One of the Antarctic’s most important ice features faces inevitable melting that will contribute to climate change, researchers said on Monday.
They fear humans “may have lost control” of the West Antarctic Ice Sheet, meaning that even if efforts to control emissions are successful, its loss will continue to accelerate this century, a study published in Nature Climate Change found.
Study lead author Dr Kaitlin Naughten, from the British Antarctic Survey, said other research points to it contributing to a sea level increase of about one metre by 2100.
“Our study suggests that regardless of how much we reduce fossil fuels, melting of West Antarctic ice shelves – the floating parts of the ice sheet around the edges – can be expected to accelerate dramatically over the next century,” she told The National.
Warming oceans erode the ice sheet from underneath and this effect is most pronounced on the western side of the continent.
“The West Antarctic Ice Sheet is the most vulnerable part of Antarctica because most of it is below sea level,” Dr Naughten added.
“This means the ocean could melt its way beneath the glaciers and melt them from the bottom up. Even a tiny increase in ocean temperatures would lead to ice loss.”
If the entire West Antarctic Ice Sheet melted, it would contribute to a roughly five-metre rise in sea levels, though that scenario is considered unlikely, BAS said.
East Antarctica, which contains about 95 per cent of the continent’s ice, remains stable as far as scientists can see.
“It appears we may have lost control of the West Antarctic Ice Sheet melting over the 21st century,” she said.
“Our actions today likely will make a difference further down the line in the 22nd century and beyond, but that’s a timescale that probably none of us here will be around to see.”
A recent study found the amount of ice has been increasing there over the past 30 years, though it is rapidly melting in the west, with a net loss of about 7.5 trillion tonnes of ice.
“This is a sobering piece of research,” said Prof Alberto Naveira Garabato, an oceanographer at the University of Southampton.
“It illustrates how our past choices have likely committed us to substantial melting of the West Antarctic Ice Sheet and its consequent sea level rise – to which we will inevitably have to adapt as a society over coming decades and centuries.
“However, it should also serve as a wake-up call. We can still save the rest of the Antarctic Ice Sheet, containing about 10 times as many metres of sea level rise, if we learn from our past inaction and start reducing greenhouse gas emissions now.”
How much the melting will contribute to rising oceans is not as well understood as other polar regions such as the Greenland glaciers.
For the current study, Dr Naughten’s BAS team simulated four scenarios for the 21st century, imagining that emissions are either controlled to rein in the global temperature rise to 1.5°C or 2°C above pre-industrial levels or that emissions continue at a medium or high level.
Each scenario showed there would be widespread warming of the Amundsen Sea, which borders West Antarctica, resulting in faster melting of the ice sheets.
The various emissions pathways did not show much difference until around 2045 when the high-emissions simulation began to increase the rate of melting faster than the other scenarios.
The study suggests an inevitable rise of sea levels that will likely devastate many coastal communities if they do not adapt.
Millions of people around the world, who live by the coast, will either have to “build around” or abandon areas, Dr Naughten said,
Already in the UK the Welsh village of Fairbourne is scheduled for abandonment in the 2050s.
Other scientists cautioned against viewing the results of the study as being conclusive as they are based on a single model, but that it is in line with other similar studies.
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- Individuals must register on UAE Drone app or website using their UAE Pass
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What are the regulations?
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The Details
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UAE squad
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UAE tour of Zimbabwe
All matches in Bulawayo
Friday, Sept 26 – First ODI
Sunday, Sept 28 – Second ODI
Tuesday, Sept 30 – Third ODI
Thursday, Oct 2 – Fourth ODI
Sunday, Oct 5 – First T20I
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Our legal advisor
Rasmi Ragy is a senior counsel at Charles Russell Speechlys, a law firm headquartered in London with offices in Europe, the Middle East and Hong Kong.
Experience: Prosecutor in Egypt with more than 40 years experience across the GCC.
Education: Ain Shams University, Egypt, in 1978.
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Real estate tokenisation project
Dubai launched the pilot phase of its real estate tokenisation project last month.
The initiative focuses on converting real estate assets into digital tokens recorded on blockchain technology and helps in streamlining the process of buying, selling and investing, the Dubai Land Department said.
Dubai’s real estate tokenisation market is projected to reach Dh60 billion ($16.33 billion) by 2033, representing 7 per cent of the emirate’s total property transactions, according to the DLD.
Expert advice
“Join in with a group like Cycle Safe Dubai or TrainYAS, where you’ll meet like-minded people and always have support on hand.”
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“When you sweat a lot, you lose a lot of salt and other electrolytes from your body. If your electrolytes drop enough, you will be at risk of cramping. To prevent salt deficiency, simply add an electrolyte mix to your water.”
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