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Povinec, P. P.*; Aoyama, Michio*; Biddulph, D.*; Breier, R.*; Buesseler, K. O.*; Chang, C. C.*; Golser, R.*; Hou, X. L.*; Je
kovsk
, M.*; Jull, A. J. T.*; et al.
Biogeosciences, 10(8), p.5481 - 5496, 2013/08
Times Cited Count：101 Percentile：94.61(Ecology)Radionuclide impact of the Fukushima Dai-ichi Nuclear Power Plant accident on the distribution of radionuclides in seawater of the NW Pacific Ocean is compared with global fallout from atmospheric tests of nuclear weapons. Surface and water column seawater samples collected during the international expedition in June 2011 were analyzed for 
Cs, 
Cs, 
I and 
H. The Cs, I and H levels in surface seawater offshore Fukushima varied between 0.002-3.5 Bq/L, 0.01-0.8 
Bq/L, and 0.05-0.15 Bq/L, respectively. At the sampling site about 40 km from the coast, where all three radionuclides were analyzed, the Fukushima impact on the levels of these three radionuclides represent an increase above the global fallout background by factors of about 1000, 30 and 3, respectively. The water column data indicate that the transport of Fukushima-derived radionuclides downward to the depth of 300 m has already occurred. The observed Cs levels in surface waters and in the water column are in reasonable agreement with predictions obtained from the Ocean General Circulation Model, which indicates that the radionuclides have been transported from the Fukushima coast eastward. Due to a suitable residence time in the ocean, Fukushima-derived radionuclides will provide useful tracers for isotope oceanography studies on the transport of water masses in the NW Pacific Ocean.
I in mediterranean sea waterPham, M. K.*; Betti, M.*; Povinec, P. P.*; Alfimov, V.*; Biddulph, D.*; Gastaud, J.*; Kieser, W. E.*; L
pez, Guti
rrez, J. M.*; Possnert, G.*; Sanchez-Cabeza, J. A.*; et al.
Journal of Radioanalytical and Nuclear Chemistry, 286(1), p.121 - 127, 2010/10
Times Cited Count：14 Percentile：67.77(Chemistry, Analytical)no abstracts in English
Povinec, P. P.*; Aramaki, Takafumi*; Burr, G. S.*; Jull, A. J. T.*; Liong Wee Kwong, L.*; Togawa, Orihiko
Radiocarbon, 46(2), p.583 - 594, 2004/09
Times Cited Count：16 Percentile：32.5(Geochemistry & Geophysics)no abstracts in English
Povinec, P. P.*; Livingston, H. D.*; Shima, Shigeki*; Aoyama, Michio*; Gastaud, J.*; Goroncy, I.*; Hirose, Katsumi*; Huynh-Ngoc, L.*; Ikeuchi, Yoshihiro*; Ito, Toshimichi; et al.
Deep Sea Research Part 2: Topical Studies in Oceanography, 50(17-21), p.2607 - 2637, 2003/09
Times Cited Count：100 Percentile：88.9(Oceanography)An international sampling cruise, IAEA'97, was carried out in 1997 in the NW Pacif1c Ocean. The main results of this study are following: (1) The levels of oceanographic parameter showed differences from the historical data, (2) Transuranics water profiles showed typical sub-surface concentration maxima with decrease in concentration by about a factor of 4 from the historical results, deepening their positions by about a factor of 2 and declining the water column inventory by about 20% over 24 years, (3) Sr-90 and Cs-137 data confirmed that the observed changes in concentration profiles have been resulting from the regional water masses circulation, and (4) The concentrations of these radionuclides in surface water after 40 years of their main introduction to the NW Pacific are still showing a latitudinal dependence. The results present the most comprehensive recent study on the distribution of radionuclides in the NW Pacific Ocean with the implications for behaviour of these radionuclides in the water column and physical forcing of water mass circulation over the last 24 years.
Cs in the world oceanNakano, Masanao; Povinec, P. P.*
Deep Sea Research Part 2: Topical Studies in Oceanography, 50(17-21), p.2803 - 2816, 2003/00
Times Cited Count：30 Percentile：50.64(Oceanography)None
Nakano, Masanao; Povinec, P. P.*
Journal of Environmental Radioactivity, 69, p.85 - 106, 2003/00
Times Cited Count：29 Percentile：52.4(Environmental Sciences)None
Aramaki, Takafumi; Mizushima, Toshihiko; Kuji, Tomoyuki*; Povinec, P. P.*; Togawa, Orihiko
Radiocarbon, 43(2B), p.857 - 867, 2001/03
no abstracts in English
-ray analysis of Gulf marine environmental samplesYonezawa, Chushiro; Matsue, Hideaki; Adachi, Takeo; Hoshi, Michio; Tachikawa, Enzo*; Povinec, P. P.*; S.W.Fowler*; M.S.Baxter*
IAEA-TECDOC-1094, p.344 - 345, 1999/07
no abstracts in English
