We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
A new estimate of ocean oxygen utilization points to a reduced rate of respiration in the ocean interior.
- Authors
Duteil, O.; Koeve, W.; Oschlies, A.; Bianchi, D.; Kriest, I.; Galbraith, E.; Matear, R.
- Abstract
The Apparent Oxygen Utilization (AOU) is a classical measure of the amount of oxygen respired by biological processes in the ocean interior. We show that the AOU systematically overestimates the True Oxygen Utilization (TOU) in 6 coupled circulation- biogeochemical ocean models, due to atmosphere--ocean oxygen disequilibrium in the subduction regions, consistent with prior work. We develop a new approach that we call Evaluated Oxygen Utilization (EOU), which approximates the TOU at least twice as well as AOU in all 6 models, despite large differences in the physical and biological components of the models. Applying the EOU approach to a global observational dataset leads to an estimated biological oxygen consumption rate that is by 25 percent lower than that derived from AOU-based estimates.
- Subjects
BIOGEOCHEMISTRY; SUBDUCTION zones; OXYGEN consumption; SCIENTIFIC observation; OCEAN; PLATE tectonics
- Publication
Biogeosciences Discussions, 2013, Vol 10, Issue 2, p2245
- ISSN
1810-6277
- Publication type
Article
- DOI
10.5194/bgd-10-2245-2013