Version 2.0 of the Sea Ice Concentration (SIC) Climate Data Record data sets from AMSR-E and AMSR2 (2002-2017) were released on 28 February 2018. The SIC Climate Data Record data set from SMMR, SSMI and SSMIS (1979 – 2015) have previously been released.
The data sets are available at
http://icdc.cen.uni-hamburg.de/1/projekte/esa-cci-sea-ice-ecv0.html
http://osisaf.met.no/p/ice/index.html#conc-reproc-v2
and in the CCI Data Portal
http://cci.esa.int/data