IPCC - Intergovernmental Panel on Climate Change
A total of 209 Lead Authors and 50 Review Editors from 39 countries and more than 600 Contributing Authors from 32 countries contributed to the preparation of Working Group I's Fifth Assessment Report "Climate Change 2013: The physical Science Basis". For more on how the Working Group I report was prepared click here
This report confirms with even more certainty than in the past, that it is extremely likely that the changes in our climate system for the past half a century are due to human influence. It should serve as yet another wake up call that our activities today will have a profound impact on society not only for us but for many generations to come. Multiple lines of evidence confirm that the extra heat being trapped by greenhouse gases is warming the Earth atmosphere,surface to record levels, heating and acidifying the oceans, raising sea levels, and melting ice caps and glaciers.
The Final Draft of the Working Group I contribution to the IPCC Fifth Assessment Report will be available here on 30 September.