This seems to be the latest alarmism and hysteria spread by the Global Warming hoax and Climate Change religion demagogues! This is again pseudoscience spread by a U.S. elite university!
Beware of the sea-level rise and ocean warming scare!
Just a few questions:
- How much of this is "Climate Change" driven speculation! Way too much!
- What about the rest of the huge continent Antarctica or the other glaciers? (Thwaites Glacier represents only 15% of the West Antarctic Ice Sheet)
- Once more as so many times dubious computer model projections were offered as facts!
- This study is based on perhaps the first ever such exploration underneath the ice shelf using a remotely operated submersible vehicle
Nobody in their right mind can probably claim these are unusual or not normal observations! What little do we still know about Antarctica! Plus, there have been reports that the ice shelf of this continent are actually growing etc.
"First-of-their-kind observations beneath the floating shelf of a vulnerable Antarctic glacier reveal widespread cracks and crevasses where melting occurs more rapidly, contributing to the Florida-sized glacier’s retreat and potentially to sea-level rise ...
Deploying the remotely operated Icefin underwater robot through a nearly 2,000-foot-deep borehole drilled in the ice, the team captured the first close-up views of the critical point near the grounding line where Thwaites Glacier in western Antarctica – one of the continent’s fastest changing and most unstable glaciers – meets the Amundsen Sea. ...
They found that flat sections covering much of the ice shelf’s base were thinning, though not as quickly as computer models had suggested. ...
provide new insight into melting processes at glaciers exposed to relatively warm ocean water, and promise to improve models predicting Thwaites’ potentially significant contribution to sea-level rise. ...
Since the 1990s, the Thwaites grounding line has retreated nearly 9 miles and the amount of ice flowing out of the 75-mile-wide region has nearly doubled, according to ITGC. Because much of the glacier sits below sea level, it is considered susceptible to rapid ice loss that could raise sea levels by more than 1.5 feet. Collapse of the ice sheet behind Thwaites could add substantially more, “with profound consequences for humanity,” according to BAS [British Antarctic Survey]. ..."
They found that flat sections covering much of the ice shelf’s base were thinning, though not as quickly as computer models had suggested. ...
provide new insight into melting processes at glaciers exposed to relatively warm ocean water, and promise to improve models predicting Thwaites’ potentially significant contribution to sea-level rise. ...
Since the 1990s, the Thwaites grounding line has retreated nearly 9 miles and the amount of ice flowing out of the 75-mile-wide region has nearly doubled, according to ITGC. Because much of the glacier sits below sea level, it is considered susceptible to rapid ice loss that could raise sea levels by more than 1.5 feet. Collapse of the ice sheet behind Thwaites could add substantially more, “with profound consequences for humanity,” according to BAS [British Antarctic Survey]. ..."
From the abstract:
"Thwaites Glacier represents 15% of the ice discharge from the West Antarctic Ice Sheet and influences a wider catchment. Because it is grounded below sea level Thwaites Glacier is thought to be susceptible to runaway retreat triggered at the grounding line (GL) at which the glacier reaches the ocean. Recent ice-flow acceleration and retreat of the ice front and GL indicate that ice loss will continue. The relative impacts of mechanisms underlying recent retreat are however uncertain. Here we show sustained GL retreat from at least 2011 to 2020 and resolve mechanisms of ice-shelf melt at the submetre scale. Our conclusions are based on observations of the Thwaites Eastern Ice Shelf (TEIS) from an underwater vehicle, extending from the GL to 3 km oceanward and from the ice–ocean interface to the sea floor. These observations show a rough ice base above a sea floor sloping upward towards the GL and an ocean cavity in which the warmest water exceeds 2 °C above freezing. Data closest to the ice base show that enhanced melting occurs along sloped surfaces that initiate near the GL and evolve into steep-sided terraces. This pronounced melting along steep ice faces, including in crevasses, produces stratification that suppresses melt along flat interfaces. These data imply that slope-dependent melting sculpts the ice base and acts as an important response to ocean warming."
Rapid melting is eroding vulnerable cracks in Thwaites Glacier’s underbelly Scientists have now explored a hard-to-reach ocean cavity under a crucial glacier in Antarctica
Fig. 1: Warm water reaches near the ice base and retreating GL of the TEIS
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