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East Antarctica

All articles tagged with #east antarctica

science1 month ago•13 min saved

Buried fan-shaped basin beneath East Antarctica hints at Gondwana breakup scars

Scientists mapped a giant, fan-shaped set of basins beneath East Antarctica using sub-ice topography, gravity, magnetic and seismic data, suggesting a cohesive tectonic province formed by distributed rotational extension before Gondwana split. The proposed East Antarctic Fan-Shaped Basin Province may represent a continent-scale scar that helped guide the Antarctica–Australia separation and influence ice-flow patterns, though the timing and full implications remain uncertain and require further testing.

via Space Daily|

#east-antarctica #gondwana #ice-sheet-dynamics

science1 month ago•5 min saved

Hidden East Antarctic Fan-Shaped Basin Rewrites Gondwana's Breakup

Scientists using radar, gravity, magnetic surveys, seismic data and modeling have identified a giant, fan-shaped network of buried basins beneath East Antarctica, now named the East Antarctic Fan-Shaped Basin Province (EAFBP). This continent-scale structure links Wilkes, Aurora, and Lake Vostok basins, suggesting a single, long-deformed crust formed by distributed rotational extension. The find reshapes understanding of Gondwana's breakup and indicates the buried topography influences ice flow and could affect future sea-level rise projections, though precise timing remains uncertain and more seismic work is needed.

via The Times of India|

#crustal-deformation #east-antarctic-fan-shaped-basin-province #east-antarctica

science2 months ago•112 min saved

Giant fan-shaped subglacial basin under East Antarctica rewrites tectonic history

Researchers have identified a giant, fan-shaped subglacial basin province beneath East Antarctica, formed by distributed rotational extension that connects major basins such as Wilkes, Aurora, and the Lake Vostok region; this may reflect Gondwana breakup and indicates East Antarctica has a more dynamic tectonic history than previously thought, with possible implications for how the ice sheet responds to climate change.

via Live Science|

#east-antarctica #gondwana #nature-geoscience

science2 months ago•6 min saved

Antarctica’s Hidden Fan Reveals Ancient Subglacial Blueprint

Scientists mapped about 30 connected basins beneath East Antarctica, forming a fan-shaped province (EAFBP) that radiates from a central South Pole area. The radially arranged basins point to rotational extension that predates Gondwana’s breakup and may have guided ice movement and landscape evolution, reshaping our understanding of Antarctica’s bedrock and its history.

via ScienceAlert|

#east-antarctica #gondwana #ice-flow

science-and-environment2 years ago•3 min saved

Unveiling an Ancient Landscape: Antarctica's Hidden Secrets Revealed

Satellite data has revealed an ancient, river-carved landscape preserved beneath East Antarctica's ice sheet, providing a snapshot of the region before glaciers covered the continent. The data shows that a patch adjacent to the Aurora and Schmidt subglacial basins has remained largely unscathed for up to 34 million years. The landscape consists of three blocks of land separated by U-shaped valleys, likely formed when the ancient supercontinent Gondwana broke up. Understanding the shape of the landscape will help researchers predict the fluctuations of the East Antarctic ice sheet in a warming world.

via Space.com|

#ancient-landscape #east-antarctica #glaciers

earth-and-environment3 years ago•4 min saved

Unveiling the Impact of Thinning Ice Sheets on Subglacial Waters

A multinational team of researchers has used data from multiple sources to map the pathways of warm water that reaches the cavity of East Antarctica's Totten Glacier. The study provides valuable insights into the physical processes controlling the melting of the glacier and highlights the importance of bathymetry and regional circulation in regulating ocean heat transport. The findings can help improve modeling and understanding of the glacier's contribution to global sea-level rise.

via Phys.org|

#earth-and-environment #east-antarctica #ice-melting