Oxygen Supersaturation in the Ocean: Biological Versus Physical Contributions

  title={Oxygen Supersaturation in the Ocean: Biological Versus Physical Contributions},
  author={Harmon Craig and Thomas L. Hayward},
  pages={199 - 202}
A method based on measurements of dissolved molecular nitrogen, molecular oxygen, and argon can distingish biological from physical contributions to oxygen supersaturation in the ocean. The derived values of biological O2 production can be used as a check on estimates of total organic productivity measured by instantaneous rates of carbon-14 assimilation. Application to the shallow summer O2 maxima in the North Pacific gyres shows that about 72% of the O2 supersaturation maximum at 28�N and… Expand
Net biological oxygen production in the ocean: Remote in situ measurements of O2 and N2 in surface waters
[1] We describe a method for determining net annual biological oxygen production in the euphotic zone of the ocean using remote in situ measurements of oxygen and nitrogen gas. Temperature, salinity,Expand
Assessment of oceanic productivity with the triple-isotope composition of dissolved oxygen.
An approach for estimating production of photosynthetic oxygen, based on the isotopic composition of dissolved oxygen of seawater, that allows the estimation of integrated oceanic productivity on a time scale of weeks is described. Expand
Biological oxygen production from oxygen-to-argon ratios and oxygen isotopologues in the Atlantic Ocean
Marine primary producers play an important role in controlling the atmospheric carbon dioxide through photosynthesis and export of organic matter into the deep ocean. In this thesis I used twoExpand
Net biological oxygen production in the ocean—II: Remote in situ measurements of O2 and N2 in subarctic pacific surface waters
Abstract Net community biological production in the euphotic zone of the ocean fuels organic matter and oxygen export from the upper ocean, which has a large influence on the atmospheric pressure ofExpand
Chemical tracers of productivity and respiration in the subtropical Pacific Ocean
We determine annual rates of net biological oxygen production in the euphotic zone and respiration in the upper thermocline of the subtropical North Pacific ocean using mass balances of oxygen,Expand
Physical and biological controls on oxygen saturation variability in the upper Arctic Ocean
Employing continuous in situ measurements of dissolved O2/Ar and O2 in the Arctic Ocean, we investigate the mechanisms controlling the physical (abiotic) and biological oxygen saturation stateExpand
The shallow oxygen maximum in the tropical Atlantic Ocean (Guinea Dome Area): Physical or biological origin?
The Guinea Dome area (12°N, 22°W) is characterized by a summertime O2 maximum which lies at the top of the thermocline. The vertical distributions of molecular nitrogen and argon are used to discussExpand
Triple oxygen isotopes and oxygen/argon ratio measurements to enhance coastal and open ocean production/respiration comparisons
The accurate measurement of marine plankton production is required to constrain the global carbon balance. Traditional methods rely on bottle incubations, which are thought to underestimate planktonExpand
O2, Ar, N2, and 222Rn in surface waters of the subarctic Ocean: Net biological O2 production
Distributions of oxygen, argon, nitrogen, and radon in the upper ocean of the subarctic Pacific distinguish the fluxes controlling the oxygen mass balance during the summers of 1987 and 1988. TheExpand
Continuous measurements of dissolved O2 and oxygen isotopes in the Southern California coastal ocean
Abstract Dissolved O 2 /N 2 , O 2 /Ar, O 2 saturation and δ 18 O were measured continuously near the surface ocean at the Scripps Institution of Oceanography pier in La Jolla, California, for fiveExpand


Biogenic fluxes of carbon and oxygen in the ocean
Rates of oxygen utilization (OUR) at depth in the ocean have been interpreted as showing that rates of carbon fixation by phytoplankton, as estimated by 14CO2 assimilation in vitro, must be inExpand
Primary productivity in the central North Pacific: comparison of oxygen and carbon fluxes
Abstract A re-examination of published data on oxygen and carbon fluxes in the pelagic zone of the central North Pacific Ocean does not support the hypothesis that inferred oxygen evolution isExpand
Aquatic Primary Productivity and the 14C-CO2 Method: A History of the Productivity Problem
Recent appraisals of the primary productivity of the biosphere have concluded that in spite of their vast area, the total annual net production of lakes and oceans is only about one half of theExpand
The Pacific shallow oxygen maximum, deep chlorophyll maximum, and primary productivity, reconsidered
Productivity estimated from oxygen accumulation is much greater than the primary productivity measured by the 14 C method, suggesting that the 14C method substantially underestimates true productivity not only in high and low latitudes but generally. Expand
Dissolved gas saturation anomalies and excess helium in the ocean H. Craig and R.F. Weiss, Earth Planet. Sci. Letters 10 (1971) 289-296
Abstract New solubility measurements have been made for helium and neon in seawater; the results (published elsewhere) show that neon is actually supersaturated in the ocean, rather than generallyExpand
A modified technique for the Winkler determination of dissolved oxygen has been used at the Chesapeake Bay Institute for several years. The modifications result in increased simplicity and speed andExpand
Environmental heterogeneity and plankton community structure in the central North Pacific
Compares aux autres systemes pelagiques, ceux du Pacifique Nord central presentent une heterogeneite relativement faible, specialement sur les mesoechelles, ce qui suggere que les perturbations lieesExpand
Are the Ocean's Deserts Blooming?
  • R. Kerr
  • Environmental Science, Medicine
  • Science
  • 1983