El Niño: What it is and how it could impact Paraguay

The El Niño-Southern Oscillation (ENOS) phenomenon, originating in the Pacific Ocean, is set to influence Paraguay starting in August, according to Eduardo Mingo, director of Meteorology and Hydrology. Mingo detailed that El Niño involves a warming of Pacific waters off the coasts of Peru and Ecuador, which transfers energy to the atmosphere and weakens the easterly trade winds.

This atmospheric shift can have global teleconnections, impacting weather patterns far from its origin. While often associated with heavy rains and floods, Mingo explained that its effects are complex. For Paraguay, a key potential impact is the weakening of cold fronts originating from the south. This could mean less severe frosts and colder spells, though the overall effect on weather systems remains to be seen.

Mingo clarified that the phenomenon is not El Niño occurring within Paraguay itself, but rather its distant oceanic origins creating a chain reaction. The director emphasized the need to understand these teleconnections to predict local impacts. The phenomenon has three phases: El Niño (warm), La Niña (cool, typically drier), and a neutral phase.