The Working Group I contribution to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC) provides a comprehensive assessment of the physical science basis of climate change. It considers in situ and remote observations; palaeoclimate information; understanding of climate drivers and physical, chemical, and biological processes and feedbacks; global and regional climate modelling; advances in methods of analyses; and insights from climate services. It assesses the current state of the climate; human influence on climate in all regions; future climate change including sea level rise; global warming effects including extremes; climate information for risk assessment and regional adaptation; limiting climate change by reaching net zero carbon dioxide emissions and reducing other greenhouse gas emissions; and benefits for air quality. The report serves policymakers, decision-makers, stakeholders, and all interested parties with the latest policy-relevant information on climate change.
Foreword
Preface
Dedication
Summary for Policymakers
Technical Summary
1. Framing, Context, and Methods
2. Changing State of the Climate System
3. Human Influence on the Climate System
4. Future Global Climate: Scenario-based Projections and Near-term Information
5. Global Carbon and Other Biogeochemical Cycles and Feedbacks
6. Short-lived Climate Forcers
7. The Earth's Energy Budget, Climate Feedbacks and Climate Sensitivity
8. Water Cycle Changes
9. Ocean, Cryosphere and Sea Level Change
10. Linking Global to Regional Climate Change
11. Weather and Climate Extreme Events in a Changing Climate
12. Climate Change Information for Regional Impact and for Risk Assessment
Atlas
Annex I. Observational Products
Annex II. Models
Annex III. Tables of Historical and Projected Well-mixed Greenhouse Gas Mixing Ratios and Effective Radiative Forcing of All Climate Forcers
Annex IV. Modes of Variability
Annex V. Monsoons
Annex VI. Climatic Impact-driver and Extreme Indices
Annex VII. Glossary
Annex VIII. Acronyms
Annex IX. Contributors to the IPCC WGI Sixth Assessment Report
Annex X. Expert Reviewers of the IPCC Sixth Assessment Report
Index