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Graph showing half hourly Net Ecosystem Exchange (NEE) data from 1999 to 2011. Points below the zero line indicate that the forest is acting as a net sink for carbon dioxide (summer daytime). Points above the zero line indicate a net loss of carbon dioxide from the forest to the atmosphere (all winter and summer nights). At the annual scale at this site the overall balance is in favour of being a net sink.

Reference:

Graph showing half hourly Net Ecosystem Exchange (NEE) data from 1999 to 2011. Points below the zero line indicate that the forest is acting as a net sink for carbon dioxide (summer daytime). Points above the zero line indicate a net loss of carbon dioxide from the forest to the atmosphere (all winter and summer nights). At the annual scale at this site the overall balance is in favour of being a net sink.


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Credit line: Forestry Commission

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