A study of interannual and intraannual tropical atmospheric circulations during northern hemisphere summer.

This thesis contains a study of the interannual and intraannual tropical atmospheric circulations for the Northern Hemisphere summer seasons of IQTU, 1975 and 1976 using satellite observations of infrared radiation and albedo in conjunction with parameters available from conventional 200 mb data. The 200 mb flow regimes are contrasted for the three seasons and power spectra and cross-spectral analysis are used to find significant correlations between the parameters from time series generated within a given area and between the areas. These areas were picked for each parameter to represent regions of maxim.um time-averaged values. The anomalously warm sea surface temperatures in 1976 (Bepristis, 1977) occurred in conjunction with major circulation changes paralleling Bjerknes' (1959) hypothesis and the differences in flow regimes between a normal and dry monsoon season are in general agreement with Kanamitsu and Krishnamurti (1978). Significant correlations were found to exist between parameters within the eastern Pacific and western Pacific and also between these two regions . Particularly strong correlations involved the u², v² and IR parameters