Lagrangian velocity correlations and absolute dispersion in the midlatitude troposphere

In particular, the velocity field is decomposed into time mean and transient (or eddy) components to better understand the nature of the LVCFs. A closely related quantity, the absolute dispersion (AD), is also examined.', Given the anisotropy of the flow, meridional and zonal characteristics are considered separately.

The zonal LVCF is seen to be nonexponential. In fact, for intermediate time scales it can either be interpreted as a power law of the form T-alpha With 0 < a < I or as the sum of exponentials with differing time scales-both interpretations being equivalent. More importantly the long time correlations in the zonal flow result in a superdiffusive zonal AD regime.