, the director of NASA's Goddard Institute for Space Studies
(GISS), 2010 may not wind up being the hottest year in the modern temperature record after all. In an analysis
posted last week, Hansen said the onset and intensification of La Nina
conditions in the Pacific Ocean have cooled global average surface temperatures, and despite the record heat in the first eight months of the year, 2010 may wind up either tied with or behind 2005, currently the warmest year in the GISS analysis.
Other climate research institutions, including the U.S. National Oceanic and Atmospheric Administration (NOAA) also keep such records and typically rank years slightly differently. For example, in the GISS analysis, June-July-August 2010 was the fourth warmest on record, but according to NOAA's methods it was the second warmest.
"It is likely that the 2005 and 2010 calendar year means will turn out to be sufficiently close that it will be difficult to say which year was warmer, and results of our analysis may differ from those of other groups," Hansen wrote. "What is clear, though, is that the warmest 12-month period in the GISS analysis was reached in mid-2010."
Click source to read FULL report by Andrew Freedman