This groundbreaking SEI report from 1990 is the key source of the 2 degree climate target in international climate policy. The report was a product of the Advisory Group on Greenhouse Gases (AGGG), which was both forerunner and co-creator of the Intergovernmental Panel on Climate Change (IPCC). Limiting global warming to no more than two degrees above pre-industrial levels has now become the de facto target for international climate policy.
A coherent set of indicators is needed to determine the rate and extent of climatic change and to provide a yardstick for measuring progress in controlling the greenhouse effect. Indicators are also indispensable to detect instabilities in the climate system. Current estimates are essentially based on simple extrapolations of linear representations of a dynamic system with numerous surprises, introducing even greater risks that should be considered when defining targets.
Although important scientific uncertainties remain, they should not keep us from implementing policies that would help achieve the targets identified here. Rather, the uncertainties should be used as a reason to periodically review and adjust targets.
The authors of this report provided drafts of their contributions. These drafts were discussed at a review workshop in Rotterdam, April 25-27, 1990, in which several additional reviewers participated. The participants in this workshop examined the results, and developed a consensus on the recommended indicators and targets for climatic change. The Executive Summary of the report was written at the workshop. After the workshop the various contributions were revised, and edited for consistence and coherence.
SEI report / This report provides guidance for Malmö to leverage sufficiency-oriented approaches to reduce consumption-based emissions and engage citizens in climate action.
Other publication / How Brazil–China cooperation can reshape agricultural trade, reduce deforestation risks and drive more sustainable global supply chains.
Perspective / This perspective argues for a systemic approach by integrating mitigation and adaptation by default into every policy, budget and planning decision.
