Hello and sorry,
What the heck are those acronyms?
SAM - Southern Annular Mode (SAM) (real rough - Affects the latitudes that the moisture bands run across lower Australia.)
IOD - Indian Ocean Dipole. (real rough again - Moisture content)
They both play a major role in the amount and location of rainfall for SE Australia and feed in to ENSO which is La Nina El Nino etc.
Steve
Ps. Some of the moisture bands are considered aerial rivers now, with flow rates greater than the amazon river in some cases.