By Matt McGrath
Global temperatures are set to rise more than one degree above pre-industrial levels according to the UK’s Met Office.
Figures from January to September this year are already 1.02C above the average between 1850 and 1900.
If temperatures remain as predicted, 2015 will be the first year to breach this key threshold.
The world would then be half way towards 2C, the gateway to dangerous warming.
The new data is certain to add urgency to political negotiations in Paris later this month aimed at securing a new global climate treaty.