Global warming is a matter that concerns us all. Researchers and people alike have been blaming man’s activity for the rapid change of weather and its dangerous effects. Now a new study shows that global warming would have happened with or without man’s contribution, and the sea ice is a strong argument for it.
The recent research analyzed the sea ice, about which we already know it is melting and increasing its water level. Nevertheless, British scientists decided they should have a look at how things went before the ice age, in order to make a comparison.
What the British scientists did was to gather information on the last warm period of the Earth, the last interglacial era, which was quite similar to what happens today in terms of temperature. They observed that almost 65% of sea ice was melting back then, too. The prediction for our era is that 60% of the current sea ice is most likely to melt in about one hundred years. The past and the present percentages are very close, which makes researchers believe their calculations are right.
The study was led by Louise Sime, who said in a statement:
“The current rapid retreat of sea ice in the Arctic Sea is of critical importance to Arctic ecosystems and global climate. By uncovering, for the first time, a huge retreat around Antarctica we have established that sea ice in the Southern Hemisphere is also susceptible to major climate changes. This discovery will help us understand whether similar sea ice retreat events are likely in a future high-CO2 world.”
The researchers’ team also declared:
“We were expecting to see a relationship between warm temperatures around 128,000 years ago and a past collapse of the West Antarctic Ice Sheet. Surprisingly, we found that a major retreat of Antarctic sea ice is a more likely explanation. Our analysis suggests that a collapse of the West Antarctic Ice Sheet occurred later during the last interglacial. Something that our team will be looking at in more detail through another collaborative UK-US project.’
The new data is very important, as it can help researchers figure out how to deal with these phenomena. Global warming and climate changes seem to be advancing naturally, with no help from man. What scientists think about now is what man can do in order to prevent the advancing, to make it slow down, or to cope with the effects.
The British study was published in Nature Communication.
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