Around the world Quote by Heidi Cullen
““The Fourth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC) synthesized the results from eighteen climate models used by groups around the world to estimate climate sensitivity and its uncertainty. They estimated that a doubling of CO2 would lead to an increase in global average temperature of about 5.4°F,””
About This Quote
Source Report: IPCC Fourth Assessment Report, 2007
The report aggregates many climate models to estimate that doubling CO₂ likely raises global temperatures by about 5.4°F, highlighting uncertainty in climate sensitivity.
In simple terms: Doubling CO₂ likely adds ~5°F to global temperature.
Key Takeaway
Recognize climate risk and act on emissions.
Themes
climate science
uncertainty
policy
environment
Mood
concerned
urgent
analytical
Type
scientific
informative
When to use this quote
- government policy planning
- educational outreach
- media reporting
- academic research
Key Concepts
climate sensitivity
model synthesis
risk assessment
Questions to Reflect On
- How should societies balance uncertainty with urgent action?
- What policies best address projected warming?
A Different Perspective
Models vary, and real-world impacts may differ from averages.
![“How reliable are the computer [climate] models on which possible future climates are based? Not very. All will agree that the task of modeling climate is vast, because of the estimates that have to be made and the rubbery quality of much of the data.” quote by Don Aitkin](https://sms4smile.com/quotes/img-quotes/6c9/don-aitkin-58443_agree_how-reliable-are-the-computer-climate-mo_2504201.jpg)
![“Human myopia cannot be overcome simply by well-meaning attempts to build [climate] models that purport to peer decades and centuries ahead. Action taken now, in anticipation of supposed long run trends, may concentrate on the wrong issues and make matters worse rather than better.” quote by Colin Robinson](https://sms4smile.com/quotes/img-quotes/6b2/colin-robinson-66433_action_human-myopia-cannot-be-overcome-simply-b_2243208.jpg)
