Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Orihiko Togawa"'
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 294:563-567
To investigate the migration of anthropogenic 129I in the environment, we measured 129I concentrations at both subarctic (above 40oN) and subtropical (below 40oN) circulations in the surface seawater of the Japan Sea. The averaged concentrations of s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::34764946f77dce2df762c3d069a5045a
https://doi.org/10.1016/j.nimb.2012.08.035
https://doi.org/10.1016/j.nimb.2012.08.035
Autor:
Teiji In, Shigeki Shima, Tomoharu Nakayama, Orihiko Togawa, Yoichi Ishikawa, Hideyuki Kawamura, Takuya Kobayashi, Toshiyuki Awaji
Publikováno v:
Progress in Nuclear Science and Technology. 2:682-687
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3c22edbe57cd72e6cbed7c2d95000e76
https://doi.org/10.15669/pnst.2.682
https://doi.org/10.15669/pnst.2.682
Autor:
Toshimichi Ito, Shigeyoshi Otosaka, Naoki Hirose, Takuya Kobayashi, Orihiko Togawa, Hideyuki Kawamura
Publikováno v:
Journal of Oceanography. 66:649-662
A numerical experiment is carried out to reproduce distribution of concentration of 90Sr and 137Cs, estimate their total amount and verify their source in the Japan Sea. Model results are in good agreement with observational findings in the Japan Sea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::72a0f64a4229caa55192af3d0673f38a
https://doi.org/10.1007/s10872-010-0053-5
https://doi.org/10.1007/s10872-010-0053-5
Publikováno v:
Journal of Nuclear Science and Technology. 46:289-294
We developed an extraction method for accurately and reproducibly determining dissolved organic radiocarbon in seawater by ultraviolet oxidation of dissolved organic carbon and subsequent accelerator mass spectrometry. We determined the irradiation t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::28e284ce449e085e9c21e7cc410e0519
https://doi.org/10.1080/18811248.2007.9711532
https://doi.org/10.1080/18811248.2007.9711532
Autor:
Orihiko Togawa, Shigeyoshi Otosaka, Eugeny Karasev, Masayuki Minakawa, Takayuki Tanaka, Shinichiro Noriki, Hikaru Amano
Publikováno v:
Journal of Oceanography. 64:911-923
⋅ Carbon cycle, ⋅ organic carbon, ⋅ Japan Sea, ⋅ lateral transport, ⋅ vertical transport, ⋅ radiocarbon, ⋅ accelerator mass spectrometry (AMS)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a817a19746671e5353a143a7720555ed
https://doi.org/10.1007/s10872-008-0075-4
https://doi.org/10.1007/s10872-008-0075-4
Publikováno v:
Quaternary Geochronology. 3:268-275
The concentrations of 129I in seawater samples from two sites (off Sekine and the Toyama Bay) in the Japan Sea were determined by accelerator mass spectrometry. The observed concentrations exceed amounts expected from natural origin and globally dist
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b752d4ff95c13673337a07b742fd705f
https://doi.org/10.1016/j.quageo.2007.12.004
https://doi.org/10.1016/j.quageo.2007.12.004
Autor:
Kiminori Shitashima, Shuichi Watanabe, Takafumi Aramaki, Yuichiro Kumamoto, Masatoshi Morita, Orihiko Togawa, Minoru Yoneda, Yasuyuki Shibata
Publikováno v:
Journal of Oceanography. 64:429-441
In 1995 and 2000, the radiocarbon ratio (Δ14C) of total dissolved inorganic carbon was measured in the Japan Sea where deep and bottom waters are formed within the sea itself. We found that (1) since 1979, the Δ14C in bottom water below about 2000-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1614b2a48963a4497eb10217ccf453f9
https://doi.org/10.1007/s10872-008-0036-y
https://doi.org/10.1007/s10872-008-0036-y
Autor:
Takuya Kobayashi, Yoichi Ishikawa, Orihiko Togawa, Teiji In, Shigeki Shima, Hideyuki Kawamura, Yasutaka Matsuura, Toshiyuki Awaji, Tomoharu Nakayama
Publikováno v:
Transactions of the Atomic Energy Society of Japan. 7:112-126
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::90630599a8b1eb82c30c88bd4aeca4e4
https://doi.org/10.3327/taesj.j07.025
https://doi.org/10.3327/taesj.j07.025
Publikováno v:
Journal of Nuclear Science and Technology. 44:238-247
A numerical simulation model system that consists of an ocean current model, Princeton Ocean Model (POM), and a particle random-walk model, SEA-GEARN, has been developed to describe the migration behavior of non-conservative radionuclides in a shallo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ddfaa22c1f1a7d1014425a87b2085330
https://doi.org/10.1080/18811248.2007.9711278
https://doi.org/10.1080/18811248.2007.9711278
Autor:
Orihiko Togawa, Shigeyoshi Otosaka, Tomoharu Senjyu, Hikaru Amano, Takashi Suzuki, Toshikatsu Kitamura, Takafumi Aramaki, Yuri N. Volkov
Publikováno v:
Radiocarbon. 49:915-924
Radiocarbon concentrations in the northernmost region of the Japan Sea were observed during the summer of 2002. The averaged surface δ14C (above 100 m depth) was 52 ± 8%, which is significantly higher compared with the values of the Pacific Ocean a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ebf61a191141208450400348d5392900
https://doi.org/10.1017/s0033822200042788
https://doi.org/10.1017/s0033822200042788