File:Map of projected global warming across the globe by the 2050s using the IPCC SRES B1 greenhouse gas emissions scenario. Data from CMIP3 (2007).jpg

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Description
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 "B1" (see Special Report on Emissions Scenarios for more information on the B1 scenario).

Scenario B1 assumes that humans worldwide will make more sustainable development choices by using a greater range of, and more efficient, technologies for producing energy. In this scenario, carbon emissions are projected to increase from today’s rate of about 9 billion metric tons per year to about 12 billion tons per year in 2040, and then gradually decline again to 1990 levels—5 billion tons per year—by 2100.

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 8 °F.

Scenario B1 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 projected in scenario B1. Future temperature changes may therefore be larger or smaller than projected in this map.

File:Projected global warming over the 21st century using three SRES greenhouse gas emissions scenarios. Data from CMIP3 (2007).png shows projected changes in global mean temperature over the 21st century for three emissions scenarios, including the B1 scenario.
Date
Source Map of projected temperatures for IPCC Scenario B1, in ClimateWatch Magazine » Global Temperature Projections. NOAA Climate Portal.
Author Ned Gardiner, Hunter Allen, and Jay Hnilo
Permission
(Reusing this file)		 Privacy Policy, Disclaimer, and Copyright Notice: ngdc.noaa.gov: "As required by 17 U.S.C. 403, third parties producing copyrighted works consisting predominantly of the material produced by U.S. government agencies must provide notice with such work(s) identifying the U.S. Government material incorporated and stating that such material is not subject to copyright protection within the United States. The information on government web pages is in the public domain and not subject to copyright protection within the United States unless specifically annotated otherwise (copyright may be held elsewhere). Foreign copyrights may apply."
Other versions The above projection for Scenario B1 can be compared with projections based on two other emissions scenarios at File:Map of projected global warming across the globe by the 2050s. Projections based on three SRES greenhouse gas emissions scenarios. Data from CMIP3 (2007).jpg

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Public domain
This image is in the public domain because it contains materials that originally came from the U.S. National Oceanic and Atmospheric Administration, taken or made as part of an employee's official duties.

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current04:46, 7 October 2012Thumbnail for version as of 04:46, 7 October 2012888 × 474 (114 KB)Enescot (talk | contribs){{Information |Description ={{en|1=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 ...

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