The National Snow and Ice Data CEnter (NSIDC) Distributed Active Archive Center (DAAC) provides data and information on snow and ice processes, especially pertaining to interactions among snow, ice, atmosphere and ocean, in support of research on global change detection and model validation, and provides general data and information services to the cryospheric and polar processes research community. THe NSIDC DAAC is an integral part of the multi- agency-funded support for snow and ice data management service at NSIDC. The Moderate Resolution Imaging Spectroradiometer (MODIS) will be flown on the first Earth Observation System (EOS) platform in 1998. The MODIS Instrument Science Team is developing geophysical products form data collected by the MODIS instrument, including snow cover and sea ice products which will be archived and distributed by the NSIDC DAAC. The MODIS snow and ice mapping algorithms will generate global snow, lake ice and sea ice cover products on a daily basis. These products will augment the existing record of satellite-derived snow cover and sea ice products that began about 30 years ago. The characteristics of these products, their utility, and comparisons to other data sets are discussed. Current developments and issues are summarized.