Permafrost is beginning to melt. Than it threatens?
Source:Melting permafrost can worsen the effects of climate change
Today it is difficult to find a person who never heard anything about melting . But in addition to all the famous glaciers in some parts of our planet is permafrost — underground ice and cold that penetrate into the depths of the bowels of the earth for hundreds of meters. Permafrost — is an underground layer of Earth cryosphere — special natural shell with negative temperature and ground ice. This is the most enigmatic and mysterious ice on the Ground and still scientists are unable to say exactly how they formed. And while some researchers are looking for the answer to this question, others drew attention to the fact that the permafrost is melting. And this is very bad for all of us.
How quickly the permafrost melts?
According to the study published in the journal , due to the melting of the permafrost in the Arctic, holes in the landscape. However, this is only half the trouble. As writes the edition , current estimates of carbon emissions due to the sharp melting of permafrost data obtained must be doubled. In the past, the intergovernmental group of experts on climate change (IPCC) did not consider the phenomenon of thermokarst — degraded land, ravaged by a sudden thaw. When permafrost, which keeps the soil disappears, the hillsides are destroyed because of what suddenly be a huge failure.
This destructive effect takes place through meters of the permafrost and it takes a few months or a few years. In the past it was thought that the permafrost is melting just a few inches over decades. The rapid melting of permafrost is not only causing huge carbon emissions into the Earth's atmosphere, but also the destruction of the landscape. According to researchers, the amount of carbon which is released from a small number of holes in the landscape is large enough to double the amount of harmful emissions, thereby increasing the negative effect .
Rapid changes
According to the results, the dramatic thawing of permafrost is expected to less than 20% of the permafrost zone, however, due to the collapse of the soil, rapid erosion and landslides, the number may increase significantly. The sudden thawing of the permafrost carbon dioxide and releases huge amounts of methane — a potent greenhouse gas. Thus, if a sudden thaw will occur only in 5% of the permafrost emissions will equal a much larger area that can also quickly change the landscape: forests can become lakes during the month, as landslides occur without warning, and the invisible holes from the methane can swallow a snowmobile whole. All ecosystems may turn into one big mess, scientists say.
Processes occurring during the melting of the permafrost is destroying the soil and landscape
In the study, the authors have witnessed rapid changes. Moreover, the researchers found that the calculations of the amount of harmful emissions into the atmosphere by the melting of permafrost was not taken into account. The impact of the melting of the eternal ice is not represented in any of the existing models.Scientists call on colleagues to include data on the melting of the permafrost in all climate models. This is to ensure that the worst effects of climate change, which may in the future face of humanity.
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