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NASA space lasers map meltwater lakes in Antarctica with striking precision

NASA space lasers map meltwater lakes in Antarctica with striking precision
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Roland warnerMatthew siegfriedHelen amanda frickerGeophysical research lettersEarth science news teamAustralian antarctic program partnershipUniversity of tasmaniaColorado school of minesUniversity of california san diegoEuropean space agencyScripps institution of oceanographyUs geologicalAntarctic ice sheetWest antarcticSouthern oceanElevation satellite

Melt lakes: Scientists detect sudden large Antarctic water mass drains empty

Hydro-fracture occurs when liquid water, denser than ice, exerts sufficient extra pressure on cracks in ice shelves to open them right through to the ocean below. Scientists in Australia and the United States are reporting the sudden loss of a large ice-covered Antarctic lake covering an area of eleven square kilometres. The rare event occurred during the winter of 2019 on Amery Ice Shelf in East Antarctica and was noticed in satellite images the following summer by Dr Roland Warner from the Australian Antarctic Program Partnership at the University of Tasmania. Dr Warner said that the event, detailed in a paper just published in Geophysical Research Letters, was most likely caused by a process known as ‘hydro-fracturing’.

Niagara fallsWestern australiaUnited statesNew south walesJonathan kingslakeRoland warnerJulian spergelGeophysical research lettersUniversity of tasmaniaAustralian antarctic program partnershipLamont doherty earth observatory at columbia universityUniversity of california san diegoPolar geospatial centreUniversity of minnesotaScience teamAmery ice shelf

How a lake on an Antarctic ice shelf disappeared in three days

TORONTO In 2019, a lake on an ice sheet in East Antarctica vanished completely over the course of three days. The strange occurrence went unnoticed until the next summer, when Dr. Roland Warner, a glaciologist with the Australian Antarctic Program Partnership at the University of Tasmania, noticed discrepancies in satellite images of the Amery Ice Shelf. As he investigated further, he and other researchers concluded that something rare had happened: a hydrofracture. “We believe a large crack opened briefly in the floating ice shelf and drained the entire lake into the ocean within three days,” Warner said in a news release.

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Enormous Antarctic Lake Mysteriously Drains Through Ice Shelf

Enormous Antarctic Lake Mysteriously Drains Through Ice Shelf
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Huge Lake in East Antarctica Disappears in A Week, Crack in the Ice Shelf is Suspected Cause

Huge Lake in East Antarctica Disappears in A Week, Crack in the Ice Shelf is Suspected Cause
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Roland warnerHelen amanda frickerNational geographic cartographers add the southern oceanUniversity of tasmaniaAustralian antarctic program partnershipScripps institution of oceanographySan diegoEast antarcticaAmanda frickerScripps institutionAmery ice shelfNational geographic cartographers addSouthern oceanWorld mapஹெலன் அமண்டா ஃப்ரிகர்பல்கலைக்கழகம் ஆஃப் டாஸ்மேனியா