Fraction of global primary production that is oceanic

Range ~1/2 of global primary production
Organism Biosphere
Reference del Giorgio PA, Duarte CM. Respiration in the open ocean. Nature. 2002 Nov 28 420(6914):379-84 DOI: 10.1038/nature01165 p.379 left column top paragraphPubMed ID12459775
Primary Source [1] Field CB, Behrenfeld MJ, Randerson JT, Falkowski P. Primary production of the biosphere: integrating terrestrial and oceanic components. Science. 1998 Jul 10 281(5374):237-40PubMed ID9657713
Method Primary source abstract: "Integrating conceptually similar models of the growth of marine and terrestrial primary producers yielded an estimated global net primary production (NPP) of 104.9 petagrams of carbon per year, with roughly equal contributions from land and oceans." Petagram=10^15 grams
Comments P.379 left column top paragraph: "Oceanic primary production (P) represents about half of the planet's primary production (primary source), ranging from 35 to 65 gigatonnes of carbon per year (Gt C/yr) (primary source 1, BNID 115373) with open ocean production accounting for over 80% of the total (BNID 115375). Only a small fraction of this organic matter is buried in the ocean's sediments, the bulk of the organic matter produced being instead remineralized through respiration (ref 3)."(Gt C/yr)=gigatonnes of carbon per year=10^9 tonnes of carbon per year
Entered by Uri M
ID 115374