A new study by experts from the University of Colorado at Boulder (USA), claims that a mysterious cooling, marked on the planet centuries ago, was caused by a series of powerful volcanic eruptions that triggered the chain of a number of climatic fluctuations, particularly noticeable expansion of the polar ice caps. In the scientific literature, a cold snap in the Middle Ages is often referred to by experts as the Little Ice Age.
Climate scientists studied chemical deposits in the Arctic Circle, and analyzed a large number of soil, sediment, and came to the conclusion that the Little Ice Age began in the late 13th century and continued until the second half of the 19th century. All this time, the weather on the planet was well below normal, and many northern cities in Europe were abandoned people, as settlements were in the zone of permafrost and it was impossible to live.
Scientists say the next Little Ice Age and marked in a variety of literary works, which refers to the freezing of the Thames in London in the winter, the freezing of water channels Netherlands (now neither Thames nor the Dutch canals freeze over in winter), the fall of temperature in the modern USA and Canada. There is literary evidence of temperature decline in other parts of the world. In addition, the European literature is a mass of evidence of epidemics of colds among the citizens, as well as other indirect evidence to reduce temperatures in the fall and winter.
Miller says that trying to understand the causes of climate change, researchers tried to study time period for 50-100 years before the cold snap, and appears to have found such signs. First, in the soil, some relating to the years 1275-1300 BC, the scientists found a variety of volcanic particles, which previously had to be in the atmosphere, but then with the fallout settled on the surface. Moreover, in places where they found particles of volcanic ash, there are no volcanoes, so these particles were so many, and their concentration was such that they were spread over many thousands of kilometers from the eruption.
Given the specifics of research is likely to scientists studying medieval cooling had to use very diverse software, including use of the program for android, when the hand was not PC. After all, many of the programs for the PC perfectly duplicated on anroid. So scientists have no problems if they had something urgent to count.