I have been using http://www.ijis.iarc.uaf.edu/en/home/seaice_extent.htm
I would like to re-post one of the links that have been helpfully posted above and start a new thread, but I cannot find helpful data on either ice extent or mass from any source. JAXA is closest, but falls short.
I am left with telling my "group" that the last few years are an anomaly. BS, they will say.
So that you know, I am in Canada, where nobody gets Fox News, which is 1/2 of the U.S. viewership. Boomers here, by and large, still get their news from television and newspapers. Skeptics are deniers. Black is white. I thought the Internet would have some useful sales tools, but thus far, I haven't run across any. Which leads me to be concerned about government regulation, and Canada's tar sands in particular.