International oceanographic tables, vol. 2 oxygen solubility in seawater

Postma, H.; Svansson, Artur; Lacombe, H.; Grasshoff, Klaus

doi:10.1016/0011-7471(75)90010-8

Cited by 2 publications

(3 citation statements)

References 8 publications

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“…4 as a (Postma et al 1976) are based on Weiss' results, but Benson and Krause (1980a) can be used for seawater as well as freshwater. Table 9 is a simplified version of their table.…”

Section: Experimental Measurements With Seawatermentioning

confidence: 99%

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

Benson

Krause

1984

Limnology & Oceanography

840

509

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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/p. 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 -+O.l% 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.Benson and Krause (1980a) presented new values for the concentration of oxygen in freshwater in equilibrium with the atmosphere in the temperature range 0" to 40°C. These were based upon very precise and accurate measurements (Benson et al. 1979) of the Henry coefficient, koO, for oxygen The work to be reported here extends the results on oxygen to saline waters. New measurements of the Henry coefficient for oxygen in waters with varying salinity are used to examine the functional dependence of ko,, on salinity S, and to determine the way salting-out varies with temperature. Values are derived for the concentration of oxygen dissolved in freshwater and seawater in equilibrium with the atmosphere as a function of temperature, salinity, and at-

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“…4 as a (Postma et al 1976) are based on Weiss' results, but Benson and Krause (1980a) can be used for seawater as well as freshwater. Table 9 is a simplified version of their table.…”

Section: Experimental Measurements With Seawatermentioning

confidence: 99%

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

Benson

Krause

1984

Limnology & Oceanography

840

509

View full text Add to dashboard Cite

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“…Consequently, the common practice of taking the difference between the total pressure P = 1 atm and the value for P,, read from the steam tables (in atm) probably yields a good approximation for the partial pressure of the remaining gases. Then, again using the definition that the partial pressure of a gas in a mixture is equal to its mole fraction times the pressure of the mixture, we have PO = 0.20946( 1 -P,,), (Postma et al 1976) we have expressed the first set in pg-atoms rather than pmol. For the last set 1 mole of oxygen has been taken to be 31.9988 g.]…”

Section: Po = And(i -E) Nommentioning

confidence: 99%

“…Weiss (197C) used the oxygen data of Carpenter (1956) and Murray and Riley (1969) for both pure water and seawater to fit series of this form in temperature, with additional terms for the effect of salinity, to Bunsen coefficients and various concentration values. Postma et al (1976) In k = a, + (al/T) + (a,lT2) + (a,lT3) + . .…”

mentioning

confidence: 99%

The concentration and isotopic fractionation of gases dissolved in freshwater in equilibrium with the atmosphere. 1. Oxygen

Benson

Krause

1980

Limnology & Oceanography

211

122

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Equations and tables are presented from which accurate values can be obtained, in any of several sets of units, for the concentration of oxygen dissolve11 in freshwater in equilibrium with the atmosphere from 0" to 40°C and 0.5 to 1.1 atm. The y are based on values for the Henry coefficient of oxygen, k,,, which have an estimated accuracy of 0.02%. Equations are derived which relate k, to equilibrium concentrations in natilral waters. The equations include corrections for molecular interactions in the vapor pha.;e. Uncertainty about the best way to correct for these interactions limits the estimated act Iracy of the derived values to about & 0.07% at 0°C and 0.04% at 4O"C, but the new results are much more accurate than values from the UNESCO tables. Within their random errors, previous measurements agree very well with the new results. Under equilibrium conditions, and between 0" and 6O"C, the per mil difference between the 340,:3202 abundance ratio in t le dissolved gas and the air is given by 6 = -0.730 + (427/T), where T is in kelvin and the standard deviation is <0.02%0.

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International oceanographic tables, vol. 2 oxygen solubility in seawater

Cited by 2 publications

References 8 publications

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

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

The concentration and isotopic fractionation of gases dissolved in freshwater in equilibrium with the atmosphere. 1. Oxygen

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