Interactive by John Burn-Murdoch
This week scientists, policymakers and leaders meet in Stockholm to finalise The Physical Science Basis – the first part of the long-awaited fifth assessment report (known as AR5) by the UN’s Intergovernmental Panel on Climate Change. This, essentially, sets out the latest state of thinking on the impact of climate change and is the fifth of its kind in 25 years.
This report’s projections, like those of its predecessors, will be heavily scrutinised in keeping with the controversies that surround this field of science.
Here, we show how the projections for temperature and sea level rise set out in the fourth Assessment Report in 2007 compare with actual measurements. We can see that global average temperatures have not accelerated at the rate predicted in some scenarios but sea levels have risen at the upper end of predicted ranges.