The Study of Sensitivity of the Black Sea Hydrophysical Fields Reanalysis Results to the Applied Atmospheric Forcing

L.I. Sukhikh✉, V.L. Dorofeyev

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

✉ e-mail: l.sukhikh@gmail.com

Abstract

The results of two reanalyzes of the Black Sea hydrophysical fields based on the remote sensing data (2000–2012) assimilation are compared. The simulations are carried out using different arrays of the atmospheric fields, namely ERA-Interim and ММ5.

It is shown that the results of both computations are quite close due to significant impact of the assimilated data. At the same time, there are some differences in the temperature, salinity and current fields. In particular, it is shown that temperature difference in the subsurface layer of the Black Sea is caused by the corresponding difference of the heat fluxes on the free sea surface in the atmospheric data. At that, salinity difference in the subsurface layer is to a greater extent determined by the difference of the wind stress vorticity than by the fresh water fluxes through the sea surface. It is shown that the currents simulated using the _MM_5 atmospheric data are more intensive, especially for the time scales shorter than a month. It is stipulated by a better spatial-temporal resolution of the _MM_5 fields. This difference in the current intensity is mainly due to the wind stress field. In both calculations the basic contribution to the vertical circulation cell formation in the Black Sea upper layer is done by wind forcing.

Keywords

reanalysis, the Black Sea dynamics, numerical modeling, data assimilation, remote sensing

For citation

Sukhikh, L.I. and Dorofeyev, V.L., 2016. The Study of Sensitivity of the Black Sea Hydrophysical Fields Reanalysis Results to the Applied Atmospheric Forcing. Physical Oceanography, (5), pp. 45-60. doi:10.22449/1573-160X-2016-5-45-60

DOI

10.22449/1573-160X-2016-5-45-60

References

  1. Knysh, V.V., Korotaev, G.K. & Moiseenko V.A. [et al.], 2011, “Sezonnaya i mezhgodovaya izmenchivost' gidrofizicheskikh poley Chernogo morya, vosstanovlennykh na osnove reanaliza za period 1971 – 1993 [Seasonal and interannual variability of Black Sea hydrophysical fields reconstructed from 1971–1993 reanalysis data]”, Izv. RAN. Fizika atmosfery i okeana, vol. 47, no. 3, pp. 433-446 (in Russian).
  2. Knysh, V.V., Kubryakov, A.I. & Moiseenko V.A. [et. al], 2008, “Tendentsii v izmenchivosti termokhalinnykh i dinamicheskikh kharakteristik Chernogo morya, vydelennye po rezul'tatam reanaliza za period 1985 – 1994 [Trends in the Black Sea thermohaline and dynamic variability defined by the results of reanalysis for 1985 – 1994 period]”, Ekologicheskaya bezopasnost' pribrezhnoy i shel'fovoy zon i kompleksnoe ispol'zovanie resursov shel'fa, Sevastopol, ECOSI-Gidrofizika, iss. 16, pp. 279-290 (in Russian).
  3. Knysh, V.V., Korotaev, G.K. & Mizyuk, A.I. [et al.], 2012, “Usvoenie gidrologicheskikh nablyudeniy dlya rascheta techeniy v moryakh i okeanakh [Assimilation of hydrological observation data for calculating currents in seas and oceans]”, Ibid., vol. 48, no. 1, pp. 67-85 (in Russian).
  4. Dorofeev, V.L., Sukhikh, L.I., 2016, “Analiz izmenchivosti gidrofizicheskikh poley Chernogo morya v period 1993-2012 godov na osnove rezul'tatov vypolnennogo reanaliza [Analysis of Variability of the Black Sea Hydrophysical Fields in 1993 – 2012 Based on the Reanalysis Result]”, Morskoy gidrofizicheskiy zhurnal, no. 1, pp. 33-48 (in Russian).
  5. Demyshev, S.G., Korotaev, G.K., 1992, “Chislennaya energosbalansirovannaya model' baroklinnykh techeniy okeana s nerovnym dnom na setke C [Numerical energy-balanced model of baroclinic currents in the ocean with bottom topography on the C-grid]”, Chislennye modeli i rezul'taty kalibrovochnykh raschetov techeniy v Atlanticheskom okeane, Moscow, IVM RAN, pp. 163-231 (in Russian).
  6. Korotaev, G.K., Oguz, T. & Dorofeyev, V.L. [et al.], 2011, “Development of Black Sea nowcasting and forecasting system”, Ocean Sci., vol. 7, no. 5, pp. 1-21.
  7. Shokurov, M.V., 2011, “Chislennoe modelirovanie atmosfernoy tsirkulyatsii nad Chernym morem [Numerical simulation of atmospheric circulation over the Black Sea]”, Ekologicheskaya bezopasnost' pribrezhnoy i shel'fovoy zon i kompleksnoe ispol'zovanie resursov shel'fa, Sevastopol, ECOSI-Gidrofizika, iss. 25, vol. 2, pp. 91-113 (in Russian).
  8. Dorofeev, V.L., 2004, “Assimilyatsiya sputnikovykh izmereniy poverkhnostnoy temperatury Chernogo morya v modeli tsirkulyatsii [Assimilation of remote sensings of the Black Sea surface temperature in the circulation model]”, Ibid., iss. 11, pp. 24-30 (in Russian).
  9. Korotaev, G.K., Saenko, O.A. & Koblinskiy, Ch.Zh. [et. al], 1998, “Tochnost', metodologiya i nekotorye rezul'taty assimilyatsii al'timetricheskikh dannykh TOPEX/POSEIDON v modeli obshchey tsirkulyatsii Chernogo morya [Accuracy, methodology and some results of TOPEX/POSEIDON altimetry data assimilation in the model of the Black Sea general circulation]”, Issledovanie Zemli iz kosmosa, no. 3, pp. 3-17 (in Russian).
  10. Dorofeev, V.L., Korotaev, G.K., 2004, “Assimilyatsiya dannykh sputnikovoy al'timetrii v vikhrerazreshayushchey modeli tsirkulyatsii Chernogo morya [Assimilation of the satellite altimetry data in the eddy resolved model of the Black Sea circulation]”, Morskoy gidrofizicheskiy zhurnal, no. 1, pp. 52-68 (in Russian).
  11. Gertman, I.F., 1991, “Termokhalinnaya struktura vod morya [The thermohaline structure of the sea waters]”, Gidrometeorologiya i gidrokhimiya morey SSSR. T. IV. Chernoe more. Vyp. 1. Gidrometeorologicheskie usloviya, St. Petersburg, Gidrometeoizdat, vol. 4, iss. 1, pp. 146-195 (in Russian).
  12. Ovchinnikov, I.M., Popov, Yu.I., 1984, “K voprosu o formirovanii kholodnogo promezhutochnogo sloya v Chernom more [On the formation of the cold intermediate layer in the Black Sea]”, Dokl. AN SSSR, vol. 279, no. 4, pp. 986-989 (in Russian).
  13. Blatov, A.S., Bulgakov, N.P. & Ivanov, A.N., [et al.], 1984, “Izmenchivost' gidrofizicheskikh poley Chernogo morya [Variability of the hydrodynamical fields in the Black Sea]”, St. Petersburg, Gidrometeoizdat, 240 p. (in Russian).
  14. Oguz, T., Besiktepe, S., 1999, “Observations on the Rim Current structure, CIW formation and transport in the western Black Sea”, Deep-Sea Res., vol. 46, no. 10, pp. 1733-1753.
  15. Korotaev, G., Oguz, T. & Nikiforov, A. [et al.], 2003, “Seasonal, interannual, and mesoscale variability of the Black Sea upper layer circulation derived from altimeter data”, J. Geophys. Res., vol. 108, no. C4, 3122, pp. 1-15.
  16. Zhurbas, V.M., Zatsepin, A.G. & Grigor'eva, Yu.V. [et. al], 2003, “Tsirkulyatsiya vod i kharakteristiki raznomasshtabnykh techeniy v verkhnem sloe Chernogo morya po drifternym dannym [Circulation of waters and characteristics of different-scale currents in the Black Sea upper layer according to drifter data]”, Okeanologiya, vol. 43, no. 6, pp. 1-15 (in Russian).

Download the article (PDF)