Question

what does ENSO mean....

Answer 1

ENSO is a general term used to describe both warm (El Niño) and cool (La Niña) ocean-atmosphere events in the tropical Pacific as well as the Southern Oscillation the atmospheric component of these phenomena.

Answer 2

ENSO is the combination of EL mini and southern oscillaton
The changes in pressure condition are connected to El nino, Hence the phenomenon is referred to as ENSO......