Dissolved organic radiocarbon in the eastern Pacific and Southern Oceans

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Date
2021-05-24
Author
Druffel, Ellen R. M. 
Griffin, Sheila 
Lewis, Christian B. 
Rudresh, Megha 
Garcia, Noreen G. 
Key, Robert M. 
McNichol, Ann P. 
Hauksson, Niels E. 
Walker, Brett D. 
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Citable URI
https://hdl.handle.net/1912/27523
As published
https://doi.org/10.1029/2021GL092904
DOI
10.1029/2021GL092904
Keyword
 13C; carbon cycle; circumpolar deep water; dissolved inorganic carbon; dissolved organic carbon; radiocarbon 
Abstract
We report marine dissolved organic carbon (DOC) concentrations, and DOC Δ14C and δ13C values in seawater collected from the Southern Ocean and eastern Pacific GOSHIP cruise P18 in 2016/2017. The aging of 14C in DOC in circumpolar deep water northward from 69°S to 20°N was similar to that measured in dissolved inorganic carbon in the same samples, indicating that the transport of deep waters northward is the primary control of 14C in DIC and DOC. Low DOC ∆14C and δ13C measurements between 1,200 and 3,400 m depth may be evidence of a source of DOC produced in nearby hydrothermal ridge systems (East Pacific Rise).
Description
Author Posting. © American Geophysical Union, 2021. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 48(10), (2021): e2021GL092904, https://doi.org/10.1029/2021GL092904.
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Suggested Citation
Druffel, E. R. M., Griffin, S., Lewis, C. B., Rudresh, M., Garcia, N. G., Key, R. M., McNichol, A. P., Hauksson, N. E., & Walker, B. D. (2021). Dissolved organic radiocarbon in the eastern Pacific and Southern Oceans. Geophysical Research Letters, 48(10), e2021GL092904.