Global warming causing 'irreversible' mass melting in Antarctica: scientist

Global warming was leading to an "irreversible" mass melting of the Antarctic ice and purging carbon from the atmosphere was the only solution to slow the process, an Australian climate scientist told Reuters on Wednesday.

Recent human activity has intensified global warming, which could result in a mass melting of Antarctica, said Zoe Thomas, a research fellow at the University of New South Wales who was part of an international team of scientists that recently published a paper on Antarctic ice melting.

The study showed the world could lose most of the West Antarctic Ice Sheet, which rests on the seabed and is fringed by floating ice, in a warmer world.

"What we're seeing with the West Antarctic Ice Sheet, that this starting of the melt, once we reach a certain threshold, will continue despite our efforts to stop it," she told Reuters.

The team hopes to continue the research to determine how quickly the ice sheets responded to increased temperatures, which would help provide a more concrete time frame for the future. The hottest temperature ever recorded in Antarctica of 18.3 degrees Celsius (64.94 degrees Fahrenheit) was taken at a research base there on February 6. If hotter temperatures were to sustain they could cause an extreme global sea level rise.

"This will gradually displace people as it goes," Thomas said. "We know this is already happening in small island communities and this will just continue to happen gradually as more and more houses are being inundated at high tide, then at normal tide and then even at low tide." Thomas said that the only thing that would slow down the ice melting was if economies across the world began de-carbonising themselves. "Once we commit to this de-carbonised future can then we start thinking about potential options for trying to remove carbon from the atmosphere," she added.