You wrote, «Since the variations in the Nino 3.4 index are indicative of the functioning of one of the Earth's major thermoregulating mechanisms,
namely the giant El Nino / La Nina pump that magically materializes to move
warm tropical Pacific
water to the poles whenever the planet gets too hot and sweaty... then under what possible construction could the Nino 3.4 Index variations be called «noise»?»