A study from Nature Geoscience used climate simulations that predicted that average temperatures around the globe could increase somewhere between 1.4 degrees and 3 degrees Celsius by 2050. No other analysis has anticipated that temperatures would rise that much within that short of a time period.
The study does a better job of factoring in uncertainties to arrive at their conclusion. Each of the purple lines in the chart above is a prediction of the increase in global temperatures. The darker shade of purple, the more likely the increase is to be within that range. The red line shows the generally accepted range of temperature increase estimated by experts. You can see the purple range is measurably higher than the currently accepted range.
If temperatures do rise that much faster it will have a profound impact on everyone and certainly on human security. Let’s hope we end up at the low end of their predicted range.