CANBERRA - Melting ice in the summer in Antarctica has reached its highest in a thousand years, say researchers from Australia and the UK on Monday (15/4). That new evidence on the impact of global warming on the Antarctic ice sheet is sensitive.
Researchers from the Australian National University and Antarctic Research-UK, dambil data obtained from ice cores show the summer melting occurs 10 times more powerful in the last 50 years, compared to 600 years ago. "This is strong evidence that climate change has made changes in Antarctica," said lead researcher Nerilie Abram.
Abram and his team drilled deep as 364 meters to reach the ice core in the James Ross Island, at the northern tip of the peninsula Antartka to measure the temperature history and compare it with the rate of ice melt in the summer in the region. They found evidence that the ice temperature slowly rose as much as 1.6 degrees over 600 years and the melting of ice on average stronger in the last 50 years.
This indicates that melting ice can increase dramatically depending on the weather when the temperature reaches the point. "By the time the weather reaches above the level of achievement of zero degrees, the amount of melt that will occur is extremely sensitive face temperature rise that may occur," said Abram.
The research Robert Mulvaney of the British Antarctic-said, may be the biggest melting glaciers and avalanche kehilangaan cause of the Antarctic ice sheet in the last 50 years. Results were published in the journal Nature Geoscience.