Radiocarbon in dissolved organic carbon of the Atlantic Ocean

Marine dissolved organic carbon (DOC) is produced in the surface ocean though its radiocarbon (14C) age in the deep ocean is thousands of years old. Here we show that ≥10% of the DOC in the deep North Atlantic is of postbomb origin and that the 14C age of the prebomb DOC is ≥4900 14C year, ~900 14C...

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Bibliographic Details
Main Authors: Druffel, ERM, Griffin, S, Coppola, AI, Walker, BD
Format: Article in Journal/Newspaper
Language:unknown
Published: eScholarship, University of California 2016
Subjects:
Meteorology & Atmospheric Sciences
Southern Ocean
North Atlantic
Online Access:https://escholarship.org/uc/item/0wt2k6cr
Description
Summary:Marine dissolved organic carbon (DOC) is produced in the surface ocean though its radiocarbon (14C) age in the deep ocean is thousands of years old. Here we show that ≥10% of the DOC in the deep North Atlantic is of postbomb origin and that the 14C age of the prebomb DOC is ≥4900 14C year, ~900 14C year older than previous estimates. We report 14C ages of DOC in the deep South Atlantic that are intermediate between values in the North Atlantic and the Southern Ocean. Finally, we conclude that prebomb DOC 14C ages are older and a portion of deep DOC is more dynamic than previously reported.

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