| Summary: | This data documentation discusses the procedures and methods used to measure total carbon dioxide (TCO2) and the fugacity of CO2 (fCO2) at hydrographic stations during the R/V Meteor oceanographic cruise 28/1 in the South Atlantic Ocean (Section A8). Conducted as part of the World Ocean Circulation Experiment (WOCE), the cruise began in Recife, Brazil, on March 29, 1994, and ended after 35 days at sea in Walvis Bay, Namibia, on May 12, 1994. Instructions for accessing the data are provided. TCO2 was measured using two single-operator multiparameter metabolic analyzers (SOMMA) coupled to a coulometer for extracting and detecting CO2 from seawater samples. The overall precision and accuracy of the analyses was +/- 1.17 micro-mol/kg. For the second carbonate system parameter, the fCO2 was measured in discrete samples by equilibrating a known volume of liquid phase (seawater) with a known volume of a gas phase containing a known mixture of CO2 in gaseous nitrogen (N2). After equilibration, the gas phase CO2 concentration was determined by flame ionization detection following the catalytic conversion of CO2 to methane (CH4). The precision of these measurements was less than or equal to 1.0%.
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