The concentration and isotopic fractionation of oxygen dissolved in freshwater and seawater in equilibrium with the atmosphere1

1984/05/01 by Bruce B. Benson, Daniel Krause · 8 citations
Earth and Planetary Sciences · Chemical Engineering · #Groundwater and Isotope Geochemistry #Marine and coastal ecosystems #Analytical Chemistry and Sensors

paper · pdf · doi:10.4319/lo.1984.29.3.0620

Abstract

Previous work on the solubility of oxygen in freshwater has been extended to seawater. Measurements of the Henry coefficient in the ranges 0° < t < 45° C and 0< S < 50 fit the Setschenow relationship for the variation with salinity. The temperature dependence of the Setschenow coefficient for oxygen is found to be K = 0.0225034 ‒ 13.6083/ T + 2,565.68/ T 2 . The equation for the Henry coefficient as a function of temperature and salinity is used to calculate values for unit standard atmospheric concentrations (USAC) in freshwater and seawater in equilibrium with air at a total pressure of 1 atmosphere. It is estimated that the possible error in the new USAC values is no greater than ±0.1% and probably less. Tables and equations are presented for obtaining accurate USAC values in the ranges 0° < t < 40°C and 0 < S < 40. Simple procedures are given for calculating standard atmospheric concentrations at pressures different from 1 atm. The presence of sea salt has a negligible effect on the fractionation of the oxygen isotopes during solution.

Cited by

• Acute temperature effects on cilia beating increase coral deoxygenation
• Water mass-driven variations in primary production and bacterial respiration during the spring bloom in the Fram Strait
• Divergent oxygen trends in ice-covered lakes driven by ice-cover decline and ecological memory
• Mixotrophy emerges as an optimal strategy in mature waters of the Amazon River plume
• Inter-annual and spatial variations of air-sea CO2 fluxes and acidification mechanism in the coastal waters of Qingdao, China during 2011–2019
• The Dole Effect and its variations during the last 130,000 years as measured in the Vostok Ice Core
• Hydrodynamic and primary production effects on seasonal DO variability in the Danube River
• Thermal adaptations in deep-sea hydrothermal vent and shallow-water shrimp

Related

• The geologic history of seawater oxygen isotopes from marine iron oxides
• Oxygen supply in aquatic ectotherms: Partial pressure and solubility together explain biodiversity and size patterns
• Measurement of the diffusion coefficients of sparingly soluble gases in water
• Carbon monoxide in seawater (Atlantic Ocean)
• The Solubility of Carbon Dioxide in Water at Low Pressure