Preliminary data report for the INDIVAT 1 and INDIGO 1/INDIVAT 3 cruises in the Indian Ocean

The objectives are to quantify the oceanic penetration of excess CO2 by using carbonate data directly and thereby to understand more fully the oceanic carbon cycle. This investigation of the carbonate chemistry of the Indian Ocean has the following specific goals: (1) to obtain the first winter carbonate data in the South Indian Ocean, which is near the major point of origin for the bottom waters in the world oceans; (2) to evaluate seasonal and cross-frontal (Subtropical and Antarctic Front) variations of carbonate chemistry; (3) to estimate the penetration depth of the excess, anthropogenic CO2 in the Indian Ocean based on both carbonate and transient tracer data; and (4) to compare the results with data reported in the literature. This report presents the experimental data and a limited preliminary analysis from the first two of a series of cruises scheduled in the Indian Ocean between 1984 and 1987. 19 refs., 25 figs.