Hydrothermal-derived black carbon as a source of recalcitrant dissolved organic carbon in the ocean
Yamashita, Y.; Mori, Y.; Ogawa, H. (2023). Hydrothermal-derived black carbon as a source of recalcitrant dissolved organic carbon in the ocean. Science Advances 9(6): eade3807. https://dx.doi.org/10.1126/sciadv.ade3807
In: Science Advances. AAAS: New York. ISSN 2375-2548; e-ISSN 2375-2548, more
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| Authors | | Top |
- Yamashita, Y.
- Mori, Y.
- Ogawa, H.
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| Abstract |
Deep-sea hydrothermal vents are a possible source of thermogenic dissolved black carbon (DBC), which is a component of recalcitrant dissolved organic carbon, but little is known about the distribution of hydrothermal DBC in the deep ocean. Here, we show basin-scale distributions of DBC along two transects in the eastern Pacific Ocean, which are located outside the jet-like hydrothermal plumes from the East Pacific Rise. The DBC concentration in the deep waters did not show a strong linear relationship with apparent oxygen utilization (AOU), as previously observed in the central and western Pacific Ocean. Deviations in DBC concentration from the DBC-AOU relationship observed in the central and western Pacific Ocean were quantified. The deviation was linearly correlated with excess 3He, a tracer for hydrothermal input, indicating that a fraction of the DBC in the deep ocean is transported long distances from hydrothermal systems. |
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