Year-To-Date Average Sea Ice Volume

The average for the year for Arctic sea ice volume is now up from 6th lowest last week to 7th per March 15th. These are however still early days, and a 74–day average, while much more reliable than just a daily figure, is a lot less indicative of where the year is going than, say, a 100–day or 200–day average. This could still go either way!

Q: Where’s the data source for this plot?
A: Here: http://psc.apl.uw.edu/research/projects/arctic-sea-ice-volume-anomaly/data/
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.