The Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS Passive Microwave Data data set available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) has been updated through 31 December 2015.
Data Set DOI: https://doi.org/10.5067/8GQ8LZQVL0VL