The phenomenon La niña should happen later this year, according to the statement from WMO (World Meteorological Organization) this Wednesday (11). Despite this, it will not be enough to reverse the warming that the world.
La Niña is an oceanic climate phenomenon that is the opposite of El Niño and occurs when there is cooling in the Central and Central-Eastern Equatorial band of the Pacific Ocean, resulting in lower temperatures and more rainfall in some regions.
The year 2024 experienced an extreme El Niño, with the driest and hottest year in recent history, a result of increased greenhouse gas emissions. The arrival of La Niña brings the expectation of cooling mainly to the North region, although it is not capable of reversing the situation.
Main effects of La Niña in Brazil:
- Increased rainfall in the North and Northeast regions;
- Dry weather in the South and Center-South with more irregular rainfall;
- Entry of cold air masses
Despite the forecast, the chances that were 70% in July are now 55%. According to the WMO, it should arrive in a weaker form and with a short duration later this year, between December and February.
According to WMO Secretary General Celeste Saulo, “2024 started with an El Niño and is on track to be the warmest year on record. Even if a La Niña event emerges, its short-term cooling impact will be insufficient to offset the warming effect of greenhouse gases that are trapping record heat in the atmosphere.”
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