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flag New Zealand updates El Niño/La Niña tracking to reflect warming oceans, improving forecast accuracy.

flag Rising ocean temperatures from global warming are making traditional El Niño and La Niña tracking less accurate, prompting New Zealand to adopt a new method that compares sea surface temperatures to the current tropical average instead of fixed historical baselines. flag This change better reflects real-world impacts, as seen in the 2024–25 summer when La Niña-like conditions occurred despite not meeting old thresholds. flag The updated approach improves forecast accuracy, though ENSO remains one part of a complex climate system.

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