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Generated with pictures from http://nohrsc.noaa.gov/nh_snowcover/data can be downloaded from ftp://sidads.colorado.edu/DATASETS/NOAA/G02158See also the Global Sea Ice Area time series,&#62; d=read.table("http://arctic.atmos.uiuc.edu/cryosphere/timeseries.global.anom.1979-2008")&#62; tail(d)            V1        V2       V3       V412778 2013.984 0.7913005 18.42697 17.6356712779 2013.986 0.8523080 18.39049 17.5381812780 2013.989 0.8819072 18.30466 17.4227512781 2013.992 1.0200537 18.33854 17.3184812782 2013.995 1.0612829 18.27418 17.2128912783 2013.997 1.0163171 18.14861 17.13230&#62; plot(d$V1,d$V3,type="l",ylab="Global Sea Ice Area, million km2")