El Nino is a warm ocean current. It is a natural climate pattern characterized by a warming of the ocean surface temperatures in the central and eastern parts of the Pacific Ocean. This phenomenon occurs irregularly every few years and can last for several months to a year or more. El Nino has significant impacts on global weather patterns, including temperature and rainfall distribution.

Option 2: A sea storm is not the correct description for El Nino. Although El Nino can influence weather patterns and potentially contribute to the formation of storms, it is not itself a storm.

Option 3: El Nino is not a tropical disturbance. While it can disrupt normal weather patterns in tropical regions, it is not a tropical disturbance.

Option 4: El Nino is not another name for a typhoon. Typhoons are tropical cyclones typically occurring in the western Pacific Ocean, while El Nino refers to a specific climate pattern associated with warming ocean temperatures.