text: **Figure 1.**Changes of global temperature of 20 years moving average from 2020 to 2099 simulated by 5 ESMs 
  under 4 RCP scenarios. Note: The black horizontal dashed lines: global warming by 1.5 °C and 2.0 °C; the black 
  vertical solid line: the years when global warming reaches 1.5 °C and 2.0 °C simulated by the selected models 
  and scenarios. 