Severe Winter Weather Not Linked to Wavier Jet Stream: Study

Quick Summary

• Recent research indicates that increasingly erratic winter weather in the northern hemisphere is not caused by a wavier polar jet stream.
• The polar jet stream separates temperate air from Arctic cold air and naturally varies during winter months.
• Utilizing temperature and atmospheric pressure data since 1901, researchers found periods of increased jet stream waviness throughout the 20th century, suggesting current behavior is not unusual.
• winters are becoming warmer and wetter due to climate change-induced intense storms, self-reliant of changes to the jet stream, concludes Erich Osterberg from Dartmouth College.
• Analysis emphasizes assessing long-term data for better understanding of the polar jet stream’s historical patterns.
• The summer season shows mounting evidence that climate change has made the polar jet slower and wavier, contributing to extreme heatwaves, droughts, and wildfires.

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