Université Paris-Saclay

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91190 Saint Aubin


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The IPCC Working Group I (WG I) aims at assessing the physical scientific basis of the climate system and climate change. Its main topics include: changes in greenhouse gases and aerosols in the atmosphere; observed changes in air, land and ocean temperatures, rainfall, glaciers and ice sheets, oceans and sea level; historical and paleoclimatic perspective on climate change; biogeochemistry, carbon cycle, gases and aerosols; satellite data and other data; climate models; climate projections, causes and attribution of climate change.









Women-ACS side event during COP22 in Marrakech, Morocco


Technical Support Unit of WGI and Association Marocaine des Sciences Regionales organized the side event "Women Advancing Climate and Climate Change Sciences" on November 14. Women-ACS is a new international initiative that aims to increase women's participation and accomplishments in the domain of climate and climate change sciences.














WGI co-organizes side event at COP22, Marrakech, Morocco, on urgent questions in climate research


On the opening day of COP22, IPCC Working Group I, the International Council for Science in partnership with the Scientific Committee on Antarctic Research (SCAR), the Inter-American Institute for Global Change Research (IAI) and the World Climate Research Programme (WCRP) convened a side event on key pressing issues in fundamental climate research following the Paris Agreement. Read more.



Speakers at the COP22 side event


Photo by IISD












44th Session of IPCC, Bangkok, Thailand


The 44 Session of the IPCC was held in the United Nations Convention Centre (UNCC) in Bangok, Thailand from 17 to 20 October 2016. The Intergovernmental Panel on Climate Change (IPCC) has agreed the outlines of two new reports that will help governments implement the Paris Climate Change Agreement. Download the press release



Some of the WGI Bureau and TSU members in Bangkok













SR1.5 Scoping meeting, Geneva, Switzerland


A scoping meeting for the Special Report on 1.5°C was held on 15-18 August 2016 in Geneva Switzerland. The meeting resulted in a draft Scoping Paper describing the objectives and an annotated outline of the Special Report as well as the process and timeline for its preparation to be considered by the 44th Session of the IPCC in October 2016. All the details on the scoping meeting of the Special Report on the impacts of global warming of 1.5°C above pre-industrial levels and related global greenhouse gas emission pathways are available here and in the Scoping meeting report



SR1.5 Scoping Meeting particiapnts












43rd Session of IPCC, Nairobi, Kenya


The 43rd Session of the IPCC was held in the United Nations Office at Nairobi (UNON) in Gigiri from 11 to 13 April 2016. The Intergovernmental Panel on Climate Change (IPCC) has decided the strategy and timeline for its next series of reports, the Sixth Assessment Report (AR6), and the special reports that will be prepared in the next few years. Download the press release



Some of the WGI Bureau and TSU members


Photo by IISD/Kiara Worth












WGI Technical Support Unit implemented


WGI is glad to report on the implementation of our Technical Support Unit, acknowledging support from the French governement through the Ministery of Environment, Energy and Sea; the Ministery of Foreign Affairs; and the Ministery of Research and Education and thank the French focal point for his support to prepare and implement our TSU. The TSU is hosted at the Paris Saclay University, in close partnership with the Institut Pierre Simon Laplace research center. TSU information here.









Election of WGI Co-Chairs and Bureau


At the 42nd Session of the IPCC in Dubrovnik, Croatia, 5-8 October 2015, the Fifth Assessment Report period officially came to an end and a new bureau was elected for the Sixth Assessment Report.



The new Working Group I Co-Chairs



Panmao Zhai (China) and Valérie Masson-Delmotte (France)



The Co-Chairs will be supported by the newly elected Working Group I Vice Chairs:


Edvin Aldrian (Indonesia)

Fatima Driouech (Morocco)

Gregory Flato (Canada)

Jan Fuglestvedt (Norway)

Muhammad Tariq (Pakistan)

Carolina Vera (Argentina)

Noureddine Yassaa (Algeria)



The outgoing Co-Chairs of WGI, Thomas Stocker and Qin Dahe, as well as the WGI TSU for AR5, wish the new Co-Chairs and the WGI Bureau all the best and plenty of success for their important contributions to the Sixth Assessment cycle.