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Concentration of O2 (oxygen) in suboxic region in ocean

Value	<= µM Range: <~2 to 4 µM
Organism	Biosphere
Reference	L. A. Codispoti, An oceanic fixed nitrogen sink exceeding 400 TgNa-1 vs the concept of homeostasis in the fixed-nitrogen inventory, Biogeosciences, 4, 233–253, 2007 p.234 right column bottom paragraph
Comments	"Denitrification becomes a prominent metabolic process when oxygen concentrations become vanishingly small. Three major quasi-permanent sites for water column denitrification exist within suboxic (O2<~2–4µM) portions of the thermocline in the Arabian Sea, the Eastern Tropical North Pacific (ETNP) and the Eastern Tropical South Pacific (ETSP)." The regions containing the largest volumes of water in the suboxic zone occur in the northern Arabian Sea, the Eastern Tropical North Pacific and the Eastern Tropical South Pacific (e.g. Deutsch et al., 2004).
Entered by	Uri M
ID	104781