A.B. Polonsky1,2,3, A.N. Serebrennikov1
1Institute of Natural and Technical Systems, RF, Sevastopol
E-mail: firstname.lastname@example.org; email@example.com
2Branch of Moscow State University in Sevastopol, RF, Sevastopol
3Sevastopol State University, RF, Sevastopol
The article presents data on the interannual variability of the wind field, geostrophic currents and the Black Sea level based on satellite data from the 80s of the 20th century to 2017. It is shown that in the last 20–30 years there has been intensification of atmospheric circulation and an increase in the vorticity of the wind field. According to the data obtained over the past 8 years the interannual variability of the wind speed module has had a slight positive linear trend, For six months of the warm period of the year (from March to September), the standard deviation (SD) of interannual variability is about 0.7 m / s and its value is evenly distributed throughout the basin. In these months, the minimum average climatic values of the surface wind speed module are also observed. In the cold period of the year, not only the average wind speed increases, but also its interannual fluctuations, with the maximum values of SD observed in the western part of the sea. The vorticity is intensified both due to an increase in the wind speed and due to changes in the structure of the wind field. Surface geostrophic currents calculated from the sea level anomalies and standard ratios of the geostrophic theory are characterized by maximum interannual variability in the vicinity of the Main Black Sea Current in the southeastern, northeastern, and northwestern parts of the sea. Typical interannual variations in geostrophic currents are presented here at about 7 cm / s. Long-term trends in the speed of geostrophic currents on the sea surface are insignificant. The rate of rise of the Black Sea level, averaged over the entire period of satellite observations, is about 2 mm / year, i.e. it is close to typical growth rate in the oceans.
Keywords: interannual variability and trends in the fields of wind and geostrophic currents of the Black Sea, trends in sea level changes.
LIST OF REFERENCES:
- Repetin L. N., Belokopytov V. N. Wind Regime over the coast and shelf of the North-Eastern part of the Black Sea // Nauk. Pratsi Ukrndmi, 2008, Vol. 257. P. 84 to 104.
- Polonsky A. B., Serebrennikov A. N. On low-frequency variability of wind fields and geostrophic currents of the Black sea based on satellite data. Part 1: seasonal cycle // Monitoring systems of environment. Sevastopol: INTS. Vol. 2 (36). 2019. P. 64-72.
- Climate changes in the wind speed module in the region of the East coast of the Black sea / E. A. Kostyanaya, I. V. Serykh, A. G. Kostyanaya [et al.] / / Vestnik TvSU. A series of “Geography and Ecology”. 2018. №3. P. 79-98.
- Novikova A. M., Polonsky, A. B. Inter-decadal temperature variability of the surface and cold intermediate layer in the Black sea // Monitoring systems of environment. Sevastopol: INTS. No. 4 (34), 2018. P. 110-115 DOI: 10.33075/2220-5861-2018-4-110-115.
- http://www.remss.com (application date: 14.09.2019)
- Rusu L., Raileanu A.B., Onea F. A comparative analysis of the wind and wave climate in the Black Sea along the shipping routes // Water 2018, 10(7), 924; https://doi.org/10.3390/w10070924.
- Ilyin Y.P. Observed Long-Term Changes in The Black Sea Physical System and Their Possible Environmental Impacts. Towards a “Mediterranization” of the Black Sea? // Physical and Biological Changes, CIESM Workshop Vol. 39, 3–6 June, 2009. Trobzon. Turky. P. 27–43.
- Climate change impacts on wind energy potential in the European domain with a focus on the Black Sea / R. Davy, N. Gnatiuk, L. Pettersson [et al.] // Renewable and Sustainable Energy Reviews. Vol. 81, P. 2. 2018. P. 1652–1659 // https://doi.org/10.1016/j.rser.2017.05.253.
- Southern seas of Russia: climate warming-causes and consequences: review [Electronic resource] // State Oceanographic Institute named after N. N. Zubova. Moscow, 2012, P. 53. URL: http://гоин.рф/index.php/component/jdownloads/finish/11/209.
- Mikhailova E. N., Polonsky A. B., Shokurova I. G. On the relationship of the intensity of circulation in the Black sea with the vorticity of the wind field // Ukrainian hydrometeorological journal. 2013. № 12. P. 193-203.
- Polonsky A. B., Voskresenskaya E. N., Bardin M. Yu. About the features of cyclogenesis in the black sea region. // Marine hydrophysical journal. 2007. No. 6. P. 47-58.
- Latysheva I. V., Loshchenko K. A., Shakhaeva E. V. Study of the dynamics of the Asian anticyclone and cold circulation periods on the territory of the Irkutsk region / / series “earth Sciences”. 2011. Vol. 4, no. 2. P. 161-171.
- Polonsky A. B., Shokurova I. G. Long-Term variability of vorticity of tangential wind friction stress in the Black sea / / Ecological safety of coastal and shelf zones and integrated use of shelf resources. Sevastopol: EKOSI-Hydrophysics. 2011. Vol. 24. P. 182-189.
- Avsar N.B., Jin S., Kutoglu S.H. Recent sea level changes in the Black Sea from satellite gravity and altimeter mesurements // The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XLII-3/W4. 2018.
- Kara A.B., Barron C.N., Wallcraft A.J. Interannual Variability of Sea Surface Height over the Black Sea: Relation to Climatic Patterns // Institute of Marine Sciences, Middle East Technical University, Erdemli, Icel, Turkey. 2008. DOI: 10.1175/2008EI259.1.