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Information about meteorological and climatological data concerning how and when they were measured, their quality, known problems and other characteristics.
[IPCC Fourth Assessment, Working Group I, Appendix I Glossary, p. 949]
An anthropogenic intervention to reduce the anthropogenic forcing of the climate system; it includes strategies to reduce greenhouse gas sources and emissions and enhancing greenhouse gas sinks.
[IPCC Fourth Assessment, Working Group II, Appendix I Glossary, p. 878]