DATE2022-05-15 15:27:24
TITLECyclones in the Mediterranean Basin as a component of mechanisms in teleconnection schemes
AUTHORSVeronika N. Maslova (1) ,Elena N. Voskresenskaya (1)
  1. 1) Institute Of Natural And Technical Systems, Sevastopol (Russia)
ABSTRACTActivity of synoptic systems (cyclones and anticyclones) is a form of atmospheric circulation in the middle latitudes. In the cold half of the year, cyclones prevail and can lead to extreme precipitation and winds and related dangerous phenomena (floods, landslides, mudslides, storm surges). The temporal variability of cyclones associated with the main fronts in the atmosphere shows quasi-periodic changes of the interannual-decadal scale, which are important for the forecast, associated with the influence of the global climate system in general and the ocean-atmosphere system in particular. The main statistical signals of the ocean-atmosphere interaction processes reflect fluctuations in the intensity and location of large-scale anomalies (centers of action) of atmospheric baric field or sea surface temperature. These centers of anomalies are characterized by the strongest correlation with regional climate anomalies and are considered to be the most active ocean–atmosphere interaction zones. In the atmosphere, they correspond to the semi-permanent pressure Highs and Lows, and in the ocean, they are linked to the regions with the maximum sensible and latent heat fluxes, such as the Gulf Stream region near Newfoundland. These global interaction processes are referred to as teleconnection patterns and are described by simple indices (calculated using spatial correlation analysis or principal component analysis), which can be used as predictors for regional climate anomalies. Teleconnection patterns are associated with the modes of the general atmospheric circulation by influencing its elements, such as the mean flow, baric anomalies, gradients and fronts, synoptic systems, heat and moisture transport, intensity and location of jet stream and storm track. The main North Atlantic teleconnection patterns, according to NOAA Climate Prediction Center (, NOAA Physical Science Laboratory (, NOAA National Climatic Data Center (, are the following atmosphere oscillations: the North Atlantic Oscillation (NAO) and Arctic Oscillation (AO), East Atlantic (EA) pattern, East Atlantic/Western Russia pattern, Scandinavia (SCAND) pattern, Polar/Eurasia pattern, Tropical/Northern Hemisphere (TNH) pattern; and oceanic Atlantic Multidecadal Oscillation (AMO). The aim of the study is to compare the elements of atmospheric circulation, as well as the number and trajectories of cyclones in the Mediterranean Basin for different phases of teleconnection modes over the North Atlantic–European region. The results of the study will show the anomalies of the sea level pressure, 1000 hPa and 500 hPa geopotential height, jet stream, wind vector, temperature and precipitation, storm track over the North Atlantic–European region associated with the positive and negative phases of the main oscillations. Finally, teleconnection schemes will be shown with focus on cyclones in the Mediterranean Basin.