Is NASA’s ‘Key Takeaway’ on Arctic summer sea ice minima obsolete?

Tallbloke's Talkshop

Arctic sea ice [image credit: cbc.ca]
Recent data tell a somewhat different story to the one NASA want to put forward. The mean rate of change in September minima reduced to something akin to zero after 2007, maybe even a small (relative to the 1980 peak) rise.

‘Key Takeaway: Summer Arctic sea ice extent is shrinking by 12.6% per decade as a result of global warming’, says NASA.

But their own interactive ‘ANNUAL SEPTEMBER MINIMUM EXTENT’ graph (here) gives the game away. For example:

2007 minimum: 4.07 km. (lowest since 1979, at the time).
2021: 4.72 km.
2022: 4.67 km.

Only two of the last fifteen years (2012, 2020) were lower than 2007, the rest at least the same (2016) or upto 25% above.

Peak decline was from 1996-2007, about one solar cycle (SC 23). Those days seem to have gone, for now at least. The most…

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