A cooling in the Pacific Ocean over the past decade has been the main cause of a pause in global warming in recent years, US research says.
Scientists have been puzzling over why global mean temperatures have not risen since a peak 15 years ago even as greenhouse gas emissions – with their potential to trap more of the sun's heat – have continued to increase.
That hiatus has spurred sceptics of human-induced climate change to declare that action to reduce carbon dioxide emissions was unwarranted or less urgent.
The US study, covering the decade of 2002-12 and published online by the journal Nature, found the levelling off of temperatures was caused by a preponderance of La Nina-like conditions that cooled waters in the central and eastern Pacific.
http://www.smh.com.au/environment/c...g-pause-caused-by-la-nina-20130829-2ss3p.html
One for Billc. :asian: