Subglacial Satellite Radar Unveils Vast Uncharted Freshwater Reservoirs Across Antarctica
Ground-penetrating synthetic aperture radar unearths massive dynamic aquifer systems beneath polar ice sheets, providing vital clues to ocean circulation patterns.
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Geophysicists analyzing multi-frequency synthetic aperture radar data collected by orbital observation platforms have mapped a previously undetected network of interconnected subglacial rivers and cavernous sedimentary aquifers beneath the Antarctic interior.
The study reveals that subglacial water pressure plays a significantly more dynamic role in regulating ice-stream velocity than was previously accounted for in global climate models. As geothermal heat fluxes interact with deep basal ice, lubrication beneath continental glaciers fluctuates across multi-year cycles, directly affecting ice-shelf discharge into the Southern Ocean.
