Dissolved organic radiocarbon in the central Pacific Ocean
Dissolved organic radiocarbon in the central Pacific Ocean
Date
2019-05-02
Authors
Druffel, Ellen R. M.
Griffin, Sheila
Wang, Ning
Garcia, Noreen G.
McNichol, Ann P.
Key, Robert M.
Walker, Brett D.
Griffin, Sheila
Wang, Ning
Garcia, Noreen G.
McNichol, Ann P.
Key, Robert M.
Walker, Brett D.
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DOI
10.1029/2019GL083149
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Keywords
Dissolved organic carbon
Radiocarbon
Pacific Ocean
Dissolved inorganic carbon
Deep ocean circulation
AABW
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.
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© 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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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.