Dissolved organic radiocarbon in the central Pacific Ocean
Date
2019-05-02Author
Druffel, Ellen R. M.
Concept link
Griffin, Sheila
Concept link
Wang, Ning
Concept link
Garcia, Noreen G.
Concept link
McNichol, Ann P.
Concept link
Key, Robert M.
Concept link
Walker, Brett D.
Concept link
Metadata
Show full item recordCitable URI
https://hdl.handle.net/1912/24353As published
https://doi.org/10.1029/2019GL083149DOI
10.1029/2019GL083149Keyword
dissolved organic carbon; radiocarbon; Pacific Ocean; dissolved inorganic carbon; deep ocean circulation; AABWAbstract
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.
Collections
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.Related items
Showing items related by title, author, creator and subject.
-
Radiocarbon content of dissolved organic carbon in the South Indian Ocean
Bercovici, Sarah K.; McNichol, Ann P.; Xu, Li; Hansell, Dennis A. (John Wiley & Sons, 2018-01-24)We report four profiles of the radiocarbon content of dissolved organic carbon (DOC) spanning the South Indian Ocean (SIO), ranging from the Polar Front (56°S) to the subtropics (29°S). Surface waters held mean DOC Δ14C ... -
Dissolved organic radiocarbon in the eastern Pacific and Southern Oceans
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. (American Geophysical Union, 2021-05-24)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 ... -
Constraining the sources and cycling of dissolved organic carbon in a large oligotrophic lake using radiocarbon analyses
Zigah, Prosper; Minor, Elizabeth C.; McNichol, Ann P.; Xu, Li; Werne, Josef P. (2017-03)We measured the concentrations and isotopic compositions of solid phase extracted (SPE) dissolved organic carbon (DOC) and high molecular weight (HMW) DOC and their constituent organic components in order to better ...