Since its creation, the Intergovernmental Panel on Climate Change (IPCC), the UN body for assessing the science related to climate change, has produced five comprehensive Assessment Reports and several Special Reports on specific topics. The IPCC has also produced Methodology Reports, which provide practical guidelines on the preparation of greenhouse gas inventories for the inventory reporting requirements of Parties to the United Nations Framework Convention on Climate Change (UNFCCC).

At the end of 2007 the IPCC together with Albert Arnold (Al) Gore Jr. were awarded the Nobel Peace Prize “for their efforts to build up and disseminate greater knowledge about man-made climate change, and to lay the foundations for the measures that are needed to counteract such change”.

The following short video explains what producing reports by the IPCC means and how they are produced:


The IPCC is currently in its Sixth Assessment cycle and will be delivering one or more policy-relevant reports every year from 2018 to 2022, except for 2020.

The first of these reports, the IPCC Special Report on Global Warming of 1.5ºC, will be delivered in October 2018 in time for the Talanoa dialogue as per the request of COP21. In 2019, the IPCC will update its methodologies in order for countries to report their emissions in line with the Paris Agreement on the basis of the best science.

Two other special reports on land and on oceans will also be delivered in 2019. The Special Report on the Ocean and Cryosphere in a Changing Climate would assess new knowledge related to sea-level risks and options for increasing coastal resilience in both human and natural systems. It would look at water from the mountain top to the sea. During the Sixth Assessment Cycle, the IPCC will also assess many topics related to life on land including desertification, sustainable land management and food security in a Special Report on Climate Change and Land.

The full Sixth Assessment Report, including three working group contributions on different aspects of climate change ready in 2021, will be completed with a Synthesis Report in 2022, in time for the first global stocktake under the Paris Agreement the following year.

Leaflet in UN Languages: The Sixth Assessment cycle (English – Arabic – Chinese – French – Russian – Spanish).


The last, Fifth Assessment Report (AR5), was finalized between 2013 and 2014, and provided a key input to the Paris Agreement. The key findings of the Synthesis Report are:

  • Human influence on the climate system is clear;
  • The more we disrupt our climate, the more we risk severe, pervasive and irreversible impacts; and
  • We have the means to limit climate change and build a more prosperous, sustainable future.

It is the most comprehensive assessment of scientific knowledge on climate change since 2007 when the Fourth Assessment Report (AR4) was released. Over 830 scientists from over 80 countries were selected to form the author teams producing the report. They in turn drew on the work of over 1,000 contributing authors and over 1,000 expert reviewers. AR5 assessed over 30,000 scientific papers. It was released in four parts between September 2013 and November 2014. AR5 is made up of the full reports prepared by the Working Groups (I, II and III) and their Summaries for Policymakers as well as the Synthesis Report.

The Physical Science Basis 2013

Impacts, Adaptation, and Vulnerability


The following infographics explain how the IPCC contributes to climate science and policimaking and how its reports are prepared:


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