1. Head, WGI Technical Support Unit
IPCC AR6 Working Group I
Anna Pirani
Head, WGI Technical Support Unit

2. Large-scale climate change
WGI Outline
Summary for Policy Makers
Technical Summary
Chapter 1: Framing, context, methods
Chapter 2: Changing state of the climate system
Chapter 3: Human influence on the climate system
Chapter 4: Future global climate: scenario-based projections and near-term information
Chapter 5: Global carbon and other biogeochemical cycles and feedbacks
Chapter 6: Short-lived climate forcers
Chapter 7: The Earth’s energy budget, climate feedbacks, and climate sensitivity
Chapter 8: Water cycle changes
Chapter 9: Ocean, cryosphere, and sea level change
Chapter 10: Linking global to regional climate change
Chapter 11: Weather and climate extreme events in a changing climate
Chapter 12: Climate change information for regional impact and for risk assessment
Annexes incl. options for a Regional Atlas and Technical Annexes
Glossary
Index
Large-scale climate change

3. WGI Outline Climate processes Summary for Policy Makers
Technical Summary
Chapter 1: Framing, context, methods
Chapter 2: Changing state of the climate system
Chapter 3: Human influence on the climate system
Chapter 4: Future global climate: scenario-based projections and near-term information
Chapter 5: Global carbon and other biogeochemical cycles and feedbacks
Chapter 6: Short-lived climate forcers
Chapter 7: The Earth’s energy budget, climate feedbacks, and climate sensitivity
Chapter 8: Water cycle changes
Chapter 9: Ocean, cryosphere, and sea level change
Chapter 10: Linking global to regional climate change
Chapter 11: Weather and climate extreme events in a changing climate
Chapter 12: Climate change information for regional impact and for risk assessment
Annexes incl. options for a Regional Atlas and Technical Annexes
Glossary
Index
Climate processes

4. Regional climate information
WGI Outline
Summary for Policy Makers
Technical Summary
Chapter 1: Framing, context, methods
Chapter 2: Changing state of the climate system
Chapter 3: Human influence on the climate system
Chapter 4: Future global climate: scenario-based projections and near-term information
Chapter 5: Global carbon and other biogeochemical cycles and feedbacks
Chapter 6: Short-lived climate forcers
Chapter 7: The Earth’s energy budget, climate feedbacks, and climate sensitivity
Chapter 8: Water cycle changes
Chapter 9: Ocean, cryosphere, and sea level change
Chapter 10: Linking global to regional climate change
Chapter 11: Weather and climate extreme events in a changing climate
Chapter 12: Climate change information for regional impact and for risk assessment
Annexes incl. options for a Regional Atlas and Technical Annexes
Glossary
Index
Regional climate information

5. Proposed WGI Outline Cross-chapter coordination
Summary for Policy Makers
Technical Summary
Chapter 1: Framing, context, methods
Chapter 2: Changing state of the climate system
Chapter 3: Human influence on the climate system
Chapter 4: Future global climate: scenario-based projections and near-term information
Chapter 5: Global carbon and other biogeochemical cycles and feedbacks
Chapter 6: Short-lived climate forcers
Chapter 7: The Earth’s energy budget, climate feedbacks, and climate sensitivity
Chapter 8: Water cycle changes
Chapter 9: Ocean, cryosphere, and sea level change
Chapter 10: Linking global to regional climate change
Chapter 11: Weather and climate extreme events in a changing climate
Chapter 12: Climate change information for regional impact and for risk assessment
Annexes incl. options for a Regional Atlas and Technical Annexes
Glossary
Index
Cross-chapter coordination
e.g. weather and climate extremes
Key large-scale indicators
Air pollution extremes
Large-scale patterns of water cycle extremes
Extreme sea levels
Regional
Changing hazards

6. Proposed WGI Outline Summary for Policy Makers Technical Summary
Chapter 1: Framing, context, methods
Chapter 2: Changing state of the climate system
Chapter 3: Human influence on the climate system
Chapter 4: Future global climate: scenario-based projections and near-term information
Chapter 5: Global carbon and other biogeochemical cycles and feedbacks
Chapter 6: Short-lived climate forcers
Chapter 7: The Earth’s energy budget, climate feedbacks, and climate sensitivity
Chapter 8: Water cycle changes
Chapter 9: Ocean, cryosphere, and sea level change
Chapter 10: Linking global to regional climate change
Chapter 11: Weather and climate extreme events in a changing climate
Chapter 12: Climate change information for regional impact and risk for assessment
Annexes incl. options for a Regional Atlas and Technical Annexes
Glossary
Index
Link to WGII
Link to WGIII

7. Working Group 1

8. How the IPCC produces its reports?
AR6 main approval Scoping, May 2017
AR6 main approval Montreal September 2017
Literature cut-off
dates for AR6 WGI (not decided)
Papers submitted : 31 January 2020
Papers accepted 15 Oct 2020
 The outlines send signals to the scientists
Nye men fremdeles foreløpige er : 31 januar og 15 OKT 2020.
>> On 25 Apr 2017, at 06:42, PIRANI Anna wrote:
>>
>> Hi Jan,
>> the dates that Valerie sent you for literature cut off dates were off by about 5 months.
>> They should be 31 Jan and 15 Oct 2020.
>> Anna

9. WGI - Data Distribution Centre
Reproducibility and transparency of assessment
Curation of data reporduced in report – Figures and Tables
Multiple sources (model, reanalysis, observations, paleo information)
Multiple scales (projections, predictions, global, high resolution, regional)
Regional Climate Atlas
scale-, region-, user-specific information
online navigation and tailoring of information extraction
WGII linkages
Expert Meeting in 2018 (tentatively May)
Oversight (TGICA, AR6 Bureau and authors) and linkages:
CMIP Panel / WGCM Infrastructure Panel
Decadal Climate Prediction Project
CORDEX
Observations, reanalysis and other data sources
Data access
Mentionner :
Renforcement de la prise en compte des villes
Rapport sur les méthodologies d’inventaires des émissions (2019)

10. Broader AR6 - Data Distribution Centre
Integration of IAM database into DDC
Curation for Special Reports (underway)
AR6 oversight
TGICA
Cross-WG coordination
AR5 DDC data delivery – understanding AR6 needs
users (stakeholders, research community)
regional uptake, region-specific needs
data preferences/priorities
Mentionner :
Renforcement de la prise en compte des villes
Rapport sur les méthodologies d’inventaires des émissions (2019)

11. Schedule Sept 2018 April 2021 October 2021 Fall 2019 April 2022
Global warming of
1.5 oC
Oceans
and cryosphere
The Physical Science Basis
Climate Change Impacts, Adaptation and Vulnerability
The Synthesis Report
Facilitative dialogue
UNFCCC
Land
Mitigation of Climate Change
Global stocktake 2023
UNFCCC
Mentionner :
Renforcement de la prise en compte des villes
Rapport sur les méthodologies d’inventaires des émissions (2019)
Fall 2019
July 2021