Federal Register #2026-17289

Public Comment Requested on Proposed Amendment to Fifth National Climate Assessment (NCA5)

This opportunity is a request for public comment on a proposed amendment to the Fifth National Climate Assessment (NCA5) by the Office of Science and Technology Policy (OSTP) for the U.S. Global Change Research Program (USGCRP). - Government Buyer: - Office of Science and Technology Policy (OSTP) - U.S. Global Change Research Program (USGCRP) - No OEMs or vendors are involved; this is not a procurement or award notice. - No products or services are requested; no part numbers or quantities provided. - Unique Requirements: - Solicitation of public input on the scientific basis for the amendment - Clarification of how high-emissions pathways (RCP8.5, SSP5-8.5, SRES A2, or analogous scenarios) should be interpreted and used in Federal planning - Input requested on labeling, communication methods, and implications for Federal planning and analysis - The amendment emphasizes that results dependent on high-emissions pathways should not be presented as expected or baseline Federal planning futures unless independently reproduced under plausible scenarios.

Description

OSTP, on behalf of the U.S. Global Change Research Program (USGCRP), announces the availability of a proposed amendment and clarification to the Fifth National Climate Assessment (NCA5) for public comment. The proposed amendment addresses the interpretation and Federal use of NCA5 results that depend materially on RCP8.5, SSP5-8.5, SRES A2, or analogous high-emissions pathways. The amendment clarifies that results dependent on these pathways should not be presented as expected or baseline Federal planning futures unless independently reproduced under plausible scenarios. Public comments are invited on the scientific basis, labeling methods, and implications for Federal planning and communications.

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