Tag

Laurentide Ice Sheet

All articles tagged with #laurentide ice sheet

science2 months ago•11 min saved

Canada’s gravity puzzle: mantle dynamics take the lead over ice rebound

GRACE satellite data show that the Hudson Bay gravity low cannot be explained by glacial rebound alone; older ice-sheet models account for only about 25–45% of the anomaly, leaving a substantial portion attributed to deep mantle structure and slow convection beneath Laurentia. The mantle’s buoyancy and deep-root dynamics, not surface ice history, appear to shape the regional gravity field, though quantifying the split depends on rebound modeling and longer observation records from GRACE Follow-On.

via Space Daily|

#grace #gravity #hudson-bay

science4 months ago•4 min saved

Rising Shores: NASA Image Captures Ice-Age Rebound in James Bay Lowlands

A March 26, 2026 NASA ISS image of the James Bay Lowlands shows land rebounding after the Laurentide Ice Sheet, with beach ridges forming along the shore, vast peat bogs, and other glacial features as the surface rises about 10 mm per year near Hudson Bay and sea ice breaks up in late spring.

via NASA Science (.gov)|

#beach-ridges #glacial-isostatic-adjustment #james-bay-lowlands

space4 months ago•96 min saved

Tiny Arctic lake slices Canada's oldest ice cap, seen from space

A 2010 NASA Earth Observatory image shows Gee Lake bending across the snowy rim of the Barnes Ice Cap on Baffin Island, the last remnant of Canada’s ancient Laurentide Ice Sheet. The roughly 3.2-kilometer lake sits at the edge of a glacier up to 500 meters thick, where meltwater has carved grooves that appear as ridges across the ice. The Barnes Ice Cap, exposed in this scene as snow-free at the edge, dates back about 20,000 years and is shrinking like other Arctic glaciers due to warming temperatures; a 2017 study estimated most of the ice could disappear within about 300 years. The image illustrates how small melt lakes and glacial dynamics shape this ancient landscape and how the Laurentide legacy continues to influence oceans and sea-level rebound today.

via Live Science|

#barnes-ice-cap #climate-change #earth-observation