El Nino heads for an ‘unheard-of’ peak this year

This year's El Nino weather phenomenon is predicted to be the most powerful in over a century, according to Britain's national weather agency, the Met Office. El Nino is triggered when sea surface temperatures in the tropical eastern Pacific rise by 0.5C above their typical average, leading to widespread alterations in global winds, atmospheric pressure, rainfall, and overall temperatures.

Adam Scaife, head of long-range forecasting at the Met Office, stated that the anticipated peak of this El Nino is over three degrees, a temperature level that has never been observed in modern climate records. He described this event as unprecedented and emphasized that he has never witnessed an El Nino signal as intense in his forecasts.

The already significant warmth, up to nearly two degrees above average, is expected to have particularly severe impacts in tropical regions, including severe droughts in South America and the Western Pacific. Current temperatures in this region are approximately 2.6C above the 30-year average, as reported by the Climate Brink dashboard.

These are long-term, persistent conditions rather than short-term weather forecasts. Scaife, a physicist specializing in climate modelling, noted the well-known impacts of El Nino on various systems, including food security. He also mentioned that this weather pattern is expected to bring increased rainfall and storminess in the UK during November.