Using my nifty-difty equation for the fractional loss of a quantity that has a linear trend, Arctic sea ice volume is now down 45% since the record started in January 1979.
(Have I said yet how crappy Windows 10 is? And Excel 365? They are barely worth a beta release; I will never buy anything made by Microsoft ever again. Same with Hewlett Packard -- I bought an HP ENVY in late June for $700, and so much doesn't work on it that I'd like to throw it across my fence and be done with it. Extremely disappointing. I've bought HP products before -- a laptop and more than one printer -- but this product is a complete piece of junk. And, no, I'm not willing to spend endless hours on a phone with a technician trying to make all the mistakes better.)
Anyway, Arctic SIV is declining steadily and scarily. In less than just 40 years.