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    • About This Report
    • Guide to the Report
    • Report Credits
    • Companion Podcast
    • Additional Resources
    • About this Report
    • Guide to this Report
    • OVERVIEW
    • Physical Science
    • 2. Climate Trends
    • 3. Earth Systems Processes
    • National Topics
    • 4. Water
    • 5. Energy
    • 6. Land
    • 7. Forests
    • 8. Ecosystems
    • 9. Coasts
    • 10. Oceans
    • 11. Agriculture
    • 12. Built Environment
    • 13. Transportation
    • 14. Air Quality
    • 15. Human Health
    • 16. Indigenous Peoples
    • 17. International
    • 18. Complex Systems
    • 19. Economics
    • 20. Social Systems and Justice
    • Regions
    • 21. Northeast
    • 22. Southeast
    • 23. US Caribbean
    • 24. Midwest
    • 25. Northern Great Plains
    • 26. Southern Great Plains
    • 27. Northwest
    • 28. Southwest
    • 29. Alaska
    • 30. Hawai'i and US-Affiliated Pacific Islands
    • Responses
    • 31. Adaptation
    • 32. Mitigation
    • Focus On
    • F1. Compound Events
    • F2. Western Wildfires
    • F3. COVID-19 and Climate Change
    • F4. Risks to Supply Chains
    • F5. Blue Carbon
    • Appendices
    • A1. Process
    • A2. Information Quality
    • A3. Scenarios and Datasets
    • A4. Indicators
    • A5. Glossary

    • All Figures
    • All Key Messages
    • View All Report Downloads
  • Art × Climate
  • NCA Atlas
  • EN ESPAÑOL
This website is being hosted by Climate.us. It is a clone of the Fifth National Climate Assessment, as it was originally published by the U.S. Global Change Research Program at the URL nca2023.globalchange.gov. Its content has not been altered from the original in any way; however, this is not an official U.S. government website.
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La Quinta Evaluación Nacional del Clima
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Descargas de informesDescripción generalPDF file icon
Descargas de capítulosTexto preliminarPDF file icon
1: Descripción general: Comprender riesgos, efectos y respuestasPDF file icon
2: Tendencias climáticasPDF file icon
3: Procesos de los sistemas de la TierraPDF file icon
4: El aguaPDF file icon
5: Abastecimiento, suministro y demanda de energíaPDF file icon
6: Cambios en la cobertura terrestre y en el uso de la tierraPDF file icon
7: BosquesPDF file icon
8: Ecosistemas, servicios ecosistémicos y biodiversidadPDF file icon
9: Efectos costerosPDF file icon
10: Ecosistemas oceánicos y recursos marinosPDF file icon
11: Agricultura, sistemas alimentarios y comunidades ruralesPDF file icon
12: Entorno construido, sistemas urbanos y ciudadesPDF file icon
13: TransportePDF file icon
14: Calidad del airePDF file icon
15: Salud humanaPDF file icon
16: Tribus y pueblos indígenasPDF file icon
17: Efectos del clima en los intereses internacionales de los Estados UnidosPDF file icon
18: Interacciones sectoriales, factores de estrés múltiples y sistemas complejosPDF file icon
19: La economíaPDF file icon
20: Sistemas sociales y justiciaPDF file icon
21: NorestePDF file icon
22: SurestePDF file icon
23: Caribe estadounidensePDF file icon
24: Medio OestePDF file icon
25: Grandes Llanuras del NortePDF file icon
26: Grandes Llanuras del SurPDF file icon
27: NoroestePDF file icon
28: SuroestePDF file icon
29: AlaskaPDF file icon
30: Hawái y las Islas del Pacífico Afiliadas a los Estados UnidosPDF file icon
31: AdaptaciónPDF file icon
32: MitigaciónPDF file icon
Enfoque en
F1: Los eventos compuestosPDF file icon
F2: Los incendios forestales del OccidentePDF file icon
F3: El COVID-19 y el cambio climáticoPDF file icon
F4: Los riesgos de las cadenas de suministroPDF file icon
F5: El carbono azulPDF file icon
Anexos
A1: Proceso de desarrollo de la evaluaciónPDF file icon
A2: Calidad de la informaciónPDF file icon
A3: Escenarios y bases de datosPDF file icon
A4: IndicadoresPDF file icon

Likelihood

Virtually CertainVery LikelyLikelyAs Likely as NotUnlikelyVery UnikelyExceptionally Unlikely
99%–100%90%–100%66%–100%33%–66%0%–33%0%–10%0%–1%

Confidence Level

Very HighHighMediumLow
  • Strong evidence (established theory, multiple sources, well-documented and accepted methods, etc.)
  • High consensus
  • Moderate evidence (several sources, some consistency, methods vary and/or documentation limited, etc.)
  • Medium consensus
  • Suggestive evidence (a few sources, limited consistency, methods emerging, etc.)
  • Competing schools of thought
  • Inconclusive evidence (limited sources, extrapolations, inconsistent findings, poor documentation and/or methods not tested, etc.)
  • Disagreement or lack of opinions among experts

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