

G.K. Korotaev✉, P.N. Lishaev, V.V. Knysh

Marine Hydrophysical Institute, Russian Academy of Sciences, Sevastopol, Russian Federation

✉ e-mail: gkorotaev@gmail.com

Abstract

Original technique of combined analysis of temperature and salinity measurements and altimetry observations in the Black Sea is proposed. The technique essence consists in constructing (on the chosen horizons) the diagrams of empirical relationships between the integer sea level bins and the corresponding monthly average salinity and temperature values taken from the area bounded by the 500 m isobath. Such a technique permits to mark out contribution of adiabatic processes to deformation of temperature and salinity profiles. At that salinity and temperature profiles corresponding to a zero sea level bin represent an unperturbed state. The constructed in such a way (at a zero sea level) monthly average profiles of undisturbed seawater temperature and salinity are analyzed. Diagrams of seasonal and monthly average salinity profiles in 0 – 300 m layer indicates the seawater desalination in the upper 0 – 50 m layer by the end of the 1993 – 2002 period. Interannual variability of monthly average temperature profiles shows decrease of cold intermediate layer thickness. Analysis of T, S-curves of different sea level bins reveals the fact that the profiles of temperature and salinity measured at the stations, regardless of their spatial position and time of execution, converge in 100 – 1200 m layer. This layer corresponds to intermediate water mass of the Black Sea. The given fact indicates predominant role of adiabatic processes on the selected depths.

Keywords

zero sea level bin, adiabatic processes, monthly average salinity (temperature) profile, low salinity of water, thickness of cold intermediate layer, T, S-curves

For citation

Korotaev, G.K., Lishaev, P.N. and Knysh, V.V., 2015. Technique of the Black Sea Temperature and Salinity Measurement Data Analysis Using Dynamic Altimetry Level. Physical Oceanography, (2), pp. 24-38. doi:10.22449/1573-160X-2015-2-24-38

DOI

10.22449/1573-160X-2015-2-24-38

References

  1. AVISO – Archivage Validation Interprétation des données des Satellites Océanographiques, http://www.aviso.oceanobs.com/.
  2. Kubryakov, A.A., Stanichny, S.V. 2013, “Estimating the quality of the retrieval of the surface geostrophic circulation of the Black Sea by satellite altimetry data based on validation with drifting buoy measurements”, Izvestiya. Atmos. Ocean. Phys., vol. 49, no. 9, pp. 930-938.
  3. Le Traon, P. Y., Dibarboure, G. & Ducet, N. 2002, “Use of a high-resolution model to analyze the mapping capabilities of multiple-altimeter missions”, J. Atmos. Ocean. Technol., no. 18, pp. 1277-1288.
  4. Pascual, A., Faugère, Y. & Larnicol, G. [et al.]. 2006, “Improved description of the ocean mesoscale variability by combining four satellite altimeters”, Geophys. Res. Lett., no. 33, L02611.
  5. Korotayev, G.K., Knysh, V.V. & Mizyuk, A.I. 2010, “Avtomodel'noe formirovanie psevdopoley nablyudeniy plotnosti (solenosti, temperatury) Chernogo morya dlya resheniya zadachi re-analiza gidrofizicheskikh poley (model'nye chislennye eksperimenty) [Automodel formation of the Black Sea density (salinity and temperature) observation pseudo-fields to solve the problem of the re-analysis of the hydrophysical fields (model numerical experiments)]”, Ekologicheskaya bezopasnost' pribrezhnoy i shel'fovoy zon i kompleksnoe ispol'zovanie resursov shel'fa, Sevastopol, EKOSI-Gidrofizika, vol. 22, pp. 7-21 (in Russian).
  6. Mizyuk, A.I., Knysh, V.V. & Korotayev G.K. 2011, “Metodika vosstanovleniya gidrofizicheskikh poley Chernogo morya v period 2007 – 2008 gg. na osnove assimilyatsii v modeli dannykh izmereniy buev-profilemerov [Renovation technique of the Black Sea hydrophysical fields in 2007 – 2008 period based on the assimilation in the model of data measurement of profiling floats]”, Ekologicheskaya bezopasnost' pribrezhnoy i shel'fovoy zon i kompleksnoe ispol'zovanie resursov shel'fa, Sevastopol, EKOSI-Gidrofizika, vol. 24, pp. 38-55 (in Russian).
  7. Belokopytov, V.N., Bagaev, A.V. 2012, “Statisticheskiy analiz termokhalinnykh poley Chernogo morya po dannym buev-profilemerov ARGO [Statistical analysis of the Black Sea thermohaline fields under the data of ARGO profiling floats]”, Ekologicheskaya bezopasnost' pribrezhnoy i shel'fovoy zon i kompleksnoe ispol'zovanie resursov shel'fa, Sevastopol, EKOSI-Gidrofizika, vol. 26, pp. 128-142 (in Russian).
  8. Bagaev, A.V., Korotaev, G.K. & Demyshev, S.G. [et al.]. 2011, “Sopostavlenie rezul'tatov modeliro-vaniya termokhalinnykh poley Chernogo morya s dannymi buev-profilemerov ARGO [Association of the results of the Black Sea thermohaline fields with the data of ARGO profiling floats]”, Ekologicheskaya bezopasnost' pribrezhnoy i shel'fovoy zon i kompleksnoe ispol'zovanie resursov shel'fa, Sevastopol, EKOSI-Gidrofizika, vol. 24, pp. 78-90 (in Russian).
  9. Knysh, V.V., Kubryakov, A.I. & Inyushina, N.V. [et al.]. 2008, “Vosstanovlenie klimaticheskoy sezonnoy tsirkulyatsii Chernogo morya na osnove modeli v σ-koordinatakh s ispol'zovaniem assimilyatsii dannykh o temperature i solenosti [The Black Sea seasonal climatic circulation renewal based on the model in σ-coordinates applying temperature and salinity data assimilation]”, Ekologicheskaya bezopasnost' pribrezhnoy i shel'fovoy zon i kompleksnoe ispol'zovanie resursov shel'fa, Sevastopol, EKOSI-Gidrofizika, vol. 16, pp. 243-265 (in Russian).
  10. Titov, V.B. 2000, “Formirovanie zimney gidrologicheskoy struktury Chernogo morya v zavisimosti ot surovosti zim [Dependence of the Formation of the Winter Hydrological Structure in the Black Sea on the Severity of Winter Conditions]”, Okeanologiya, vol. 40, no. 6, pp. 826-832 (in Russian).
  11. Titov, V.B., Savin, M.T. 2000, “Ob otsenke temperaturnogo rezhima atmosfery, formiruyushchego gidrologicheskuyu strukturu Chernogo moray [Estimation of atmospheric temperature regime forming the hydrological structure of the Black Sea]”, Meteorologiya i gidrologiya, no. 10, pp. 78-84 (in Russian).
  12. Titov, V.B. 2003, “Vliyanie mnogoletney izmenchivosti klimaticheskikh usloviy na gidrologicheskuyu strukturu i mezhgodovoe obnovlenie kholodnogo promezhutochnogo sloya v Chernom more [Effect of multiannual variability of climatic conditions on the hydrological structure and interannual renewal of the cold intermediate layer in the Black Sea]”, Okeanologiya, vol. 43, no. 2, pp. 176-184 (in Russian).
  13. Staneva, J.V., Stanev, E.V. 2002, “Water mass formation in the Black Sea during 1991-1995”, J. Mar. Syst., no. 32, pp. 199-218.
  14. Stanev, E.V., Bowman, M.J. & Peneva, E.L. [et al.]. 2003, “Control of Black Sea intermediate water mass formation by dynamics and topography: Comparison of numerical simulations, surveys and satellite data”, J. Mar. Res., no. 61, pp. 59-99.
  15. Oguz, T., Dippner, J.W. & Kaymaz, Z. 2006, “Climatic regulation of the Black Sea hydrometeorological and ecological properties at interannual-to-decadal time scales”, J. Mar. Syst., vol. 60, iss. 3-4, pp. 235-254.
  16. Shokurova, I.G. 2010, “Dolgovremennaya izmenchivost' gidrologicheskikh poley i geostroficheskoy tsirkulyatsii v Chernom more [Long-period variability of hydrologic fields and geostrophic circulation in the Black Sea]”, PhD Thesis, Sevastopol, MGI NAN Ukrainy, 176 p. (in Russian).
  17. Polonsky, A.B., Shokurova, I.G. & Belokopytov, V.N. 2013, “Desyatiletnyaya izmenchivost' temperatury i solenosti v Chernom more [Decadal variability of temperature and salinity in the Black Sea]”, Morskoy gidrofizicheskiy zhurnal, vol. 6, pp. 27-40 (in Russian).
  18. Leonov, A.K. 1960, “Regional'naya okeanografiya. Chast' 1. Beringovo, Okhotskoe, Yaponskoe, Kaspiyskoe i Chernoe morya”, Leningrad, Gidrometeoizdat, 765 p. (in Russian).
  19. Ivanov, V.A., Belokopytov, V.N. 2011, “Okeanografiya Chernogo morya”, Sevastopol, EKOSI-Gidrofizika, 209 p. (in Russian).
  20. Polonskii, A.B., Popov, Yu.I. 2011, “Usloviya formirovaniya vod kholodnogo promezhutochnogo sloya Chernogo morey [Formation conditions of the Black Sea intermediate cold layer waters]”, Seriya: Sovremennye problemy okeanologii, EKOSI-Gidrofisika, iss.8, 54 p. (in Russian).

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