Blocking in the Southern Hemisphere typically occurs at lower latitudes when compared with the Northern Hemisphere. The index follows Tibaldi et al. (1994).
Reference:
Tibaldi, S., E. Tosi, A. Navarra, and L. Pedulli, 1994: Northern and Southern Hemisphere seasonal variability of blocking frequency and predictability. Monthly Weather Review , 122, 1971-2003.
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