One of the most pernicious arguments from climate deniers is that “a few degrees” doesn’t have much of an effect. After all, if you raise the temperature of the room you’re sitting in by a “mere” 1°C (1.8°F), you might not even notice.
Nature notices. The fish notice.
Arctic sea ice has been in decline so long, and so far, that deniers have had to make up some truly ludicrous stories about it. They embarass themselves on the topic.
But for some time, they crowed about the actual increase of Antarctic sea ice. They rarely mentioned that its increase wasn’t as great as the Arctic decrease (or they outright lied and said it was). They also tended to add the Arctic and Antarctic extents together to form a global figure, because the Antarctic increase partly cancelled out the Arctic decrease, making it seem not so bad.
For now at least, they won’t be crowing.