Climate model biases push North Pacific jet stream southward
Researchers analyzing Coupled Model Intercomparison Project Phase 6 data found that sea surface temperature errors shift the North Pacific westerly jet stream southward in most simulations.
Model simulations show consistent bias
Comparing different atmospheric and ocean simulations, the team identified a clear pattern across the dataset. In 34 of the 35 models examined, the westerly jet appeared farther south when sea surface temperatures were simulated rather than observed. This discrepancy highlights how present-day climate model characteristics influence future projections.
Study published in Geophysical Research Letters
The findings were released in a study focusing on the North Pacific westerly jet band of strong winds. Understanding these causes is important for improving the reliability of future climate change forecasts. The research involved institutions around the world participating in an international comparison project.
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