El-Nino, La-Nina, Southern Oscillation, ENSO El-Nino, La-Nina, Southern Oscillation, ENSO El-Nino, La-Nina, Southern Oscillation, ENSO http://biophysics.sbg.ac.at/atmo/elnino.htm http://biophysics.sbg.ac.at/atmo/elnino.htm El-Nino, La-Nina, Southern Oscillation, ENSO