January 25th, 2012
Warmer than average global surface temperatures in 2011 added up to make the year the 9th warmest on record, or since 1880, when modern record-keeping began, according to NASA.
The finding, according to NASA scientists at the Goddard Institute for Space Studies (GISS), confirms that the Earth’s temperatures are warming overall, with 9 of the 10 warmest years occurring since 2000. The only 20th Century year in the top ten was 1998. (2005 and 2010 tied for the hottest year(s) on record.)