Question

During which months do ocean surface elevations begin to rise along the equator, indicating the beginning of an el niño?

Answer 1

At the beginning of El Niňo, the sea surface rises typically around December which can last up to 9 months or even 2 years. Luckily, this phenomenon only happens every two to seven years. El Niňo is considered the warm phase of a long cycle, wherein sea surface temperatures rise from the central and east-central equatorial regions of the Pacific.