The reversibility of climate change has seen much discussion – in particular through consideration of scenarios that overshoot a warming target before being cooled through carbon sequestration. The uptake of heat into the deep ocean during warming can result in a lag in the response of global and local climate when warming is reversed. The impact of ocean heat uptake on climate reversibility can be efficiently investigated usi...

A key contribution to the latest generation of climate projections for the UK (UKCP18) was a perturbed parameter ensemble (PPE) of global coupled models based on HadGEM3-GC3.05. Together with 13 CMIP5 simulations, this PPE provides users with a dataset that samples modelling uncertainty and is ideal for use in impacts studies. Evaluations of global mean surface temperatures for this PPE have shown twenty-first century warming...