Thread by @Sustainable2050

Half of the Arctic is 10-20⁰C warmer than normal at the moment. A consequence of the enormous area of sea ice that melted away this summer.

https://twitter.com/rgatess/status/1314919662514180099

Slow seasonal regrowth of Arctic sea ice so far: extent now almost as low as in disaster year 2012.

Ah yes, and 10-20⁰C above normal is 18-36⁰F above normal.

I'm afraid this is what we'll see in future in large parts of the Arctic Ocean. When it becomes open water in summer, it'll take quite some time to refreeze. So you won't have a few days without ice, but months.

Also, the later date on which an ice cover starts to form again means it's thinner in spring. That means an earlier date of melting. And water absorbs more sunlight than ice, so more heat is captured by the ocean. Which means it's harder to refreeze in autumn.

Current extent of the Arctic sea ice compared to the average in the previous decades.

https://twitter.com/ZLabe/status/1314924740323074062?s=19

On its current very slow regrowth trend, Arctic sea ice extent will overtake (undertake?) 2012 within days, to become smallest-for-the-date on record.

nsidc.org/arcticseaicene…