Warming permafrost in danger
Until 90% permafrost of the polar regions of Canada, Russia and Alaska could disappear by 2100 because of global warming, much earlier, in fact, that what researchers have so far predicted .
This is what reveals a study by the US Center for Atmospheric Research (NCAR).
Permafrost is what?
Permafrost is the earth's surface layer that is permanently frozen deep. It represents a quarter of the entire northern hemisphere. It is also known as permafrost.
The study permafrost area will be reduced to 4 0,4 million square kilometers by the end of the century, 1,5 million square kilometers in the most optimistic scenario.
Furthermore, melting permafrost will release gradually into Earth's atmosphere billions of tons of methane, generated by organic matter when these lands were not frozen, there are more than 10 000 years. Learn more about methane hydrates.
The study NCAR provides that the impact of greenhouse gases, 22 times more powerful than carbon dioxide, will be much more important than what previous research had predicted. His massive release should accelerate and intensify global warming.
Moreover, the melting of Arctic ice will increase the absorption of sunlight by sea, which will increase in the medium term, its temperature.
This environmental disaster will pose significant challenges to governments. These will strengthen the banks experiencing accelerated erosion, predict the consequences for road and industrial infrastructure and even expect to move communities by 50 years.