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Radiocarbon in dissolved organic carbon of the Atlantic Ocean


Druffel, Ellen R M; Griffin, Sheila; Coppola, Alysha I; Walker, Brett D (2016). Radiocarbon in dissolved organic carbon of the Atlantic Ocean. Geophysical Research Letters, 43(10):5279-5286.

Abstract

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.

Abstract

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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Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Geography
Dewey Decimal Classification:910 Geography & travel
Language:English
Date:16 May 2016
Deposited On:24 May 2016 17:18
Last Modified:02 Feb 2018 10:00
Publisher:American Geophysical Union
ISSN:0094-8276
Additional Information:Copyright 2016 American Geophysical Union
OA Status:Green
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1002/2016GL068746

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