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...

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Bibliographic Details
Published in:Radiocarbon
Main Authors: Severinghaus, Jeffrey P., Broecker, Wallace S., Peng, Tsung-Hung, Bonani, Georges
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press (CUP) 1996
Subjects:
General Earth and Planetary Sciences
Archeology
North Atlantic
Online Access:http://dx.doi.org/10.1017/s0033822200030058
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033822200030058
Description
Summary: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.

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