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Climate change 5200 years ago
Geology professor at Ohio State University Lonnie Thompson and his colleagues found some evidence that about 5200 years ago, there was a sharp global climate change. Thompson spent many years at the junction of the most remote corners of the world in search of ancient glaciers. Taken in different regions of the sample, as well as some unique discoveries related to these glaciers, show the same 5200 years ago, there was a sharp drop in temperature around the globe.
In particular, the carbon analysis cancel the plants released from a glacier in the Peruvian Andes Kelkkaya showed their age as a time of about 5200 years. This means that climate change was of so abrupt that the glacier is almost instantly captured these plants.
Currently, the ice cap thickness of 168 meters is rapidly receding, and since the beginning of observation in 1963 that the rate of retreat is increasing exponentially.
In 1991 aliyskih glaciers we found perfectly preserved body of a man. When we found out during his life and death, it became clear that he had just died 5200 years ago.
Furthermore, Thompson suggests the data obtained during the study of tree rings in England and Ireland during the last seven thousand years. The most narrow, as it turned out, tree rings were just about 5200 years ago. This means that at this time the trees have experienced the driest period.
Thompson also recalls that the study of glaciers on top of Mount Kilimanjaro shows that 5200 years ago the temperature in the region was the lowest. At the same time, the Sahara has evolved from a very suitable habitat for the region in the desert, there have been major changes in the pollen found on the shores of lakes in South America, and in the ice of Greenland and the Antarctic are of the same period, there has been the most low methane content. < br /> "At that time there was something truly monumental - Thompson says - but for men it was not obvious, since in those days the world was inhabited by only about 250 million people, compared with 6, 4 billion today. The collected data clearly indicate a change in this period. But they also show that with the Earth's climate is now going through a similar ».
The same dramatic climate change as 5200 years ago, would have disastrous consequences for the contemporary world. Approximately 70% of the population lives in tropical areas, and climate fluctuations affect primarily on them.
Thompson believes that the cause of what happened 5,200 years ago, a sharp jump in temperature has become a powerful fluctuation in solar energy reaching the Earth. Scientists know that in the period between 1450 and 1850 fell the so-called Little Ice Age: solar activity at this time of twice decreased markedly. Apparently, 5200 years ago, solar activity also fell sharply, then rose a relatively short period.
"The climate system is extremely sensitive to natural changes in nature. It is very likely that it is just as sensitive to the impact that has on the nature of man "- said Thompson, adding that we are talking about the greenhouse effect, global changes in land use and dependence on fossil fuel civilization.
According to geologists, the current climate observations demonstrate that dramatic changes can occur at any time.
In particular, the carbon analysis cancel the plants released from a glacier in the Peruvian Andes Kelkkaya showed their age as a time of about 5200 years. This means that climate change was of so abrupt that the glacier is almost instantly captured these plants.
Currently, the ice cap thickness of 168 meters is rapidly receding, and since the beginning of observation in 1963 that the rate of retreat is increasing exponentially.
In 1991 aliyskih glaciers we found perfectly preserved body of a man. When we found out during his life and death, it became clear that he had just died 5200 years ago.
Furthermore, Thompson suggests the data obtained during the study of tree rings in England and Ireland during the last seven thousand years. The most narrow, as it turned out, tree rings were just about 5200 years ago. This means that at this time the trees have experienced the driest period.
Thompson also recalls that the study of glaciers on top of Mount Kilimanjaro shows that 5200 years ago the temperature in the region was the lowest. At the same time, the Sahara has evolved from a very suitable habitat for the region in the desert, there have been major changes in the pollen found on the shores of lakes in South America, and in the ice of Greenland and the Antarctic are of the same period, there has been the most low methane content. < br /> "At that time there was something truly monumental - Thompson says - but for men it was not obvious, since in those days the world was inhabited by only about 250 million people, compared with 6, 4 billion today. The collected data clearly indicate a change in this period. But they also show that with the Earth's climate is now going through a similar ».
The same dramatic climate change as 5200 years ago, would have disastrous consequences for the contemporary world. Approximately 70% of the population lives in tropical areas, and climate fluctuations affect primarily on them.
Thompson believes that the cause of what happened 5,200 years ago, a sharp jump in temperature has become a powerful fluctuation in solar energy reaching the Earth. Scientists know that in the period between 1450 and 1850 fell the so-called Little Ice Age: solar activity at this time of twice decreased markedly. Apparently, 5200 years ago, solar activity also fell sharply, then rose a relatively short period.
"The climate system is extremely sensitive to natural changes in nature. It is very likely that it is just as sensitive to the impact that has on the nature of man "- said Thompson, adding that we are talking about the greenhouse effect, global changes in land use and dependence on fossil fuel civilization.
According to geologists, the current climate observations demonstrate that dramatic changes can occur at any time.
