Fortunately that’s not at all difficult to do. The US ‘National Snow and Ice Data Center’, supported by NASA and the US National Science Foundation, provides daily and monthly updates of the ice cover at the Poles using satellite microwave imagery. Plots of the data show that the North Polar ice cover trend line is about 4% below the 1979–2000 mean and falling at a rate of about 3% per decade over the period since 1980. The plot of the Southern Polar ice cover trend is, however, about 9% above the mean over the 1979–2000 period and rising at about 5% per decade.
Peter Gallagher is student of piano and photography. He was formerly a senior trade official of the Australian government. For some years after leaving government, he consulted to international organizations, governments and business groups on trade and public policy.
He teaches graduate classes at the University of Adelaide on trade research methods and the role of firms in trade and growth and tweets trade (and other) stuff from @pwgallagher