Open Data
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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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When an Arctic river turns orange
Thaw, mineral exposure, changing river chemistry, and the limits of sparse water-quality monitoring.
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Measuring a glacier in footsteps
Ablation stakes, mass balance, the 2025 Greenland result, and the patient work of repeated measurement.
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Move your money and your voice
Questions for pensions, banks, procurement, voting, and community action without simple good-or-bad labels.