File:Radiative-forcings.svg

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Summary

Description

Global average radiative forcing estimates and ranges in 2005 for anthropogenic greenhouse gases and other important agents and mechanisms.

Understanding global warming requires understanding the changes in climate forcings (radiative forcing) that have occurred since the industrial revolution. These include positive forcing from increased greenhouse gases, negative forcing from increased sulphate aerosols and poorly constrained forcings from indirect aerosol feedbacks as well as minor contributions from solar variability and other factors. The poorly constrained aerosol effects results from both limited physical understanding of how aerosols interact with the atmosphere and limited knowledge of aerosol concentrations during the pre-industrial period. This is a significant source of uncertainty in comparing modern climate forcings to past states.

Contrary to the impression given by this figure, it is not possible to simply sum the radiative forcing contributions from all sources and obtain a total forcing. This is because different forcing terms can interact to either amplify or interfere with each other. For example, in the case of greenhouse gases, two different gases may share the same absorption bands thus partially limiting their effectiveness when taken in combination.

Source

The figures used to generate this plot were obtained from the IPCC Working Group I Fourth Assessment Report Summary for Policymakers, page 16. [1]

Author

This figure was produced by Leland McInnes (Radiative-forcings.svg) using gnuplot and Inkscape and is licensed under the GFDL. All data is from publicly available sources.

Permission
(Reusing this file)

Leland McInnes at the English-language Wikipedia, the copyright holder of this work, hereby publishes it under the following license:

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.

	This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
	Attribution: Leland McInnes
	You are free: to share – to copy, distribute and transmit the work to remix – to adapt the work Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
	This licensing tag was added to this file as part of the GFDL licensing update.CC BY-SA 3.0truetrue

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File history

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	Date/Time	Dimensions	User	Comment
current	16:32, 19 May 2023	600 × 480 (48 KB)	Great Brightstar	Use Unicode subscripts and superscripts
	16:17, 19 May 2023	600 × 480 (48 KB)	Great Brightstar	Fix regressions
	16:11, 19 May 2023	600 × 480 (49 KB)	Great Brightstar	Remove something duplicated
	05:50, 10 December 2018	600 × 480 (58 KB)	Mikhail Ryazanov	punct., fmt.
	12:06, 8 March 2016	600 × 480 (58 KB)	Nyq	Decapitalized common nouns
	14:22, 2 August 2007	600 × 480 (58 KB)	Blinking Spirit	{{GFDL-user-w\|en\|Wikipedia in English\|Leland McInnes}}