It's not measurable, that's one of the problems the climate change proponents have along with the fact that their own scientific history shows that the Earth changes climate anyway and sometimes more quickly and dramatically than what they've allegedly recorded in the brief time they've been taking measurements. It's all bunk. It's 2017, people. Time to wake up from this nonsense.
Leave it to Forbes to find an author that's willing to cherry pick the data.
Here's an actual scientist at NASA interpreting the data: Sea Ice Extent Sinks to Record Lows at Both Poles.
Oops.
Eat yo vegetables
Ah, sorry, my bad. All the scientific papers behind it are a hoax. Just like the measurements of Earth being round going all the way back to antiquity I suppose. Only things like YouTube videos of abject morons holding a spirit level on a plane count as real evidence.
The Climate Accords where hurting poor Barron, he's only 11 years old. It was sick and had to go!