Scientists from the United States believes that the melting of glacial glacial river and global global warming can cause a series of powerful eruptions in volcanoes in North America, New Zealand and Russia. About this report Direct science.
The melting tape weakens the pressure on underground Magma focus and increases the eruption. This process has previously been observed in Iceland on the border of an assist. A new study conducted in Chile was one of the first works to confirm the increase of volcanoes on the continent in the past – after the end of the last ice decision.
The study was led by Pablo Morino-Yeger from the University of Wisconsin in Madison (USA). It includes Cao camp camp in Andes, between active and sleeping volcanoes.
Scientists pay special attention to Mojuenko volcano. They used radioactive dating to evaluate the age of volcanic rocks were formed before, during and after the last ice age, when the Patagon band covered the territory with a thickness of 1500 meters.
The analysis of minerals in the rock also shows the depth and temperature that they form. These data showed that the thick ice layer blocked the eruption between 26 to 18 thousand years ago, allowing a large Magma tank to form at a depth of 10-15 km under the surface.
After melting, about 13,000 years ago, the pressure on the Magma chamber was removed, the gases in a liquid or melting were expanded, and the explosive eruptions began.
We find that after liberation from glaciers, volcanoes started to erupt much more often
According to scientists, at least one hundred volcanoes sleep under a thick layer of ice under a thick layer of ice. It is very likely that this ice will be lost in decades and centuries.
The eruption of volcanoes can temporarily cool the earth, thrown into the atmosphere that reflects the sunlight of the particles. However, prolonged eruptions will throw significant volume of greenhouse gases into the atmosphere, including carbon dioxide and methane. This will heat the planet even more and create a vicious cycle, in which the increase in temperature leads to ice melting, more eruption and even greater global warming.