Reservoirs or locations that sequester or store a greater amount of carbon dioxide than they release. Major carbon sinks include forests and oceans.
"Glossary and Abbreviations", Barnsley, Ingrid, United Nations University Institute of Advanced Studies (UNU-IAS) 2009, "UNUIAS Guide, Reducing Emissions from Deforestation and Degradation in Developing Countries (REDD): A Guide for Indigenous Peoples." January 2009 http://www.ias.unu.edu/resource_centre/2009_REDD_Guide.pdf
Natural or man-made systems that absorb carbon dioxide from the atmosphere and store them.
Climate Change & Forestry Glossary, UNFCCC, Bali, 2007.