File:Map of projected global warming across the globe by the 2050s using the IPCC SRES A1b greenhouse gas emissions scenario. Data from CMIP3 (2007).jpg

English: The following description is based on the cited public-domain source: This map shows the average of a set of climate model experiments projecting changes in surface temperature for the period 2050-2059, relative to the period from 1971-1999. Future greenhouse gas emissions were fed into the climate models to project future temperature changes. In this temperature projection, emissions are based on the Intergovernmental Panel on Climate Change's emissions scenario "A1b". Scenario A1b assumes humans will roughly balance their use of fossil fuels with other, non-carbon emitting sources of energy.

All models project some warming for all regions, with land areas warming more than oceans. The image shows greatest warming in Arctic regions, with warming of around 6 to 9 °F.

Scenario A1b is an emissions projection based on plausible assumptions of how human development might progress over the 21st century. However, because emissions projections depend on the choices people make in the future (e.g., over future efforts on energy efficiency and choices over the use of fossil fuels), climate scientists can’t say with certainty how probable this temperature projection is. Greenhouse gas concentrations may grow at rates that are higher or lower than is projected in scenario A1b. Future temperature changes may therefore be larger or smaller than is projected in this map.

Projected changes in global mean temperature over the 21st century for the A1b scenario, along with two other scenarios, can be accessed at: File:Projected global warming over the 21st century using three SRES greenhouse gas emissions scenarios. Data from CMIP3 (2007).png.