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 post-bomb origin and that the ¹⁴C age of pre-bomb DOC is >4900 ¹⁴C yr, ~900 ¹⁴...

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Bibliographic Details
Main Authors: Druffel, Ellen R M, Griffin, Sheila, Coppola, Alysha I, Walker, Brett D
Format: Article in Journal/Newspaper
Language:English
Published: American Geophysical Union 2016
Subjects:
Institute of Geography
910 Geography & travel
Southern Ocean
North Atlantic
Online Access:https://www.zora.uzh.ch/id/eprint/124082/
https://www.zora.uzh.ch/id/eprint/124082/1/2016_Druffel%20et%20al.,%202016Atlantic%20DOC%20.pdf
https://www.zora.uzh.ch/id/eprint/124082/2/2016_Druffel_Supp.%20Info.%20GRL%20Atl.pdf
https://doi.org/10.5167/uzh-124082
https://doi.org/10.1002/2016GL068746
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 post-bomb origin and that the ¹⁴C age of pre-bomb DOC is >4900 ¹⁴C yr, ~900 ¹⁴C yr 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 DOC ¹⁴C ages are older and a portion of deep DOC is more dynamic than previously reported.

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