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Journal Articles

$$delta^{13}$$C and $$delta^{15}$$N values of sediment-trap particles in the Japan and Yamato Basins and comparison with the core-top values in the East/Japan Sea

Khim, B.-K.*; Otosaka, Shigeyoshi; Park, K.-A.*; Noriki, Shinichiro*

Ocean Science Journal, 53(1), p.17 - 29, 2018/03

 Times Cited Count:1 Percentile:79(Marine & Freshwater Biology)

Distribution of carbon and nitrogen stable isotope ratios ($$delta$$$$^{13}$$C, $$delta$$$$^{15}$$N) in sinking particles collected in four stations in the Japan Sea was summarized. The $$delta$$$$^{13}$$C and $$delta$$$$^{15}$$N values in the sinking particles showed a clear seasonal variation, which agreed well with the variation in the chlorophyll a concentration in the surface seawater and in the sinking flux of biogenic particles. In particular, during the highly productive season of phytoplankton, a remarkable isotopic fractionation of $$delta$$$$^{13}$$N was found in the sinking particles, and it was inferred that the fractionation indicates the degree of nitrogen uptake by diatoms in the surface layer. These results are helpful information for linking the phenomenon in the ocean surface and the isotopic information recorded in the seafloor.

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