The National Snow and Ice Data Center

http://nsidc.org/

has provided a new data analysis tool

http://nsidc.org/arcticseaicenews/charctic-interactive-sea-ice-graph/

That allows the user to interactively display or suppress complete Arctic sea ice curves and averages for the 3 decade time period over which satellite data has been collected. This allows the analyst to compare year to year ice cover graphically, using different colored curves, to easily extract general trends from noisy data. You can plot every year, every other year, every nth year, only the high or low years, relate the ice cover to sunspot number or the stock market, however you want to slice the data.

Try it. Its a lot of fun.