NSIDC's "Charctic" Interactive Arctic Sea Ice Extent Chart with two base periods: 1979-2000 and 1981-2010

http://nsidc.org/arcticseaicenews/charctic-interactive-sea-ice-graph/

Click on years 1999 thru 2013 (except for 2001 so unclick it, cuz we are cherrypicking), then see what happens when you switch between the two baselines!

This link will be added to the links in the blog's left column.