A panel of experts established in 1988 by the United Nations Environment Programme and the World Meteorological Organization with a mandate to assess knowledge of the climate system and climatic change; the environmental, economic, and social impacts; and possible response strategies. Its activities are covered by three principal Working Groups, which may be broadly summarized as: I—scientific assessment of processes operating to cause climate change and modelling of these processes; II—assessment of climate-change impacts; III—determination of possible response strategies. In addition to holding major scientific conferences, the IPCC issues a number of publications (Special Reports and Technical Papers) dealing with specific aspects of its work, but the most significant are its Assessment Reports. The First was issued in 1990 and provided the basis for negotiations on the Framework Convention on Climate Change. The Second Assessment Report was issued in 1995; the Third in 2001; and the Fourth in 2007. The level of scientific expertise and credibility exhibited by the IPCC in its various activities is, in itself, a major achievement.
Subjects: Environmental Science.