In the 19th century, over 5 million Germans moved to North America. It was not only a century of poverty, war and revolutions in what is now Germany, but also of variable climate. Starting at the tail end of the cold period known as the Little Ice Age, the century saw glacier advances in the Alps, and a number of chilly winters and cool summers, as well as other extreme weather events such as droughts and floods. “Overall, we found that climate indirectly explains up to 20-30% of migration from Southwest Germany to North America in the 19th century,” says Rüdiger Glaser, a professor at the University of Freiburg, Germany, and lead-author of the Climate of the Past study. The researchers could see a climate signature in most major migration waves from Southwest Germany during the 19th century. “The chain of effects is clearly visible: poor climate conditions lead to low crop yields, rising cereal prices and finally emigration,” says Glaser. “But it is only one piece of the puzzle.” “Our results show that the influence of climate was marked differently during the different migration waves,” adds Iso Himmelsbach, another of the researchers at the University of Freiburg who took… Read full this story
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