Primary Sea Ice Edge from Satellite Passive Microwave Observations

These are matlab output files with smoothed and unsmoothed  primary ice edges around Antarctica.  The primary ice edge is defined as the northernmost contour of 15% sea ice concentration, and defines the outer boundary of sea ice extent.  The brightness data come from three satellites; SSM/I, AMSR-E, and AMSR2 and are converted to sea ice concentrations with the NASA Team 2 algorithm and the ARTIST algorithm.