The Fifth National Climate Assessment is the US Government’s preeminent report on climate change impacts, risks, and responses. It is a congressionally mandated interagency effort that provides the scientific foundation to support informed decision-making across the United States.

The Fifth National Climate Assessment is the US Government’s preeminent report on climate change impacts, risks, and responses. It is a congressionally mandated interagency effort that provides the scientific foundation to support informed decision-making across the United States.

The FY2023 edition of USGCRP’s annual report to Congress presents highlights of the Program’s recent accomplishments and outlines future priorities as the Program begins to implement its 2022–2031 Strategic Plan. It also presents a summary of agency expenditures under USGCRP’s budget crosscut, as required by the Global Change Research Act.

The FY2022 edition of USGCRP's annual report to Congress, Our Changing Planet , responds to the Global Change Research Act mandate to provide an overview of the Program's progress in delivering on its strategic goals as well as a summary of agency expenditures under USGCRP's budget crosscut.

The FY2021 edition of USGCRP's annual report to Congress, Our Changing Planet , responds to the Global Change Research Act mandate to provide an overview of the Program's progress in delivering on its strategic goals as well as a summary of agency expenditures under USGCRP's budget crosscut.

The FY2020 edition of USGCRP's annual report to Congress, Our Changing Planet , responds to the Global Change Research Act mandate to provide an overview of the Program's progress in delivering on its strategic goals as well as a summary of agency expenditures under USGCRP's budget crosscut.

The FY2018–19 edition of USGCRP's annual report to Congress, Our Changing Planet , responds to the Global Change Research Act mandate to provide an overview of the Program‚'s progress in delivering on its strategic goals as well as a summary of agency expenditures under USGCRP's budget crosscut.

Volumen II de la Cuarta Evaluación Nacional del Clima (NCA4, por sus siglas en inglés) se centra en los elementos del bienestar humano, sociales, y ambientales del cambio climático y la variabilidad para las 10 regiones y los 18 tópicos nacionales, con atención especial a los riesgos observados y proyectados, la consideración de la reducción de riesgos, y las consecuencias de distintas trayectorias de mitigación. Donde era posible, el Volumen II de la NCA4 presenta ejemplos de acciones en progreso en comunidades dentro de los Estados Unidos para reducir los riesgos asociados con el cambio...

The Report-in-Brief includes plain-language highlights and the technical executive summary. The Second State of the Carbon Cycle Report (SOCCR2) provides a current state-of-the-science assessment of the carbon cycle in North America and its connection to climate and society. Information from the report is relevant to climate and carbon research as well as to management practices in North America and around the world.

The Report-in-Brief consists of the NCA4 Vol. II Front Matter, Overview, and Executive Summaries of each chapter. Volume II of the Fourth National Climate Assessment focuses on the human welfare, societal, and environmental elements of climate change and variability for 10 regions and 18 national topics, with particular attention paid to observed and projected risks, impacts, consideration of risk reduction, and implications under different mitigation pathways. Where possible, NCA4 Vol. II provides examples of actions underway in communities across the United States to reduce the risks...