What condition trigger a la nino episode?

Answer 1

A La Niña episode is triggered by a combination of cooler-than-average sea surface temperatures in the central and eastern Pacific Ocean and changes in wind patterns. Specifically, strong trade winds push warm water toward the western Pacific, allowing colder water to rise from the depths in the east. This phenomenon impacts global weather patterns, often resulting in increased rainfall in the western Pacific and drier conditions in the eastern Pacific. The interaction between ocean temperatures and atmospheric conditions is crucial for the development of La Niña.