Answer:
(differences)
1- El Niña typically lasts 9-12 months while La Nina typically lasts 1-3 years even tho both occur every 3 to 5 years
2- El Niño refers to the above-average sea-surface temperatures that periodically develop across the east-central equatorial Pacific.
La Niña refers to the periodic cooling of sea-surface temperatures across the east-central equatorial Pacific.
3- Although El Niño and La Niña have an influence on global climate trends, they do not affect all regions similarly, nor do their impacts in a particular location. La Niña causes basically the opposite changes in temperature as El Niño in many areas, especially in the tropics.