A new experimental technique for validating exchange models of carbon dioxide between the atmosphere and sea-water

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Abstract

The mechanism of CO2-exchange between the atmosphere and sea-water was re-examined by simultaneously measuring pH and pO2 in artificial sea-water exposed to CO2 and air atmospheres. The data were fitted to an exchange model by using both the differential and integral forms of the diffusion equation. It was found that the pH and pO2 data support the assumption that the exchange for these gases is driven by the gradient of the partial pressure of the gas across the imaginary solution-gas boundary layer (the z layer) and is not affected by chemical reaction or hydration rate under the experimental conditions used, viz. 1-100 meq l., alkalinity, pH 4.5-8.3 and z-layer thickness 2-500 μm. It is concluded that the rate of hydration of CO2 plays an insignificant role in the exchange mechanisms between the atmosphere and the oceans.

Original languageEnglish
Pages (from-to)1095-1099
Number of pages5
JournalTalanta
Volume31
Issue number12
DOIs
StatePublished - 1 Jan 1984

ASJC Scopus subject areas

  • Analytical Chemistry

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