Climate change commitment in the twenty-first and twenty-second centuries

The newly developed Community Climate System Model Version 3 (CCSM3) with increased horizontal resolution was used to address climate-change commitment. It was found that even if concentrations of all greenhouse gases (GHGs) were stabilized at year 2000 levels, 0.4°C more warming could still occur by the end of 21st century. At the end of 21st century, the warming in the tropical Pacific will resemble an El Nino-like response, likely due to cloud feedbacks in the model.