Temperature Projections

Temperature Projections

IPCC projections of global temperature increase. Solid coloured lines are multi-model global averages of surface warming (relative to 1980-1999) for emission scenarios B1, A1B and A2, shown as continuations of the 20th century simulations (black line). The coloured shading denotes the ±1 standard deviation range of individual model annual averages. The grey bars at right indicate the best estimate (solid horizontal line within each grey bar) and the ‘likely range’ across 6 scenarios that span the full range of all IPCC emission scenarios. (Adapted from Figure SPM-5, IPCC 2007).

Notes


The IPCC (International Panel on Climate Change) is the leading global body of scientists who report on science relating to climate change. As you can see, the different socio-economic scenarios have a wide range and there is a broad band around each of those scenarios, so there is uncertainty as to the impacts. However there will be impacts, and their severity is very much dependent on what we do now and over the forthcoming years.