Year-To-Date Average Sea Ice Extent

The Year–To–Date average extent is still 6th lowest for sea ice in the Arctic, but the YTD graph seems likely to peak record early this year, and maybe even before April. It peaks when today’s extent is lower than the average so far this year.

Q: Where’s the data source for this plot?
A: Here: https://ads.nipr.ac.jp/vishop/#/extent
Q: How can anyone make a year-to-date average graph?
A: Easy. Use a computer. Add all the ice for every day so far this year, divide by the number of days.
Q: Why would I even do that?
A: Let’s say you want to know how much ice we have in 2019 compared to other years.