NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration, Version 2. CLIMATE APPLICATIONS: Cryosphere, climate modeling, ocean, atmosphere, biology, fisheries, native communities, shipping, natural resources, policymakers, national defense, educators, students, media, blogosphere, general public. OFFICIAL CITATION: Meier, W., F. Fetterer, M. Savoie, S. Mallory, R. Duerr, and J. Stroeve. 2013. NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration. Version 2. [indicate subset used]. Boulder, Colorado USA: National Snow and Ice Data Center. http://dx.doi.org/10.7265/N55M63M1. [date accessed].