The isothermal compressibility of seawater near one atmosphere

F. K. Lepple, Frank J Millero

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The isothermal compressibility of artificial seawater has been measured by a piezometric technique from 0 to 40‰ S in 5‰ intervals and from 0 to 40°C in 5° intervals. The measurements were made at 17 bar increments to 34 bars and the data extrapolated to one atmosphere. Compressibility determinations on a Copenhagen seawater sample (∼35‰S) over the same temperature and pressure range yielded results that agreed with the artificial seawater results (within our experimental error of ±0·05 × 10-6 bar-1). The isothermal compressibility results at one atmosphere and 35‰ are in excellent agreement with the values calculated from Wilson's (1960) sound velocity data; however, our results disagree with the P-V-T data of Ekman (1908), Newton and Kennedy (1965) and Wilson and Bradley (1968). The normalized compressibilities of Ekman show excellent agreement with Wilson's and our results. A theoretical equation for the compressibility of seawater as a function of chlorinity has been developed in terms of the apparent equivalent compressibility of the major ionic components of seawater. The theoretically calculated isothermal compressibilities of seawater at 25° agree very well with the experimental results (to within ±0·09 × 10-6 bar-1).

Original languageEnglish (US)
Pages (from-to)1233-1254
Number of pages22
JournalDeep-Sea Research and Oceanographic Abstracts
Volume18
Issue number12
DOIs
StatePublished - 1971
Externally publishedYes

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Compressibility
Seawater
Acoustic wave velocity

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The isothermal compressibility of seawater near one atmosphere. / Lepple, F. K.; Millero, Frank J.

In: Deep-Sea Research and Oceanographic Abstracts, Vol. 18, No. 12, 1971, p. 1233-1254.

Research output: Contribution to journalArticle

Lepple, F. K. ; Millero, Frank J. / The isothermal compressibility of seawater near one atmosphere. In: Deep-Sea Research and Oceanographic Abstracts. 1971 ; Vol. 18, No. 12. pp. 1233-1254.
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