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Executive Summary
1: Our Globally Changing Climate
2: Physical Drivers of Climate Change
3: Detection and Attribution of Climate Change
4: Climate Models, Scenarios, and Projections
5: Large-Scale Circulation and Climate Variability
6: Temperature Changes in the United States
7: Precipitation Change in the United States
8: Droughts, Floods, and Wildfire
9: Extreme Storms
10: Changes in Land Cover and Terrestrial Biogeochemistry
11: Arctic Changes and their Effects on Alaska and the Rest of the United States
12: Sea Level Rise
13: Ocean Acidification and Other Ocean Changes
14: Perspectives on Climate Change Mitigation
15: Potential Surprises: Compound Extremes and Tipping Elements
Appendix A: Observational Datasets Used in Climate Studies
Appendix B: Model Weighting Strategy
Appendix C: Detection and Attribution Methodologies Overview
Appendix D: Acronyms and Units
Appendix E: Glossary
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