This report distils and interprets information relevant to Aotearoa New Zealand from the Working Group 1 (WG1) contribution to the Intergovernmental Panel on Climate Change (IPCC) Sixth Assessment Report (AR6) titled ‘The Physical Science Basis’, published in August 2021.

Key findings:

  • The mean global warming from 1850-1900 up to 2011-2020 is 1.09°C.
  • The world is getting closer to crossing the Paris Agreement thresholds of 1.5 and 2°C.
  • Evidence of observed changes in extreme weather events and their attribution to human influence has strengthened since the IPCC’s Fifth Assessment Report (AR5).
  • The evidence for warming in New Zealand continues to build. New Zealand experienced its warmest year on record in 2021, surpassing the previous record set in 2016. Seven of the past nine years have been among New Zealand’s warmest on record.
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