The highly anticipated El Niño has arrived and is already proving to be significant. Earlier in the year, climate experts had predicted the development of an El Niño in the central Pacific area. As time passed, more models indicated the likelihood of a strong or “super” El Niño, although uncertainties remained. In its June update, the U.S. National Oceanic and Atmospheric Administration (NOAA) officially recognized the presence of warmer conditions in the specific region known as Niño 3.4, a crucial indicator for El Niño.
For an event to be classified as El Niño, temperatures in the designated area must exceed the average by 0.5 degrees Celsius. Currently, ocean temperatures are nearly 2 degrees Celsius above the norm, setting a record for this time of year. According to Zeke Hausfather, a climate scientist at Berkeley Earth, temperatures in the Nino 3.4 region have surpassed 2 degrees Celsius, indicating the potential for a very strong or even a “super” El Niño.
El Niño and La Niña are part of the El Niño Southern Oscillation (ENSO) cycle, affecting the Pacific Ocean region. While La Niña brings cooler conditions, El Niño leads to warmer temperatures. Forecasts suggest that the peak of this El Niño event may occur in October, although many models point to November or December as more likely timing.
Comparing with past records, the 2015-2016 El Niño was one of the strongest, with an ocean temperature anomaly of around 2.75 degrees Celsius. The rapid transition from La Niña to El Niño this year has raised questions about the reasons behind such a swift change. Some climate models even project a peak temperature anomaly of up to 3.6 degrees Celsius, surpassing historical El Niño extremes.
The potential impact of this strong El Niño on food security in tropical regions and wildfire risks in Western Canada is a cause for concern. Hausfather emphasized the need to prepare for the far-reaching effects of El Niño, highlighting its significance for agriculture, ecosystems, and oceanic environments.
