A new climate change report from the Met Office and its US equivalent has provided the "greatest evidence we have ever had" that the world is warming. The report brings together the latest temperature readings from the top of the atmosphere to the bottom of the ocean
Usually scientists rely on the temperature over land, taken from weather stations around the world for the last 150 years, to show global warming. But climate change sceptics questioned the evidence, especially in the wake of recent scandals like "climategate".
Now for the first time, a report has brought together all the different ways of measuring changes in the climate. The ten indicators of climate change include measurements of sea level rise taken from ships, the temperature of the upper atmosphere taken from weather balloons and field surveys of melting glaciers.
New technology also means it is possible to measure the temperature of the oceans, which absorb 90 per cent of the world's heat.
The State of the Climate report shows “unequivocally that the world is warming and has been for more than three decades”.