The conditions high in the atmosphere were also conducive for an epidemic.
By 1350, the Black Death had killedaround a thirdof Englands population, if not more.
By that point, greenhouse gas emissions spewed during the Industrial Revolution had already begun to affect its patterns.
A firefighter battles a wildfire.Photo: Toa55/Shutterstock
The jet streams whims can lead to what the study calls cascading effects.
And when people are sick, they cant work as much in the fields, limiting harvests further.
In the aftermath, the countrys wheat production plummeted by 25 percent.
Tracking the jet streams movement back to Medieval times wasnt a simple process.
(When the jet stream veers south, those conditions are flipped.)
Like, monks in Ireland for centuries and centuries have been writing things down about famine and epidemics.
This article originally appeared inGrist.
Grist is a nonprofit, independent media organization dedicated to telling stories of climate solutions and a just future.
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