ACCENT
Atmospheric Composition Change: a European Network
This is a collaborative research program based in Europe focussing on changes in the make up of the Atmosphere. It is based primarily in the University of Urbino.
Definition based on (revised from) IPCC AR4.
All IPCC definitions taken from Climate Change 2007: The Physical Science Basis. Working Group I Contribution to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Annex I, Glossary, pp. 941-954. Cambridge University Press.