Waviness timeline (IMAGE)
Caption
Dartmouth researchers used machine learning and long-term climate records to construct a timeline of jet-stream variability since 1901. Nearly all prior studies of the jet stream focus on the period since 1979, when data on weather and climate systems began being collected by satellites. They found several "wavy" periods during the past 125 years, some more pronounced than in recent years. They report that an even stronger wavy period lasting from the 1960s-1980s was the main driver of the "warming hole," a 30-year period of abnormally cool winter temperatures in the United States.
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Jacob Chalif/Dartmouth
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