• NSIDC's website will undergo planned maintenance on Wednesday, January 15, from 10 a.m. to 12 p.m. (U.S. Mountain Time). During this time, the NSIDC.org website and most NSIDC data access may be briefly unavailable.

sea ice maximum extent
the day of the year when the sea ice covers the largest area of the Arctic or Antarctic.
Topic(s):
sea ice