Figure 2.2 Dynamics of the detrended global temperature anomaly (dT) and detrended negative Length of Day (-LOD) (see text for details).The ACI ("zonal" form) has practically no pronounced general trend. Comparison of dT and ACI (Figure 2.3A) shows their close similarity in shape, but ACI runs several years ahead of dT. Shifting the ACI curve by 4 years to the right (Fig 2.3B) results in almost complete coincidence of the curve maximums of the early 1870s, late 1930s, and middle 1990s.