Climate Change 2013: the physical science basis - summary for policymakers

Climate Change 2013: the physical science basis - summary for policymakers

Read text of the Summary for Policymakers portion of the first volume of the IPCC's Fifth Assessment Report (AR5) "Climate Change 2013: The Physical Science Basis". The Working Group I contribution to the IPCC's Fifth Assessment Report (AR5) considers new evidence of climate change based on many independent scientific analyses from observations of the climate system, paleoclimate archives, theoretical studies of climate processes and simulations using climate models. It builds upon the Working Group I contribution to the IPCC’s Fourth Assessment Report (AR4), and incorporates subsequent new findings of research. As a component of the fifth assessment cycle, the IPCC Special Report on Managing the Risks of Extreme Events to Advance Climate Change Adaptation (SREX) is an important basis for information on changing weather and climate extremes.
 
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