Why El Niño Forecasts Are Often Wrong in Spring

El Niño events change weather, farming, and economies around the world. It is important to predict El Niño correctly. A new study shows that climate models often make mistakes when they predict El Niño in spring.

Scientists call the months from March to May the “spring predictability barrier.” This is because it is hard to know if El Niño will happen during this time. The models often say they are sure about El Niño in spring, but many times they are wrong.

The researchers found that the models use signals from the tropical Pacific Ocean too much. These signals are important, but the models forget to use other important information from outside the tropics. This mistake makes the forecasts wrong.

The scientists who wrote the study are Aaron Levine from the University of Washington and Michelle L’Heureux and Caihong Wen from the NOAA Climate Prediction Center. Their work helps us understand why spring El Niño forecasts often fail.