The Fifth Assessment Report (AR5) is now underway. It will consist of three Working Group (WG) Reports and a Synthesis Report,
to be completed in 2013/2014:
WG I: The Physical Science Basis - mid September 2013
WG II: Impacts, Adaptation and Vulnerability - mid March 2014
WG III: Mitigation of Climate Change - early April 2014
AR5 Synthesis Report (SYR) - October 2014
The AR5 will provide an update of knowledge on the scientific, technical and socio-economic aspects of climate change.
Information about the outline and other content to be addressed can be found in the
AR5 reference document and
SYR Scoping document.
More than 800 authors, selected from around
3000 nominations, are involved in writing the reports. First Lead Authors meetings have been held. For the schedule of AR5
related meetings, review periods, and other important dates, please refer to the
A number of workshops and expert meetings, in support of the assessment process, have been held.
The three Working Groups full reports and the Synthesis Report, the final part of the AR4,
are available online (see here below). Hardcopies of the Summaries for Policymakers + Technical
Summaries are available for free in the 6 UN official languages upon request to the IPCC Secretariat.
Hardcopies of the full reports can be purchased from Cambridge University Press.
A limited number of free copies are available for academic institutions from developing countries and
countries with economies in transition upon request to the Secretariat.
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