~685 - 700 Gt C
||del Giorgio PA, Duarte CM. Respiration in the open ocean. Nature. 2002 Nov 28 420(6914):379-84 DOI: 10.1038/nature01165 p.380 right column top paragraphPubMed ID12459775
|| Doval, M. D. & Hansell, D. A. Organic carbon and apparent oxygen utilization in the western South Pacific and the central Indian Oceans. Mar. Chem. 68, 249–264 (2000)  Schlesinger, W. H. Biogeochemistry. An Analysis of Global Change (Academic, San Diego, 1991)
||P.380 left column bottom paragraph: "The consumption of past primary production, stored in the form of the very large (primary sources)(about 685 to 700 Gt C) oceanic DOC pool, potentially allows an uncoupling between primary production and respiration extending over millennia, the mean age of the ocean's DOC pool (ref 42), resulting in a lack of steady-state at shorter timescales."