TECHNOLOGY
Scientists have identified Pine Island Glacier (PIG) as a major source for thinning ice in West Antarctica, which has contributed nearly 10% of global sea level rise.
Scientists have identified Pine Island Glacier (PIG) as a major source for thinning ice in West Antarctica, which has contributed nearly 10% of global sea level rise.
Researchers from the British Antarctic Survey (BAS), Lamont-Doherty Earth Observatory (LDEO) and the National Oceanography Centre, have reported new results from an investigation into Antarctica's potential contribution to sea level rise.
The new discovery has been made as part of a series of investigations.
Using Autosub (an autonomous underwater vehicle) to dive deep and travel far beneath the pine Island Glacier's floating ice shelf, scientists have captured ocean and sea-floor measurements, which revealed a 300m high ridge (mountain) on the sea floor.
As per the investigation, Pine Island Glacier has thinned and disconnected from the ridge, allowing the glacier to move ice more rapidly from the land into the sea.
This also permitted deep warm ocean water to flow over the ridge and into a widening cavity that now extends to an area of 1000 km-square under the ice shelf.
The warm water, trapped under the ice, is causing the bottom of the ice shelf to melt, resulting in continuous thinning and acceleration of the glacier.
"The discovery of the ridge has raised new questions about whether the current loss of ice from Pine Island Glacier is caused by recent climate change or is a continuation of a longer-term process that began when the glacier disconnected from the ridge," said lead author Dr Adrian Jenkins of British Antarctic Survey.
"We do not know what kick-started the initial retreat from the ridge, but we do know that it started some time prior to 1970. Since detailed observations of Pine Island Glacier only began in the 1990s, we now need to use other techniques such as ice core analysis and computer modelling to look much further into the glacier's history in order to understand if what we see now is part of a long term trend of ice sheet contraction. This work is vital for evaluating the risk of potential wide-spread collapse of West Antarctic glaciers," he added.
Co-author Stan Jacobs added: "Since our first measurements in the Amundsen Sea, estimates of Antarctica's recent contributions to sea level rise have changed from near-zero to significant and increasing. Now finding that the PIG's grounding line has recently retreated more than 30 km from a shallow ridge into deeper water, where it is pursued by a warming ocean, only adds to our concern that this region is indeed the 'weak underbelly' of the West Antarctic Ice Sheet.
Increased melting of continental ice also appears to be the primary cause of persistent ocean freshening and other impacts, both locally and downstream in the Ross Sea."
The results are published in the journal Nature Geoscience.
How I Can Make Your Child into an Ivy Leaguer: A Parent’s Guide to Success with Caroline Linger
Meet China’s newest billionaire, who runs bubble tea business, his net worth is Rs...
Top Government Schemes for Farmers, Artisans, and Students You Should Not Miss!
Why did RCB chose Rajat Patidar as captain over Virat Kohli? Team director Mo Bobat explains
Valentine’s Day 2025: Perfect last-minute gifts ideas for your partner
Man who saved Rishabh Pant's life in 2022 car accident, attempts suicide with girlfriend, she dies
FASTag New rule: All you need to know to avoid extra charges from February 17
Throwback: How did Rohit Sharma propose to Ritika Sajdeh? WATCH viral video
Did Ram Charan unfollow Allu Arjun after his father took a dig at Game Changer? Here's what we know
Who Are The Top 5 Most Influential Astrologers In India In 2025?
Delhi-NCR schools holiday: Are Delhi, Gurugram, Noida schools closed on Feb 14? Check here
THESE cricketers unfollowed Ranveer Allahbadia on social media amid India's Got Latent controversy?
‘Broke in 50 days’: Accenture employee-investor loses Rs 8 lakh in a day, his net worth is Rs…
Microsoft inaugurates new campus in THIS Indian city, plans to hire...
Shah Rukh Khan once bought laptop for Aamir Khan but he did not open it for...years because...
New Income Tax Bill 2025: FM Nirmala Sitharaman tables the new income tax bill in Lok Sabha
Emirates flight attendant's BTS video sparks firing rumours, airline responds, see post here
Anupam Mittal asks Namita Thapar to quit Shark Tank India because...: 'If you're...'
Meet comedian who was slapped, kicked out of film set by...; his net worth is now...
Top 3 iconic cricket rivalries
Couple recreates dance with same friend squad for sangeet after 10 years, watch viral video
Meet actor who served during Kargil War, put his career on hold for..., he is...
RCB captain announcement LIVE Updates: Rajat Patidar to lead team in IPL 2025
Ranveer Allahbadia cries in viral video over..., the truth behind it will shock you
Meet actress who is queen of Rs 500 cr club, set to enter again with..., she is...
Rohit Shetty teases 'biggest love story of 2025' feat Ranveer Singh and.., fans react
Hajj 2025: You can't take your children to Hajj this year due to...
Aly Goni supports Samay Raina because..., says he was forced to...
Students' farewell dance on SRK's 'Aankhein Khuli' steals the show, watch viral video
World’s longest railway station has 44 platforms, 67 tracks, has secret platform, located in…
New Income Tax Bill likely to be introduced in parliament today; here's what to expect
Meet IIT-JEE topper with 300 marks in JEE Mains Session 1 Result 2025, advices students not to...
Rozlyn Khan files defamation case against Ankita Lokhande: 'A woman who could use...'
PM Modi US visit: PM Modi arrives at Blair House, greets members of Indian diaspora
Meet son of billionaire whose net worth is Rs 77,280 crore, leads business empire in Australia as...
Happy Kiss Day 2025: Wishes, WhatsApp messages, images, quotes to share with your lover
Why Jasprit Bumrah was ruled out of Champions Trophy 2025? Report says Ajit Agarkar...
Meet woman, who studied 17-18 hours daily, cracked UPSC in sixth attempt with AIR..., she is...
DNA TV Show: Delhi Police searches for AAP MLA Amanatullah Khan in threat case
ICC Champions Trophy 2025 warm-up fixtures: Will India play any practice game before mega event?
Meet man, IIT graduate, who once worked at Google, OpenAI, now owns...
BTC X8 Bumex Review 2025: Scam or Legit Trading Platform? Quick facts
AR Rahman comments on future of music, worries about THIS genre: 'We have lost all…’
UPSC introduces changes in online application process after aspirants' complaints; check here
TRAI's BIG move, introduces new rules against pesky calls, messages, fines telcos for...
Vir Das breaks his silence on India’s Got Latent controversy: 'A good artist will always…'
Who was Kim Rieul? Korean designer behind BTS and MONSTA X’s modern hanboks passes away at 32
Trade Compliance Meets Cybersecurity: Forensic Strategies for Risk Management
Enabling governance to organizations within AWS marketplace: A look at private marketplace
R Madhavan makes BIG STATEMENT about his bank account: 'I don't know how much I have and...'
Asense Interior: Celebrating 11 Years of Redefining Luxury Interiors in Bengaluru
Snow Moon 2025: When and how to witness February's full moon tonight? Know here
Kiss Day 2025: Why do we celebrate this day? Know history and significance
DNA Verified: Is Rashtrapati Bhavan hosting a wedding for the FIRST time? Know truth here
India's retail inflation slows to 4.31 per cent in January due to...
WATCH: Maha Kumbh girl Mona Lisa starts training before filming her 1st movie alongside Anupam Kher
Radhika Merchant stuns in blue and green suit at MahaKumbh Mela, it costs Rs....