Published: Sun, June 17, 2018
Sci-tech | By Carrie Guzman

Antarctica losing ice twice as fast as six years ago

Antarctica losing ice twice as fast as six years ago

Furthermore, in the Antarctic Peninsula, ice shelf collapse has boosted annual ice loss by 25 billion tons since the early 2000s.

Professor Siegert is a co-author of the new study in the journal Nature at the imperial College London.

The study, by an global team of polar scientists led by Canada Research Chair Christine Dow of Waterloo's Faculty of Environment, discovered that the process of warmer ocean water destabilizing ice shelves from below is also cracking them apart from above, increasing the chance they'll break off.

The assessment, led by Professor Andrew Shepherd at the University of Leeds and Dr Erik Ivins at NASA's Jet Propulsion Laboratory in California, was supported by the European Space Agency (ESA) and the US National Aeronautics and Space Administration (NASA).

"The Antarctic Ice Sheet is an important indicator of climate change and driver of sea-level rise", the IMBIE team wrote in their Nature paper.

Antarctica is not the only contributor to sea-level rise. Of the three, the East Antarctic Ice Sheet is the largest potential contributor to sea level rise. They attribute the threefold increase in ice loss from the continent since 2012 to a combination of increased rates of ice melt in West Antarctica and the Antarctic Peninsula, and reduced growth of the East Antarctic ice sheet.

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.

The Antarctic ice sheets are melting many times faster than previously thought, significantly increasing the rise of global sea levels in recent years, according to a new research by a group of United States and UK scientists. Antarctica is now causing sea levels to rise at a rate of 0.6mm a year - faster now than at any time in the past 25 years.

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

Hamish Pritchard summer clouds swirl around the Staccato Peaks of Alexander Island off the Antarctic Peninsula. In a study released Wednesday
Melting of Antarctica is speeding up, worrying scientists

"A critical question for the future is how ocean-driven melting of Antarctic ice shelves will change as the earth warms".

"In the past we've been persuaded of a narrative that sea level rise affects people in low-lying countries in the Pacific Ocean, and while that's devastating for them, it might not be a problem for a majority of the world's population", Shepherd said.

"The last time we looked at the polar ice sheets, Greenland was the dominant contributor". He blames the burning of coal, oil and natural gas as the cause of global warming.

It also found that although the total area of sea ice surrounding Antarctica has shown little overall change during the satellite era, there are signs of a longer-term decline when mid-twentieth century ship-based observations are considered.

If the right decisions are not made to preserve Antarctica in the next ten years, the consequences will be felt around the world. The water nibbles at the floating edges of ice sheets from below.

"What these narratives show us is that reducing greenhouse gas emissions, in line with the Paris climate agreement, and implementing effective policy can still minimise change in the Antarctic environment and the rest of planet".

"The increasing mass loss that they're finding is really worrying, particularly looking at the West Antarctic, the area that's changing most rapidly and it's the area that we're most anxious about, because it's below sea level", said Christine Dow, a glaciologist at the University of Waterloo in Canada who was not involved in the research.

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.

Handshakes to kick off series at The Oval
New Australia boss Justin Langer has vowed his team will respect the line between banter and abuse in the series against England . Warner will join the commentary panel for the second game of the 5-match ODI series in Cardiff on June 16.

Like this: