Ah, e comunque la MJO e' abitualmente forte durante la Nina:

There is strong year-to-year (interannual) variability in MJO activity, with long periods of strong activity followed by periods in which the oscillation is weak or absent. This interannual variability of the MJO is partly linked to the El Niño-Southern Oscillation (ENSO) cycle. In the Pacific, strong MJO activity is often observed 6 - 12 months prior to the onset of an El Niño episode, but is virtually absent during an El Niño episode, while MJO activity is typically greater during a La Niña episode. Globally, the interannual variability of the MJO is most determined by atmospheric internal dynamics.
http://anonymouse.org/cgi-bin/anon-w...a.org/wiki/MJO