Similarly sobering conclusions are reached in the second paper, by Tim Lenton of the University of East Anglia and Naomi Vaughan of the Tyndall Centre for Climate Change Research, and published in Atmospheric Chemistry and Physics Discussions.

ECONOMIST: Geo-engineering

"These latest figures come amidst climate talks in Doha, but with emissions continuing to grow, it's as if no-one is listening to the scientific community, " said Corinne Le Quere, director of the Tyndall Centre for Climate Change Research at the University of East Anglia.

BBC: Carbon emissions are 'too high' to curb climate change