A.S. Lubkov, E.N. Voskresenskaya, O.V. Marchukova, V.Y. Zhuravsky
Institute of Natural and Technical Systems, Russian Federation, Sevastopol, Lenin St., 28
UDC 551.465.635, 551.555.1, 551.465.7
The article focuses on studying manifestations of two El Niño types (eastern and central) in the meteorological anomalies in the Black Sea region. Using data sets on the sea level pressure and air temperature from the 20th Century Reanalysis V2c with the space resolution 2° × 2°during the period 1870 – 2018 the monthly composite anomalies of the studied parameters associated to each El-Nino type are estimated. The features of statistically significant manifestations of eastern and central El-Niño events are described.
It is shown that eastern El-Niño is characterized by positive air temperature anomalies in February, July and October reaching 2 °С which is higher than monthly norm. These temperature conditions are accompanied by associated negative sea level pressure anomalies having the minimum value of about 3 mb in February. At the same time central El-Niño type is manifested as monthly anomalous air temperature decrease up to –2 ° С over the most of the Black sea region in December and positive temperature anomalies up to 2° С in the central part in February. Simultaneously the negative air temperature anomalies up to –1, 5°С are typical for April and up to –2°С for October. This is accompanied by associated conditions in the sea level pressure field.
Keywords: El-Niño, El-Niño – South Oscillation, ENSO, types of El-Niño, the Black Sea region, climate manifestations.
LIST OF REFERENCES
- McPhaden M.J., Zebiak S.E. Glantz M.H. ENSO as an integrating concept in Earth science // Science. 2006. V. 314. № P. 1740–1745.
- Rasmusson E.M., Wallace J.M. Meteorological aspects of El Nino/Southern Oscillation // Science. 1983. V. 222. № P. 1195–1202.
- Fu C.B. The two sea surface temperature warming patterns during El Nino (in Chinese) // Chin Sci Bull. 1985. № P. 596–599.
- El-Nino Modoki and its possible teleconnection / K. Ashok, S.K. Behera, S.A. Rao [et al.] // J Geophys Res. 2007. № C11007.
- Larkin N.K., Harrison D.E. Global seasonal temperature and precipitation anomalies during El Nino autumn and winter // Geophys Res Lett. № 32. L13705.
- Fu C.B., Diaz H., Fletcher J. Characteristics of the response of sea surface temperature in the central Pacific associated with the warm episodes of the Southern Oscillation // Mon Weather Rev. 1986. № P. 1716–1738.
- Lin X.C., Yu S.Q. El Nino and rainfall during the flood season (June-August) in China (in Chinese) // Acta Meteorol Sin. 1993. № P. 434–441.
- Yuan Y., Yang H., Li C.Y. Study of El Nino events of different types and their potential impact on the following summer precipitation in China (in Chinese) // Acta Meteorol Sin. 2012. № P. 467–478.
- Yuan Y., Yang S. Impacts of different types of El Nino on the EastAsian climate: Focus on ENSO Cycles // J Clim. doi: 10.1175/ JCLI-D-11-00576.1
- Kug J.S., Jin F.F., An S.I. Two types of El Nino events: Cold tongue El Nino and warm pool El Nino // J Clim. 2009. № P. 1499–1515.
- El Nino in a changing climate / S.W. Yeh, J.S. Kug, B. Dewitte [et al.] // Nature. 2009. № P. 511–514.
- Impacts of recent El Niño Modoki on dry/wet condidions in the Pacific rim during boreal summer / H. Weng, K. Ashok, S.K. Behera [et al.] // Climate Dynamics. №29. P. 113–129.
- Voskresenskaya E. N., Mikhailova N. V. Classification of El Nino events and weather and climate anomalies in the black sea region. NAS of Ukraine. 2010. No. 3. P. 124-130.
- Kuzminsky, G. G. The Black sea. Krasnodar: Book publishing house. 1977. P. 96.
- Voskresenskaya E.N., Kovalenko O.Y. Anticyclone activity over the Mediterranean-Black sea region: trends and variability // Quanternary International. V. 409. P. 70–74.
- Lubkov A. S., Voskresenskaya E. N., Marchukova O. V. Objective classification of El Nino phenomena // Use and protection of natural resources in Russia: NIA-Nature, 2017, No. 1 (149), P. 41-44.
- Gordeeva S. M. Statistical methods of processing and analysis of hydrometeorological information: a workshop on the discipline. Saint Petersburg: RGGMU. 2010. P. 74.