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

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Benson, Bruce B., Krause, Daniel·1984·Limnology and Oceanography

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/T2. 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.

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Metadata

Authors
Benson, B. B., & Krause, D.
Venue
Limnology and Oceanography
Publisher
Wiley
Published
1984-05
Volume
29
Issue
3
Pages
620-632
ISSN
  • 0024-3590 (ISSN-L)
  • 1939-5590
OpenAlex
W2068307966
Cited by
1,000
References
0
FWCI
2.96
Type
journal article
Language
en
Open access
bronze

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Benson, B. B., & Krause, D. (1984). The concentration and isotopic fractionation of oxygen dissolved in freshwater and seawater in equilibrium with the atmosphere1. Limnology and Oceanography. https://doi.org/10.4319/lo.1984.29.3.0620

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