08 Oct 2013

Organization: Geneva Environment Network

Climate Change 2013: The Physical Science Basis

IPCC Fifth Assessment Report (AR5) will provide a clear view of the current state of scienti c knowledge relevant to climate change. It comprises three Working Group (WG) reports and a Synthesis Report (SYR).

The Working Group I contribution to AR5 – Climate Change 2013: The Physical Science Basis, released in September 2013, provides a comprehensive assessment of the physical science basis of climate change in 14 chapters, supported by a number of annexes and supplementary material. According to the report human influence on the climate system is clear. This is evident in most regions of the globe. Warming in the climate system is unequivocal and since 1950 many changes have been observed throughout the climate system that are unprecedented over decades to millennia. Each of the last three decades has been successively warmer at the Earth’s surface than any preceding decade since 1850.

The Geneva Environment Network Secretariat in cooperation with the IPCC Secretariat organized an event providing an overview of the WGI contribution to the AR5 report, taking place at the International Environment
House on Tuesday 8 October, with

  • Renate CHRIST, Secretary, IPCC
  • Gian-Kasper PLATTNER, Drafting Author, Summary for Policymakers (Director of Science, Technical Support Unit, Working Group I) (see ppt presentation below)
  • José ROMERO, Switzerland

Following questions and remarks from France, Iran, Italy, Sudan, UNITAR, the UN-Quaker Office and Helvetas speakers provided additional information on the scientific findings, the political willingness of the international community, some implications for the governments, geographical repartition of scientists involved, and outreach activities.

More information and documents

For more information on the WGI contribution, please visit the IPCC website www.ipcc.ch or or the Working Group I website for AR5 www.climatechange2013.org

Gian-Kasper Plattner bio is available online.