A new `Wavelet Energeti s' te hnique, based on `best-shift' orthonormal wavelet analysis (OWA) of a given instantaneous synopti map, is onstru ted for diagnosing nonlinear kineti -energeti transfers in observed blo king ases. Best-shift analysis represents longitudinal varian e of latitude-mean blo king stru tures at 50 kPa mu h more eÆ iently than does standard OWA, even for stru tures evolvin...