- Between 1901–2012, “almost the entire globe has experienced surface warming… Each of the last three decades has been successively warmer at the Earth’s surface than any preceding decade since 1850.”
- ”The rate of sea level rise since the mid-19th century has been larger than the mean rate during the previous two millennia…. It is virtually certain that global mean sea level rise will continue beyond 2100.”
- ”Atmospheric concentrations of CO2, methane, and N2O have increased to levels unprecedented in at least the last 800,000 years….Most aspects of climate change will persist for many centuries even if emissions of CO2 are stopped.”
- “Heat waves are very likely to occur more frequently and last longer…. Extreme precipitation events…will very likely become more intense and more frequent by the end of this century.”
- ”A nearly ice-free Arctic Ocean in September before mid-century is likely.”
- “Continued emissions of greenhouse gases will cause further warming and changes in all components of the climate system…. Limiting climate change will require substantial and sustained reductions of greenhouse gas emissions.”
The full report and summary for policy makers.
