Sea Ice
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How old is that sea ice?
Ice-age colours track survival and movement, not every floe’s thickness. Learn what the oldest category in a grid cell reveals, conceals, and cannot promise.
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Extent and volume tell different ice stories
A worked example separates extent, area, and volume, then shows why wind, thickness estimates, seasonal timing, and model uncertainty can make ice graphs tell different stories.
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At the ice edge north of Svalbard
A careful reading of melt ponds, pressure ridges, kittiwakes, wildlife distance, and younger sea ice.