Transect Along 24°n Latitude of 14 C in Dissolved Inorganic Carbon in the Subtropical North Atlantic Ocean

The distribution of bomb-produced 14 C in the ocean provides a powerful constraint for circulation models of upper ocean mixing. We report 14 C measurements from an east-west section of the main thermocline at 24°N latitude in the subtropical North Atlantic Ocean in summer 1992, and one profile from the Gulf of Mexico in 1993. Observed gradients reflect the transient invasion of bomb 14 C into the thermocline via mixing along isopycnals from the poleward outcrop, with progressively more sluggish mixing at greater depths. A slight deepening of the profile is observed over the 20-yr period since the GEOSECS survey at one location where the comparison is possible

Climatology · Latitude · North Atlantic Deep Water · Outcrop · Radiocarbon dating · Subtropics · Thermocline · Thermohaline circulation · Transect · Water mass · Geology and Paleoclimatology Research · Isotope Analysis in Ecology · Marine and coastal ecosystems · Geology · Oceanography · Paleontology

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