Angel.I liked you post. This is something a tropical forecaster faces each day to do good forecasts. Everyday you have to see the MJO signal and the ENSO background signal (I should say that you have to hear at least two orchestras playing at the same time). Sometimes the two orchestras play the same partitures and complement each other: this means they collaborate each other. I remember this was the case in LA NIÑA 2011....but I have the doubt: it rained a lot of because of LA NIÑA or because of positive phase of MJO? Sometimes they play different partitures and they do not collaborate each other... destruction or like you mention in diplomatic terms: "destructive interference". For short range forecasts, you can see the signal but in case you have to do a long range seasonal forecast you can´t imagine how the MJO signal will be in three months.