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EFFECT OF TEMPERATURE ON THE p H OF SEAWATER 1
Author(s) -
Gieskes Joris M.
Publication year - 1969
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1969.14.5.0679
Subject(s) - alkalinity , seawater , carbonate , bicarbonate , chemistry , carbonate ion , mineralogy , analytical chemistry (journal) , environmental chemistry , geology , oceanography , organic chemistry
The temperature coefficient of the p II of seawater, calculated from existing data on the carbonate system in seawater, is confirmed experimentally as +0.0114 p H units per degree Celsius at 1 atm pressure. Although pH measurements with a given system are reproducible to ±0.005 or ±0.000 p H units, direct p H measurements on seawater are accurate only to about ±0.02 p II units; hence computations of components of the carbonate system are uncertain by 1% in bicarbonate and 5% in carbonate. These uncertainties can be halved if p H values are derived from precise determination of other components of the carbonate system, such as alkalinity and total CO 2 .