Dissolved organic radiocarbon in the central Pacific Ocean

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Date
2019-05-02
Author
Druffel, Ellen R. M. 
Griffin, Sheila 
Wang, Ning 
Garcia, Noreen G. 
McNichol, Ann P. 
Key, Robert M. 
Walker, Brett D. 
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Citable URI
https://hdl.handle.net/1912/24353
As published
https://doi.org/10.1029/2019GL083149
DOI
10.1029/2019GL083149
Keyword
 dissolved organic carbon; radiocarbon; Pacific Ocean; dissolved inorganic carbon; deep ocean circulation; AABW 
Abstract
We report marine dissolved organic carbon (DOC) concentrations, and DOC ∆14C and δ13C values in seawater collected from the central Pacific. Surface ∆14C values are low in equatorial and polar regions where upwelling occurs and high in subtropical regions dominated by downwelling. A core feature of these data is that 14C aging of DOC (682 ± 86 14C years) and dissolved inorganic carbon (643 ± 40 14C years) in Antarctic Bottom Water between 54.0°S and 53.5°N are similar. These estimates of aging are minimum values due to mixing with deep waters. We also observe minimum ∆14C values (−550‰ to −570‰) between the depths of 2,000 and 3,500 m in the North Pacific, though the source of the low values cannot be determined at this time.
Description
© The Author(s), 2019. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Druffel, E. R. M., Griffin, S., Wang, N., Garcia, N. G., McNichol, A. P., Key, R. M., & Walker, B. D. Dissolved organic radiocarbon in the central Pacific Ocean. Geophysical Research Letters, 46(10), (2019):5396-5403, doi:10.1029/2019GL083149.
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Suggested Citation
Druffel, E. R. M., Griffin, S., Wang, N., Garcia, N. G., McNichol, A. P., Key, R. M., & Walker, B. D. (2019). Dissolved organic radiocarbon in the central Pacific Ocean. Geophysical Research Letters, 46(10), 5396-5403.