Tag

Ice Sheet Dynamics

All articles tagged with #ice sheet dynamics

science7 days 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

science8 days 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

earth-science1 month ago•17 min saved

Hidden Basin Network Beneath East Antarctica Could Reshape Ice Flow

Researchers mapped a continent-scale bedrock system under East Antarctica—the East Antarctic Fan-Shaped Basin Province—comprising 30 pull-apart basins formed by distributed rotational extension. Using airborne gravity, magnetic surveys and seismic imaging, they suggest thinner, younger crust under much of the East Antarctic Ice Sheet, which could alter ice-flow patterns and heat transfer, with implications for ice-sheet stability and sea-level rise. The study, published in Nature Geoscience, challenges the idea of a single, stable crust beneath East Antarctica and underscores how hidden geology can influence the fate of Earth's freshwater ice.

via Gizmodo|

#antarctica #earth-science #geology

science3 months ago•4 min saved

Antarctic Granite Giant Revealed Beneath Pine Island Glacier

Researchers traced pink granite boulders on the Hudson Mountains to a hidden, roughly 100 km-wide and 7 km-thick granite body beneath Pine Island Glacier in West Antarctica. U-Pb zircon dating suggests the granite formed about 175 million years ago in the Jurassic, and airborne gravity surveys show a buried-granite density signature supporting the link. The discovery helps explain the past movement of the glacier and will improve models of West Antarctic Ice Sheet evolution and sea‑level rise.

via BBC Wildlife Magazine|

#antarctica #geology #granite

science9 months ago•7 min saved

Scientists uncover 85 active subglacial lakes beneath Antarctica's ice

Scientists using satellite data have discovered 85 new active lakes beneath Antarctica's ice, bringing the total to 231. These lakes periodically drain and refill, influencing glacier movement and potentially impacting global sea levels, which enhances understanding of ice sheet behavior and climate change effects.

via Live Science|

#antarctica #ice-sheet-dynamics #satellite-data