The much-anticipated El Niño has arrived and is exceeding expectations. Earlier this year, climate experts predicted the development of an El Niño in the central Pacific region. Over time, more models projected a strong or even “super” El Niño, although it was cautioned that certainty was premature.
In its June monthly update, the U.S. National Oceanic and Atmospheric Administration (NOAA) confirmed the onset of warmer conditions in the Niño 3.4 region of the Pacific Ocean, meeting the criteria for an El Niño with temperatures surpassing 0.5 C above average. Presently, ocean temperatures in the region are nearly 2 C above average, setting a record high for this time of year.
Climate scientist Zeke Hausfather noted that temperatures are already touching the threshold for a very strong or “super” El Niño, with the potential for further escalation. El Niño, along with La Niña, are components of the broader El Niño Southern Oscillation (ENSO) cycle, impacting the specific Pacific Ocean region.
While some forecasts suggest the peak of this El Niño may occur in October, most models indicate a peak in November or December. This rapid evolution from La Niña to El Niño within a year raises questions about the underlying causes, with some attributing it to climate change.
The potential severity of this El Niño raises concerns about its impact on food security in tropical regions and wildfire risk in Western Canada during the upcoming winter months. Hausfather emphasized the significant implications of El Niño, urging preparedness for its potential effects on agriculture, ecosystems, and oceanic environments.