Recently, more and more studies of scientists have been aimed at studying the consequences of the climatic crisis of the Earth caused by human activities. The statistics of the last decades shows that the planet is inexorably heated, as a result of which incredible waves of heat and drought are falling on the world, and the melting of glaciers can lead to an incredible rise in the ocean level, writes Phys. Org.
In a new study, the international group of ecologists analyzed samples of ice core, taken from the site near the edge of the shelf, and found evidence that the shelf of Ronnah in Western Antarctica did not actually disappear during the last interglacial event. The authors of the study believe that he will probably be able to survive a modern climate change.
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Ronne's shelf attracts the attention of scientists with its huge size. Previous studies have already shown: if it comes off from an ice cap and melts, the result will be a global increase in sea level by 2 meters. This is more than enough to flood several coastal megacities around the world.
In a new study, scientists drilled and removed the ice core to the level of the indigenous breed on the ice rise of SkyTrain near the edge of the shelf of Ronne, at a depth of 651 meters. The team suggested: if the shelf glacier melted for the last time, when the planet encountered high temperatures, then near its edges there would be a significantly higher concentration of sea salt, since it extends over the water.
However, the results did not find a higher concentration of salt - the data was the same as in other parts of the shelf. This indicates that the ice shelf was actually not subjected to strong melting, if at all.
The group also checked the presence of isotopes that carry out evidence of weather phenomena in the ice, and did not find any evidence that the shelf was subjected to significant melting. Now scientists believe that Ronne’s shelf glacier is unlikely to melt in the current conditions and even more - when the whole planet will heat up even more.
However, scientists also found that some conditions today differ from those that were observed during the last global warming - the ocean temperature is much higher. In simple words, the shelf of the glacier has an additional threat - it can begin to melt under the surface, which, in combination with elevated temperatures at the top, can lead to another result.
Previously, Focus wrote that scientists told when Antarctica was not covered with ice and why.