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Dissolved Organic Radiocarbon in the Eastern Pacific and Southern Oceans
Author(s) -
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.
Publication year - 2021
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2021gl092904
Subject(s) - dissolved organic carbon , oceanography , seawater , radiocarbon dating , geology , circumpolar deep water , ridge , total organic carbon , deep sea , pacific ocean , deep water , environmental science , environmental chemistry , north atlantic deep water , chemistry , paleontology
We report marine dissolved organic carbon (DOC) concentrations, and DOC Δ 14 C and δ 13 C values in seawater collected from the Southern Ocean and eastern Pacific GOSHIP cruise P18 in 2016/2017. The aging of 14 C 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 14 C in DIC and DOC. Low DOC ∆ 14 C and δ 13 C 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).