Telegraph: The Nasa figures showed an increase in winter sea ice this year to 5.85 million square miles, 282,000 square miles above the record low of 2006. However this is still the fifth lowest on record and 278,000 square miles less than the average extent for 1979 to 2000. The ice is also thinner than ever. Just ten per cent of the ice is two-years-old or more, compared to an average 30 per cent thicker coverage between 1981 and 2000, meaning the volume of ice is probably lower than it …