Hydrochemistry measured on water bottle samples during METEOR cruise M60/5, supplement to: Tanhua, Toste; Wallace, Douglas WR (2005): Consistency of TTO-NAS inorganic carbon data with modern measurements. Geophysical Research Letters, 32, L14618

Toste Tanhua & Douglas WR Wallace
We compare alkalinity and total dissolved inorganic carbon (DIC) measurements made during the Transient Tracers in the Ocean, North Atlantic Study (TTO-NAS) in 1981 with modern measurements from a TTO reoccupation cruise in 2004 (M60/5). We find that the TTO-NAS alkalinity values are 3.6 ± 2.3 µmol/kg higher than modern alkalinity data tied to Certified Reference Materials. The TTO-NAS DIC values re-calculated from original alkalinity and discrete-pCO2 data using currently accepted constants are 3.8 µmol/kg...
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