2015 the hottest year on record by 'quite a big jump' – video

Deke Arndt of the US National Oceanic and Atmospheric Administration says 2015 was the warmest year since records began and climate trends have severe implications for 2016. Human-made global warming and a boost from El Nino have contributed, say scientists. Data released on Wednesday by Britain's Met Office shows the average global temperature in 2015 was 0.75C higher than the long-term average between 1961 and 1990, much higher than the 0.57C in 2014, which itself was a record. The Met Office also expects 2016 to set a new record, meaning global temperature records will have been broken for three years running