Distance-time autocorrelation functions have been fitted to zonal and meridional correlation coefficients of wind from 51 station pairs over Australia for time lags up to 24 hours, at 500 and 200 mb in summer and winter. Functions based on geostrophic flow in a horizontally homogeneous and isotropic atmosphere explain about 85 per cent of the data variance, although some systematic discrepancies are apparent. The centres of maximum correlation move at a velocity much less than that predicted by frozen turbulence, and the meridional maximum decreases more rapidly with increasing lag than does the zonal maximum. The functions indicate a systematic variation of this velocity with season and latitude, but not with level.
R. S. Seaman (Sun,) studied this question.