This database presents measurements of total
carbon dioxide (TCO2) and partial pressure of
CO2 (pCO2) taken from discrete water samples
during the Research Vessel (R/V) Akademik
Ioffe Expedition
in the South
Pacific Ocean.
Conducted as
part of the
World Ocean
Circulation
Experiment
(WOCE). The
cruise began in
Montevideo,
Uruguay, on
February 14,
1992, and ended
in Wellington,
New Zealand,
on April 6,
1992. WOCE Section S4P, located along ~67°S
between 73°W and 172°E, was completed
during the 51-day expedition with 113 hydrographic stations occupied.
Hydrographic and chemical measurements made
along WOCE Section S4P included pressure,
temperature, salinity, and oxygen measured by a
conductivity, temperature, and depth sensor; bottle salinity; bottle oxygen; phosphate; nitrate;
nitrite; silicate; TCO2; and pCO2 measured at
4°C.
The TCO2
concentration in
~1290 seawater
samples was
determined with
a coulometric
analysis system;
the pCO2 in
~1273 water
samples was
determined with
an equilibrator-gas chromatograph system. In
addition, 172
coulometric
measurements
for the Certified Reference Material (batch no.
7) were made at sea for 62 bottles and yielded a
mean value of 1927.5 ± 1.8 
mol/kg. This mean
value agrees within one standard deviation of
the 1926.6 ± 0.7 mol/kg (N = 6) value
determined with the manometer of
C. D. Keeling of Scripps Institution of
Oceanography.
The location of hydrographic stations occupied during R/VAkademik Ioffe Expedition along the WOCE Section S4P.
