IPCC

Key Facts for Future Climate – COP21

COP21 – Paris Climate Conference 30th November to 11th December 2015 Key facts for future climate    What is COP21? And who is involved? COP21 has involved two weeks of talks between government officials from around the world. The goals are: To agree legally-binding, global targets on cutting carbon emissions to keep global warming below 2°C. To therefore reduce the impacts of man-made global warming beyond 2020. To discuss ways of helping developing nations to continue their development in a sustainable way. There have been over 50,000 participants from governments, the United Nations (UN), and Non-Governmental Organisations (NGOs). 195 countries were represented, and world leaders were present for...

In brief: the IPCC Climate Change 2014 Synthesis Report

Ignorance can no longer be used as an excuse for no action Michel Jarraud – World Meteorological Organization    What is the Synthesis Report? The newly published IPCC Synthesis Report, released on 2nd November, draws together the key findings of the three Working Groups of the IPCC (The Physical Science Basis; Impacts, Adaptation, and Vulnerability; Mitigation of Climate Change – available here) as well as two Special Reports. It forms the final, and possibly most important, instalment of the IPCC’s Fifth Assessment Report (AR5). For previous Climatica reports on the IPCC’s recent findings, click on these links: IPCC: Future climate phenomenon; IPCC: Long-term climate projections;...

Mitigating climate change – The IPCC WGIII report

What is the IPCC WG III? On 14th April 2014 the IPCC Working Group III (WG III) published their latest report (link) on climate change mitigation. This is the third of three reports from the IPCC, and follows on from their previous publications: WG I ‘The Physical Science Basis’, published in September 2013; and WG II ‘Impacts, Adaptation and Vulnerability’, published in March 2014.  Their latest report draws together over four years of work by over 230 scientists, and presents our options for reducing greenhouse gas (GHG) emissions and developing a more sustainable future.   The report analyses the outcomes of 1200 published scientific studies....

IPCC special: Future climate phenomena and regional climate change

The latest report of Working Group I of the Intergovernmental Panel on Climate Change (IPCC) combines new and better observations with improved models to provide a clearer and more definite picture of humanity’s influence on the climate system, and the paths we can choose for the future. The atmosphere continues to warm, with the last three decades each being warmer than the one before, and all three being warmer than any other decade since reliable observations began in the 1850s. Warming is seen almost everywhere on the Earth’s surface, and many observed changes are unprecedented on scales of decades to millennia. We also now have...

IPCC special: Long-term climate projections

Chapter 12 of the 5th Assessment Report of IPCC (Intergovernmental Panel on Climate Change) deals with future projections of climate change in the long-term. Long-term in this case means beyond the middle of the 21st century when the projections start to depend more strongly on the pathway or scenario of emissions of greenhouse gases, principally CO2. We rely extensively on computer models of the climate system for this as, obviously, there are no observations of the future. While computer models are not completely accurate in their ability to project future climate change, it is possible to use our understanding of the climate system to assess uncertainties...