The Physical Science Basis
The Working Group I contribution provides a comprehensive assessment of the physical science basis of climate change. The report includes a detailed assessment
of climate change observations throughout the climate system; dedicated chapters on sea level change, biogeochemical cycles, clouds and aerosols, and regional climate
phenomena; extensive information from models, including near-term and long-term climate projections; and a new comprehensive atlas of global and regional climate
projections for 35 regions of the world.
Summary for Policymakers
(ar I
en I
es I
fr I
ru I
zh)
Working Group I Report website
Quick link to report PDFs
Impacts, Adaptation and Vulnerability
The Working Group II contribution considers the vulnerability and exposure of human and natural
systems, the observed impacts and future risks of climate change, and the potential for and limits to adaptation. The chapters
of the report assess risks and opportunities for societies, economies, and ecosystems around the world.
Summary for Policymakers
(ar I
en I
es I
fr I
ru I
zh)
Working Group II Report website
Quick link to report PDFs
Mitigation of Climate Change
The Working Group III contribution assesses the options for mitigating climate change and their
underlying technological, economic and institutional requirements. It transparently lays out risks, uncertainty and ethical
foundations of climate change mitigation policies on the global, national and sub-national level, investigates mitigation measures for
all major sectors and assesses investment and finance issues.
Summary for Policymakers
(en)
Working Group III Report website
Quick link to report PDFs
