Scientific understanding of climate change and consequences for a global deal

摘要

Most of this warming is due to the rising concentration of carbon dioxide and other anthropogenic gases (Solomon et al., 2007). It follows that a further increase in carbon dioxide concentration must lead to a further rise in global mean temperature (see Fig. 2). Considering a range of plausible assumptions about future emissions,this rise will be in a range from approximately 2°C to approximately 7°C above preindustrial levels.