Oh sorry. Blue line is 2023. The red dotted line is “record minimum” in 2012. The rest are each year from 1979. The ones higher up, with a larger extent, are older.

There’s a tab top left to switch between Arctic and Antarctic: https://nsidc.org/arcticseaicenews/charctic-interactive-sea-ice-graph/

Each color is a different year. Here is is the graph from NSIDC:

• Antarctic Sea Ice Extent (Area of ociean with at least 15% sea ice)

From here (clicking on “Antarctic daily images” button on the right):

https://nsidc.org/arcticseaicenews/