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  • Glossary item | Last updated: 04 Jan 2021

Reservoir

A component of the climate system, other than the atmosphere, which has the capacity to store, accumulate or release a substance of concern, for example, carbon, a greenhouse gas or a precursor. Oceans, soils and forests are examples of reservoirs of carbon. Pool is an equivalent term (note that the definition of pool often includes the atmosphere). The absolute quantity of the substance of concern held within a reservoir at a specified time is called the stock.

IPCC, 2007, Intergovernmental Panel on Climate Change - Fourth Assessment Report: (AR4) 'Climate Change 2007'

Source category: International Organisation