Antarctica has lost almost 3 trillion tonnes of ice since 1992

Antarctica has lost almost 3 trillion tonnes of ice since 1992

This does not include other dwindling ice sheets around the globe, including the massive one in Greenland.

De Conto and other researchers projected some worst-case scenarios in their studies to see what happens if the Antarctic ice continues to melt.

The Antarctic ice sheet lost almost 3 trillion metric tons of ice from 1992 to 2017 and tripled its rate of loss over that time for West Antarctica, according to an worldwide collaboration involving some 80 scientists. It is the most complete picture of Antarctic ice sheet change to date - 84 scientists from 44 institutions combined 24 satellite surveys to produce the assessment. In the Amundsen Sea Embayment (named after Roald Amundsen, one of the first explorers to reach the South Pole) warming ocean temperatures have reduced the floating ice shelves which slow the flow of the mighty Pine Island and Thwaites Glaciers, resulting in a rapid acceleration of ice losses.

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. The researchers also found that three millimeters of this sea level rise has occurred in the last five years alone. If continental ice sheets lose 100 billion tonnes of mass mean sea level will rise by 0.28 mm.

Most of this ice loss has come from West Antarctica.

The researchers, including those from the University of Leeds in the United Kingdom, reviewed decades of satellite measurements to reveal how and why Antarctica's glaciers, ice shelves, and sea ice are changing. By mapping our measured sea level contribution on top of these projections, we found that our previous assessment of Antarctic sea level contribution, which measured ice loss until 2012, was tracking the IPCC's lowest projection.

According to the study, ice losses from Antarctica are causing sea levels to rise faster today than at any time in the past 25 years.

Rising sea levels are a particular concern to areas of high population density in coastal areas, where sea levels play a role in flooding and shoreline erosion.

Hamish Pritchard summer clouds swirl around the Staccato Peaks of Alexander Island off the Antarctic Peninsula. In a study released Wednesday

According to two new studies, the ice in Antarctica is melting at record levels, and the subsequent sea rises can have catastrophic consequences for cities around the world. The melting ice and warming waters have all been primarily driven by human emissions of greenhouse gases.

"If you're close to the ice sheet that's losing mass you don't really feel the effects as much".

In time, this flexing weakens the cracks and fractures already existing in Antarctica's ice shelves, causing them to break up and splinter, calving off in detached pieces.

Looking closer, the rapid, recent changes are nearly entirely driven by the West Antarctic ice sheet, which scientists have long viewed as an Achilles' heel.

"The datasets from IMBIE are extremely valuable for the ice sheet modeling community", said study co-author Sophie Nowicki of NASA's Goddard Space Flight Center in Greenbelt, Maryland.

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.

Coastal flooding during storms at high tides will be more damaging and a threat to cities, from NY to Shanghai as well as low-lying nations from the Pacific Ocean to the Netherlands.


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