This year has been one of the warmest since 1850, despite the cooling influence of La Nina conditions, according to scientists.
The UK's Hadley Centre and University of East Anglia conclude that globally, this year ranks as the seventh warmest.
The 11 warmest years in this set have all occurred within the last 13 years. For the northern hemisphere alone, 2007 was the second warmest recorded.
The findings come as the UN climate summit discusses carbon emission cuts.
The Hadley Centre's head of climate prediction, Vicky Pope, who is at the Bali talks, said the data "confirmed the need for swift action to combat further rises in global temperatures because of human behaviour."
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