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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.

Journal Articles

The Present condition of a tandetron AMS in JAERI-Mutsu

Kitamura, Toshikatsu; Aramaki, Takafumi; Mizutani, Yoshihiko*; Togawa, Orihiko; Mizushima, Toshihiko; Kabuto, Shoji*; Sudo, Kazuhiko*

JAERI-Conf 2000-019, p.26 - 29, 2001/02

no abstracts in English

Journal Articles

JAEA Reports

None

PNC-TJ1564 95-001, 171 Pages, 1995/03

PNC-TJ1564-95-001.pdf:5.35MB

None

Oral presentation

Generation processes of methane and carbon dioxide at deep underground of Horonobe area, Hokkaido, Japan

Miyakawa, Kazuya; Mizuno, Takashi; Hirota, Akinari*; Komatsu, Daisuke*; Tsunogai, Urumu*

no journal, , 

no abstracts in English

Oral presentation

Research on the effects of microbial methane oxidation on drill-core head-space gas analysis

Miyakawa, Kazuya; Okumura, Fumiaki*

no journal, , 

no abstracts in English

Oral presentation

The Role of low-temperature organic matter diagenesis in carbonate precipitation within a marine deposit

Miyakawa, Kazuya; Ishii, Eiichi

no journal, , 

no abstracts in English

7 (Records 1-7 displayed on this page)
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