ON THE INTERANNUAL VARIABILITY IN GLOBAL KINETIC ENERGY AT 500hPa AND THE DIFFERENCE IN ENERGY ANOMALIES BETWEEN THE TWO EI NIÑO YEARS OF 1983 AND 1987

Using the materials of 21 kinetic energy items (abbreviated to KED which are incorporated seven latitudinal belts with three primary energy modes, at 500hPa in the whole range of the globe during the 9 years of 1980-1988, the anomaly in kinetic energy for each year is investigaed. The annual anomaly was classified into four grades, i.e. anomalous, subanomalous, fair average anomalous and approximately normal. It is shown that 1983 was the only anomalous year during the nine years studied, but the 1987 El Ninño year and the 1985 La Nina year both belonged to the approximately normal one. So, there are great differences in the grade of the energy anomaly between the two El Ninño years during eighties. The main KEIs by which the anomalies were characterized during the three event years, all are very high lag-cross correlation coefficients with SSTA in the equatorial eastern Pacific. It is shown that the anomalies of these KEIs responded to the three events. Besides, it is also shown that the northern subtropical jet is a sensitive region to respond to the SSTA. In responses to the three events there were three different typical character in the subtropical jet.