Combined climate drivers beginning to have seasonal outlook use

摘要

In the last three years farmers have seen the full gamut of seasonal climate driver possibilities for SE Australia - El Nino, La Nina, positive and negative Indian Ocean Dipole (I0D), positive and negative Southern Annular Mode (SAM) and Sub TropicalRidge (STR) in both high and low positions with high and low pressure. Dale Grey and Chris Sounness contend when combined these indicators are beginning to show good correlation with winter/spring rainfall in Victoria. The El Nino Southern Oscillation (ENSO) is the major driver of climate in Victoria. Life is never simple however, as the individual effect of an ENSO event is a complex interaction between ocean surface and undersea temperatures, and the position of wind, air pressure and cloud across the equator in the Pacific Ocean.