An interest l had many moons ago.All things that drive the weather
Might get back to
There is a long list and l am sure this list is not exhaustive
For anyone who may follow this , here are the abbreviations and their meanings
Often referred to as natural variability.


ENSO.. refers to the El Niño/Southern Oscillation

IOD..Indian ocean dipole

AAO...Antartic oscillation. or SAM..southern annular mode

PDO.....Pacific decadal oscillation

SSTs'. Sea surface temperatures

AO.. Northern hemisphere.. Arctic oscillation

NAM...Northern annular mode

PV....Polar vortex

MJO..Madden Julian Oscillation

BLOCKING index
That list is some of the major players