"Recognizing the problem of potential global climate change, the World Meteorological Organization (WMO) and the United Nations Environment Programme (UNEP) established the Intergovernmental Panel on Climate Change (IPCC) in 1988. It is open to all members of the UN and WMO.

The role of the IPCC is to assess on a comprehensive, objective, open and transparent basis the scientific, technical and socio-economic information relevant to understanding the scientific basis of risk of human-induced climate change, its potential impacts and options for adaptation and mitigation. The IPCC does not carry out research nor does it monitor climate related data or other relevant parameters. It bases its assessment mainly on peer reviewed and published scientific/technical literature. Its role, organisation, participation and general procedures are laid down in the 'Principles Governing IPCC Work.'

The WGI contribution to the IPCC Fourth Assessment Report describes progress in understanding of the human and natural drivers of climate change1, observed climate change, climate processes and attribution, and estimates of projected future climate change. It builds upon past IPCC assessments and incorporates new findings from the past six years of research. Scientific progress since the Third Assessment Report (TAR) is based upon large amounts of new and more comprehensive data, more sophisticated analyses of data, improvements in understanding of processes and their simulation in models, and more extensive exploration of uncertainty ranges." (Intergovernmental Panel on Climate Change, 2007)

Below are some excerpts from the IPCC WGI 4th Assessment Report (IPCC, 2007) which leaves little doubt that the present climate is experiencing an unprecedented global warming rate which is primarily due to human (anthropogenic) activities:

Climate change is caused by mechanisms that force change to occur over millions of years (tectonic time scales), over tens to hundreds of thousands of years (orbital scales), and over shorter time scales (decades to centuries). It is this shorter time scale that humans must be most concerned with because these are the time scales in which we live.

Scott A. Mandia
Professor - Physical Sciences
T-202 Smithtown Sciences Bldg.
533 College Rd.
Selden, NY 11784
(631) 451-4104