Immediately after recovery of the Niskin bottles water was sampled in 100 ml sample vessels. 0.2 ml of mercury chloride solution was added to each sample in order to prevent further bacterial activity. The samples were then sealed and stored for later land-based analyses. Carbon and oxygen isotope analyses of water and DIC will be performed at the Leibniz Institute for Age Dating in Kiel (H. Erlenkeuser).
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