The Snow Melt Onset Over Arctic Sea Ice from SMMR and SSM/I-SSMIS Brightness Temperatures, Version 4 data set will be retired from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) on 28 February 2023. Access to the data will no longer be available, but the data set documentation will remain available for future reference. We recommend using the newest version of the Snow Melt Onset Over Arctic Sea Ice from SMMR and SSM/I-SSMIS Brightness Temperatures data set (https://nsidc.org/data/nsidc-0105/versions/5) as an alternative.
Data set DOI: https://doi.org/10.5067/A9YK15H5EBHK