IPCC – Climate Change 2021 – The Physical Science Basis Summary for Policymakers

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The assessment covers scientific literature accepted for publication by 31 January 2021.

The report builds upon the 2013 Working Group I contribution to the IPCC’s Fifth Assessment Report (AR5) and the 2018-2019 IPCC Special Reports 2 of the AR6 cycle.

The scientific basis for each key finding is found in chapter sections of the main Report, and in the integrated synthesis presented in the Technical Summary (hereafter TS)

This SPM provides a high-level summary of the understanding of the current state of the climate, including how it is changing and the role of human influence.