Niño refers to a climate pattern known as El Niño, which occurs in the Pacific Ocean. It is characterized by the warming of ocean surface temperatures, leading to significant changes in weather patterns around the world. This phenomenon typically happens every two to seven years and can last for several months. The effects of El Niño can include increased rainfall in some regions, droughts in others, and disruptions to marine ecosystems. It can also influence global temperatures, often contributing to warmer years. Understanding El Niño is crucial for predicting weather-related impacts on agriculture, water supply, and disaster preparedness.