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Gross primary production carbon cycle

Many estimates of total terrestrial net primary production are available, ranging between 45.5 Pg C/yr (Lieth, 1972) and 78 Pg/yr (Bazilevich et al., 1970). Ajtay ef oZ. (1979) have revised the various estimates and methods involved, they also reassess the classifications of ecosystem types and the extent of the ecosystem surface area using new data and arriving at a total NPP of 60 Pg C/yr. Gross primary production is estimated to be twice net primary production, i.e., 120 Pg C/yr. This implies that about 60 Pg C/yr are returned to the atmosphere during the respiratory phase of photosynthesis. It is well known that carbon dioxide uptake by plants follows daily cycles most plants take up CO2... [Pg.299]

See other pages where Gross primary production carbon cycle is mentioned: [Pg.655]    [Pg.235]    [Pg.179]    [Pg.422]    [Pg.2107]    [Pg.5]    [Pg.2265]    [Pg.2904]    [Pg.500]   


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Carbon cycle

Carbon cycle, production

Carbon cycling

Carbon primary productivity

Carbon product

Carbonates production

Gross

Gross primary production

Gross primary productivity

Primary carbon

Primary carbonization

Primary cycle

Primary productivity

Primary products

Production cycle

Production primary

Production/productivity gross

Production/productivity primary

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