The NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) is pleased to announce that Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS Passive Microwave Data, Version 1 data set has been updated through 31 December 2017. This data set provides a consistent time series of daily and monthly averaged sea ice concentrations beginning in October 1978.
Data set DOI: https://doi.org/10.5067/8GQ8LZQVL0VL