AR6 Climate Change 2021: The Physical Science Basis

On 9 August 2021 the Working Group I contribution to the Sixth Assessment Report of the IPCC (the Intergovernmental Panel on Climate Change) became available. It addresses the most up-to-date physical understanding of the climate system and climate change, bringing together the latest advances in climate science, and combining multiple lines of evidence from paleoclimate, observations, process understanding, and global and regional climate simulations.

In addition to the full report (more than 1000 pages), a Summary for Policymakers (SPM) is also available (39 pages), providing high-level summary of the understanding of the current state of the climate, including how it is changing and the role of human influence, and the state of knowledge about possible climate futures, climate information relevant to regions and sectors, and limiting human-induced climate change.

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