these factors may is widespread

While in 700 AD 1000 A.D. years during, weather pattern stability. Meanwhile, in the north-western Europe country, society began to revive. Around the same time, Norway colonies arisen, and expand into Iceland and Greenland.

In addition, climate change with the spread of the black plague also seems to be closely related. A.D. 1347 years, the terrible disease killed in central Europe about half the population. The new study found that in the black plague outbreak of decades, European tide summer wet more rain, and experience a large cold snap, these phenomena XiaoBingQi happened with a corresponding period. There are signs that hunger and people overall health condition, and further down the fuse induced people infected with pestilence.

History another section famous extremely cold weather occurred in the early 17th century Europe zero at the thirty years' war. During this period, many people have fled the European continent, immigrants to America.

"This is not to say that because the local cold weather, so appeared war," the field-glass root said. "but this weather is stoking. Political unrest have made people had enough to eat, but summer low-temperature suffered more let them feel the unbearable."

In short, these findings for understanding human social history provides a new and accurate evidence chain, from Arkansas college earth scientists David listrac le think so. But it is only point of heavy merger proves nothing. He added that many drought, cold climate events such as little relationship with the main cultural activities. "Human life environment full of coincidence and variables. We don't have to say these extreme weather events will influence social development track. But it is a heart area covers Western Europe of magnanimous database of weather conditions." Listrac caleb said.

Research results can be displayed in meteorological instruments was invented before period of history, climate change clear track. Now, we can see the change of people's lives as many factor, climate factor is how to play a role.