Space/Science — HabitableZone

Space/Science » in reply to Total, global sea ice at record low

re: global sea ice at record low

The accurate satellite measurements of Arctic ice only go back to 1979, too. The time before that ("direct observation") gets a bit fuzzier. Same for "global" measurements.

Still doesn't explain why both hemispheres are going in opposite directions.

I'm not seeing a lot of "catastrophe" in the graph you linked to.

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