Vega Island’s bare ice shows why the season of a satellite image matters
NASA’s two views reveal a striking surface difference, but they are not a same-season annual comparison.
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Antarctica
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Antarctic sea-ice loss is leaving a saltier signature beneath the surface
A study links reduced seasonal meltwater with changes in Antarctic Intermediate Water. Surface ice maps and subsurface measurements tell different parts of the story.
Iceberg A-81 slows near South Georgia, where the unseen seabed matters
A new satellite account follows the berg’s route from the Brunt Ice Shelf. Slower movement is not yet proof of permanent grounding.