NASA Goddard Institute for Space Studies: 2010 to Date Hottest On Record
The 12-month running mean global temperature in the GISS analysis has reached a new record in 2010. The new record temperature in 2010 is particularly meaningful because it occurs when the recent minimum of solar irradiance (Frohlich, 2006; data at pmodwrc.ch) is having its maximum cooling effect. At the time of this writing (May 2010) the tropical Pacific Ocean has changed from El Nino conditions to ENSO-neutral and is likely headed into the cool La Nina phase of the Southern Oscillation. The 12-month running mean global temperature (Figure 9b) may continue to rise for a few more months before the ENSO change causes the next decline. It is likely that global temperature for calendar year 2010 will exceed the 2005 record, but that is not certain if a deep La Nina develops quickly.