VARIABILITY OF ATMOSPHERIC AND OCEANIC CHARACTERISTICS IN THE EUROPEAN ATLANTIC REGION IN THE EL NINO AND LA NINA YEARS

E. S. Nesterov

The fields of composite seasonal anomalies of 500-hPa geopotential, pressure and surface air temperature, and sea surface temperature in the European Atlantic region were built for nine most intensive El Nino and nine La Nina events for the period of 1955—1999. For these periods, mean seasonal index valuea of the main oscillations of atmospheric circulation were obtained for the North Atlantic, East Atlantic, and Scandinavian regions and the oscillation of the East Atlantic—Western Russia system. All characteristics are calculated for six seasons, beginning with the wintertime that coincides with the phase of the maximum development of El Nino (La Nina). A combined analysis of composite anomalies and circulation indices allowed one to determine the characteristic features of the evolution of main hydrometeorological fields in the European Atlantic region after the maximum development of El Nino (La Nina).

Joomla templates by a4joomla