According to the overwhelming scientific consensus, the planet is warming at a rate accelerated by the greenhouse gases from human activity.
Antarctica has lost a staggering three trillion tonnes of ice since 1992, according to a landmark study published Thursday that suggests the frozen continent could redraw Earth's coastlines if global warming continues unchecked.
Already floating, ice shelves breaking off into icebergs do not add to sea level. Prof. Shepherd said, "We have long suspected that changes in Earth's climate will affect the polar ice sheets".
"Ocean sanctuaries create havens for marine life to build resilience to a changing ocean, but also crucially help us avoid the worst effects of climate change, by preserving healthy ocean ecosystems that play a vital role storing carbon". But there are so many different papers that it's hard to know which number to use, he said.
Finally, the largest part of the continent, East Antarctica, has remained more stable and didn't contribute much ice to the ocean during the period of study, the assessment says.
The ice sheet mass balance inter-comparison exercise (IMBIE) is an worldwide effort: a team of 84 polar scientists from 44 organisations, including both of us, working together to provide a single, global record of ice loss from Earth's polar ice sheets. However, in the last five years, it too has begun to lose ice, perhaps as much as 28 billion tons per year, although the uncertainty surrounding this number remains high.
The scientists used satellite data that relied on three different methods, measuring its volume, its flow over the landscape and its gravitational attraction.
From 1992 to 2011, Antarctica lost almost 84 billion tons of ice a year (76 billion metric tons).
We have found that since 1992 Antarctica has lost 2,720 billion tonnes of ice, raising global sea levels by 7.6mm.
According to research scientists, the melting of the raised world sea levels by nearly a centimeter from the beginning of 1990-ies that could ultimately represent a danger to coastlines from the Pacific Islands to Florida.
"At the moment, we have projections going through to 2100, which is sort of on a lifetime of what we can envisage", she said. "That doesn't mean we should be desperate", Velicogna told AP.
A single millimeter of global sea level rise is equivalent to 360 billion tonnes of melted ice, or an imaginary enormous ice cube with sides about seven kilometers (4.35 miles) long. Therefore, bistratose areas on the continent were two ice shelf - pine island glacier and Thwaites.
The Atlantic noted this week that millions of people on the U.S. East Coast could be displaced from their homes by the end of the century because of melting in parts of western Antarctica ― which scientists have identified as being the source of most of the recent melting. "We will not necessarily see exclusively rapid retreat", said Christianson, noting that as glaciers like Pine Island retreat backwards down a submarine, downhill slope, they will sometimes encounter bumps that slow down their movement.
"Our study underlines the importance of understanding the mechanisms driving these sea ice trends, particularly in regions where sea ice acts as a protective buffer against ocean processes", he said.