Large fluxes of continental-shelf-borne dissolved organic carbon in the East China Sea and the Yellow Sea

Han, Heejun; Na, Taehee; Cho, Hyung‐Mi; Kim, Guebuem; Hwang, Jeomshik

doi:10.1016/j.marchem.2022.104097

Cited by 7 publications

(4 citation statements)

References 71 publications

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“…The DOC originated from the Yellow River and the Yangtze River are generally old (300–1,700 14 C years) and have low δ 13 C values (−32.2‰ to −21.0‰) (Wang et al., 2012, 2016). However, the riverine DOC appears to be degraded quickly and its influence is confined within the close proximity of the mouths of these rivers (Han et al., 2022). The δ 13 C values of DOC in the East China Sea (mean = −21.1 ± 1.1‰, n = 21; Han et al., 2022), and the East Sea (−20.4 to −21.7‰; T. H. Kim et al., 2015) indicate a dominant marine source of DOC.…”

Section: Resultsmentioning

confidence: 99%

“…However, the riverine DOC appears to be degraded quickly and its influence is confined within the close proximity of the mouths of these rivers (Han et al., 2022). The δ 13 C values of DOC in the East China Sea (mean = −21.1 ± 1.1‰, n = 21; Han et al., 2022), and the East Sea (−20.4 to −21.7‰; T. H. Kim et al., 2015) indicate a dominant marine source of DOC. Therefore, the influence of riverine DOC is likely small.…”

Section: Resultsmentioning

confidence: 99%

“…The DOC originated from the Yellow River and the Yangtze River are generally old (300-1,700 14 C years) and have low δ 13 C values (−32.2‰ to −21.0‰) (Wang et al, 2012(Wang et al, , 2016. However, the riverine DOC appears to be degraded quickly and its influence is confined within the close proximity of the mouths of these rivers (Han et al, 2022) (Druffel & Griffin, 2015;Druffel et al, 2018Druffel et al, , 2019Druffel et al, , 2021, and Southern Ocean (Druffel et al, 2021). The regression line in (c), shown as a black line, with gray shading representing the 95% confidence interval, is derived from the East Sea (Japan Sea) data only.…”

Section: Concentrations and δ 14 C Values Of Doc In The East Seamentioning

confidence: 99%

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Transport of Aged Dissolved Organic Carbon via the Surface Current Revealed by Radiocarbon

Ryu,

Han,

et al. 2023

Geophysical Research Letters

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The East Sea (also known as the Japan Sea) is connected to the Northwest Pacific via shallow straits and has independent deep water circulation, as a model miniature ocean. The radiocarbon age of dissolved organic carbon (DOC) in the East Sea ranged from 2,000 to 3,700 years, exceeding the water turnover time (∼100 years). The oldest DOC was found in the subsurface layer characterized by the Tsushima Warm Water. Comparison of the radiocarbon content and concentration of DOC in the East Sea to those in the ocean suggests that aged DOC was transported conservatively from the Northwest Pacific to the East Sea via the shallow Tsushima Warm Current. The fractions of DOC released by serial‐oxidation of the oldest DOC sample had identical radiocarbon ages, implying that refractory DOC was produced in situ and added to the DOC pool in the East Sea.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Concentrations and δ 14 C Values Of Doc In The East Seamentioning

confidence: 99%

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Transport of Aged Dissolved Organic Carbon via the Surface Current Revealed by Radiocarbon

Ryu,

Han,

et al. 2023

Geophysical Research Letters

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“…This means that the external inputs have a significant impact on the marginal seas. Vigorous biogeochemical alterations occur in the YS and the ECS, which compose one of the largest continental shelves in the world (Kim et al, 2018;Cho et al, 2019;Han et al, 2022). These shelf waters eventually influence the euphotic zone of the EJS and the adjacent Pacific Ocean.…”

Section: Introductionmentioning

confidence: 99%