Jan. 28, 2008: Last Year Ranks Among Warmest Years on Record
Regardless of the rankings, the two agencies agree that the eight warmest years on record have all occurred since 1998, making the past decade a clear record-breaker. And as GISS notes, the warmth in 2007 occurred despite solar irradiance (the amount of energy Earth receives from the sun) reaching a minimum and a strong La Nina episode (a cooling in the equatorial region of the Pacific Ocean) developing late in the year, both factors that would tend to push down global temperatures. The year started with a warming boost from an El Nino event, which is a warming in the equatorial region of the Pacific Ocean, but that phenomenon faded quickly, confounding some predictions for 2007 to be a record-breaking year.
Publication date: 01/28/2008