New research from the World Meteorological Organization (WMO) suggests that the past decade has been the warmest ever recorded, with 2009 to be confirmed as one of the 10 warmest years ever recorded.
The global combined sea surface and land surface air temperature for January–October 2009 is estimated to be 0.44°C ± 0.11°C above the 1961–1990 annual average of 14.00°C. This would make 2009 the fifth warmest year on record.
WMO data suggests that the first decade of the new century was warmer than the decade spanning the 1990s , which in turn was warmer than the 1980s.
According to scientific measurements, Arctic sea ice has declined dramatically over the past 30 years.
Arctic sea ice extent during the 2009 melt season was 5.10M km2, which is the third-lowest on record after the 2007 record (4.3M km2) and 2008 (4.67M km2), since satellite measurements began in 1979.