1. johnthescone
GHG metrics in the WGIII contribution to the AR5 Bonn, 03 April Jan Minx, Steffen Brunner & Ottmar Edenhofer

2. Assessment Approach IPCC principles2
Assessment Approach
IPCC principles
a comprehensive and scientifically sound review of the relevant literature;
the identification of disparate views for which there is significant scientific or technical support; and
a policy-neutral presentation of the scientific content in a manner relevant to policymakers.

3. Assessment approach Challenges for WGIII assessment:3
Assessment approach
Challenges for WGIII assessment:
No scientific resolution of value dissent
Impossible to distinguish facts and values neatly
High potentially fundamental uncertainties associated with long-term policy choices
Implications for WGIII assessment:
Communication of uncertainties both in quantitative and qualitative dimensions
Transparency of contested value-laden assumptions and implicit value judgments

4. IPCC and other scientific assessments4
Division of labour at the science-policy interface
IPCC and other scientific assessments
Adapted from: Edenhofer and Kowarsch, 2012

5. 5
The WGIII Assessment: Exploring the Solution Space – a mapping exercise
Goal A
Goal C
Goal B
Start

6. The Four Parts of the AR5 WG III Outline6
The Four Parts of the AR5 WG III Outline
Part I
Introduction
Part II
Framing Issues
Part III
Pathways for Mitigating Climate Change
Part IV
Assessment of Policies, Institutions and Finance

7. The Working Group III Assessment as a Cartography Exercise7
Part I
Introduction
Part II
Framing Issues
The legend to the map:
Explain concepts and methods of assessment
Part III
Pathways for Mitigating
Climate Change
The map:
Map out feasible mitigation option
Assess trade-offs
Part IV
Assessment of Policies,
Institutions and Finance
Navigation tools:
Assess policy instruments, institutional arrangements and finance options

8. 8
AR5 WG III Outline
I: Introduction
1. Introductory Chapter
2. Integrated Risk and Uncertainty Assessment of Climate Change Response Policies
3. Social, Economic and Ethical Concepts and Methods
4. Sustainable Development and Equity
II: Framing Issues
No dedicated chapter or Section on metrics in the Plenary approved Working Group III outline of the AR5
5. Drivers, Trends and Mitigation
6. Assessing Transformation Pathways
7. Energy Systems
8. Transport
9. Buildings
10. Industry
11. Agriculture, Forestry and Other Land Use (AFOLU)
12. Human Settlements, Infrastructure and Spatial Planning
III: Pathways for Mitigating Climate Change
13. International Cooperation: Agreements and Instruments
14. Regional Development and Cooperation
15. National and Sub-national Policies and Institutions
16. Cross-cutting Investment and Finance Issues
IV: Assessment of Policies, Institutions and Finance

9. Where will metrics be covered?9
Where will metrics be covered?
I: Introduction
1. Introductory Chapter
2. Integrated Risk and Uncertainty Assessment of Climate Change Response Policies
3. Social, Economic and Ethical Concepts and Methods
4. Sustainable Development and Equity
II: Framing Issues
5. Drivers, Trends and Mitigation
6. Assessing Transformation Pathways
7. Energy Systems
8. Transport
9. Buildings
10. Industry
11. Agriculture, Forestry and Other Land Use (AFOLU)
12. Human Settlements, Infrastructure and Spatial Planning
III: Pathways for Mitigating Climate Change
13. International Cooperation: Agreements and Instruments
14. Regional Development and Cooperation
15. National and Sub-national Policies and Institutions
16. Cross-cutting Investment and Finance Issues
IV: Assessment of Policies, Institutions and Finance

10. Assessment of metrics in context of WGIII contribution to AR510
Assessment of metrics in context of WGIII contribution to AR5
Be explicit about how metrics are used
Conceputal clarification of alternative emission metrics and their relationships – including both physical and more comprehensive economic metrics
Communicate underlying uncertainties and value judgments
Establish relationship alternative emission metrics to purpose of analysis
Quantiative comparisons and/or assessment of numerical values for alternative metrics as appropriate

11. Thank you for your attention!