Question: If we don't even know the Arctic ice volume now, how could we pretend to know the Arctic ice volume in the year 1010?

Aircraft Does Flybys to Analyze Arctic Ice Thickness - Softpedia

The end goal of the investigation is to create a clear image of the ice sheets at the targeted locations, in such a way that those modeling climate change using computers will no longer have to rely only on statistics data in their work.
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“I'm very keen on seeing the results of the sea ice thickness measurements. Only when we know the distribution of ice of varying thickness can we calculate how much freshwater is carried out of the Arctic Ocean via ice,” the expert adds.

Flashback: Arctic poised to see record low sea ice volume this year « Climate Progress

Trends in multi-year ice — ice volume — are what matter most in terms of the long-term survivability of the Arctic ice in the summer