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Ito, Toshimichi; Otosaka, Shigeyoshi; Suzuki, Takashi; Tanaka, Takayuki; Tsuneyama, Teppei; Togawa, Orihiko
JAEA-Data/Code 2007-008, 41 Pages, 2007/03
JAEA-Data-Code-2007-008.pdf:3.11MB
The database for the Japan Sea parameters on marine environment and radionuclides (JASPER) is established by the Japan Atomic Energy Agency as one of the final products of the Japan Sea Expeditions (phase I) carried out covering the EEZs of Japan and Russian Federation. And now, the part for anthropogenic radionuclides in the JASPER database is opened to the public, prior to the release of succeeding parts including other radionuclides, chemical tracers and oceanographic parameters. In the present, 253 data records are stored in the database including 193 data for 
Sr and 
Cs, 163 data for 
Pu and 236 data for 
Pu obtained from seawater, seabed sediment and filtered particle with support data. By establishing the database, recent feature of the Japan Sea environment has been recorded using every possible parameter for us. We believe that this database might be a strong tool for the purposes of monitoring for contamination of the Japan Sea by anthropogenic radionuclides, study of material transport in the sea and development and validation of models for numerical simulations. Furthermore, it is being prepared that the database are linked to MARIS of IAEA-MEL in order to contribute the world-wide study and monitoring of anthropogenic radionuclides in marine environment.
Tsuneyama, Teppei; Ito, Toshimichi; Otosaka, Shigeyoshi
Proceedings of International Symposium on Environmental Modeling and Radioecology, p.236 - 239, 2007/03
The purpose of this study is to investigate the balance of the radionuclides in the Japan Sea by examining the all available data. In order to investigate the balance of the radionuclides in the Japan Sea, we examine the temporal changes of existing, incoming and outgoing amounts. The incoming amount is estimated as the sum of the amounts supplied from the atmosphere by global fallout and from the East China Sea by the Tsushima Warm Current. The outgoing amount is estimated as the sum of the amounts discharged from the Japan Sea and to seabed sediment. The existing amount is estimated by integrating the inventories over a whole surface of the Japan Sea. So, the temporal change of inventories must be elucidated in examining the temporal change of the existing amount. From the result, it is suggested that the rapid vertical transport exists in the Japan Sea as well as the slow transport. In our presentation, the balance of the radionuclides in seawater of the Japan Sea will be elucidated.
Tsuneyama, Teppei; Ito, Toshimichi; Otosaka, Shigeyoshi
no journal, ,
no abstracts in English
Ito, Toshimichi; Tsuneyama, Teppei; Otosaka, Shigeyoshi
no journal, ,
no abstracts in English