Abstract
On March 11, 2011 tsunami caused a heavy damage to the Fukushima Nuclear Power Plant (FNPP). In this chapter we apply the Lagrangian approach to simulate propagation of Fukushima-derived radionuclides advected by altimetric velocity field in the North Western Pacific. The results of simulation are compared with in situ measurements of levels of134Cs and137Cs concentrations. In the first section we focus on simulation just after the accident and in situ measurements in research vessel cruises in June and July 2011 (Kaeriyama et al. Biogeosciences 10(2):4287–4295, 2013; Buesseler et al., Proc Natl Acad Sci 109(16):5984–5988, 2012). Backward-in-time Lagrangian techniques are used to find out the origin and pathways of water samples with measured high levels of radioactivity. The altimetry-based simulation provides the evidence of near-surface transport of radioactive contamination across the Kuroshio Extension jet just after the accident due to pinching off rings from the jet. In the second section we present the results of in situ measurements of134Cs and137Cs at different depths in a broad area in June and July 2012. It was found that 15 month after the incident concentrations of radiocesium in the Japan and Okhotsk seas were at background or slightly increased level, while they had increased values in the subarctic frontal area east off Japan. The highest concentrations have been found to exceed ten times the background levels before the accident. Maximal content of radiocesium was observed within subsurface and intermediate water layers inside the cores of mesoscale ACEs. Convergence and subduction of surface water inside eddies are main reasons of downward transport of radionuclides. Different Lagrangian diagnostics are used to reconstruct the pathways and origin of synthetic tracers imitating measured seawater samples collected in each of those eddies. The results of observations are consistent with the simulated results. It is shown that the tracers, simulating water samples with increased radioactivity measured in the cruise, really visited the areas with presumably high level of contamination. Fast water advection between ACEs and convergence of surface water inside eddies make them responsible for spreading, accumulation, and downward transport of cesium rich water to the intermediate depth in the frontal zone.
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References
Andrade-Canto, F., Sheinbaum, J., Zavala Sansón, L.: A Lagrangian approach to the loop current eddy separation. Nonlinear Process. Geophys. 20 (1), 85–96 (2013). 10.5194/npg-20-85-2013
Aoyama, M., Uematsu, M., Tsumune, D., Hamajima, Y.: Surface pathway of radioactive plume of TEPCO Fukushima NPP1 released134Cs and137Cs. Biogeosciences 10 (5), 3067–3078 (2013). 10.5194/bg-10-3067-2013
Bandong, B.B., Volpe, A.M., Esser, B.K., Bianchini, G.M.: Pre-concentration and measurement of low levels of gamma-ray emitting radioisotopes in coastal waters. Appl. Radiat. Isot. 55 (5), 653–665 (2001). 10.1016/s0969-8043(01)00081-1
Behrens, E., Schwarzkopf, F.U., Lübbecke, J.F., Büning, C.W.: Model simulations on the long-term dispersal of137Cs released into the Pacific Ocean off Fukushima. Environ. Res. Lett. 7 (3), 034004 (2012). 10.1088/1748-9326/7/3/034004
Budyansky, M.V., Goryachev, V.A., Kaplunenko, D.D., Lobanov, V.B., Prants, S.V., Sergeev, A.F., Shlyk, N.V., Uleysky, M.Y.: Role of mesoscale eddies in transport of Fukushima-derived cesium isotopes in the ocean. Deep-Sea Res. I Oceanogr. Res. Pap. 96, 15–27 (2015). 10.1016/j.dsr.2014.09.007
Buesseler, K.O., Jayne, S.R., Fisher, N.S., Rypina, I.I., Baumann, H., Baumann, Z., Breier, C.F., Douglass, E.M., George, J., Macdonald, A.M., Miyamoto, H., Nishikawa, J., Pike, S.M., Yoshida, S.: Fukushima-derived radionuclides in the ocean and biota off Japan. Proc. Natl. Acad. Sci. 109 (16), 5984–5988 (2012). 10.1073/pnas.1120794109
Bulatov, N.V., Lobanov, V.B.: Influence of the Kuroshio warm-core rings on hydrographic and fishery conditions off Southern Kuril Islands. In: Proceedings of the PORSEC-92 in Okinawa, pp. 1127–1131 (1992)
Dietze, H., Kriest, I.:137Cs off Fukushima Dai-ichi, Japan — model based estimates of dilution and fate. Ocean Sci. 8 (3), 319–332 (2012). 10.5194/os-8-319-2012
Ebuchi, N., Hanawa, K.: Trajectory of mesoscale eddies in the Kuroshio recirculation region. J. Oceanogr. 57 (4), 471–480 (2001). 10.1023/A:1021293822277
Honda, M.C., Aono, T., Aoyama, M., Hamajima, Y., Kawakami, H., Kitamura, M., Masumoto, Y., Miyazawa, Y., Takigawa, M., Saino, T.: Dispersion of artificial caesium-134 and -137 in the western North Pacific one month after the Fukushima accident. Geochem. J. 46 (1), e1–e9 (2012)
Inoue, M., Kofuji, H., Hamajima, Y., Nagao, S., Yoshida, K., Yamamoto, M.:134Cs and137Cs activities in coastal seawater along Northern Sanriku and Tsugaru Strait, northeastern Japan, after Fukushima Dai-ichi nuclear power plant accident. J. Environ. Radioact. 111, 116–119 (2012). 10.1016/j.jenvrad.2011.09.012
Inoue, M., Kofuji, H., Nagao, S., Yamamoto, M., Hamajima, Y., Yoshida, K., Fujimoto, K., Takada, T., Isoda, Y.: Lateral variation of134Cs and137Cs concentrations in surface seawater in and around the Japan Sea after the Fukushima Dai-ichi nuclear power plant accident. J. Environ. Radioact. 109, 45–51 (2012). 10.1016/j.jenvrad.2012.01.004
Itoh, S., Yasuda, I.: Characteristics of mesoscale eddies in the Kuroshio–Oyashio Extension region detected from the distribution of the sea surface height anomaly. J. Phys. Oceanogr. 40 (5), 1018–1034 (2010). 10.1175/2009JPO4265.1
Itoh, S., Yasuda, I.: Water mass structure of warm and cold anticyclonic eddies in the western boundary region of the Subarctic North Pacific. J. Phys. Oceanogr. 40 (12), 2624–2642 (2010). 10.1175/2010jpo4475.1
Kaeriyama, H., Ambe, D., Shimizu, Y., Fujimoto, K., Ono, T., Yonezaki, S., Kato, Y., Matsunaga, H., Minami, H., Nakatsuka, S., Watanabe, T.: Direct observation of134Cs and137Cs in surface seawater in the western and central North Pacific after the Fukushima Dai-ichi nuclear power plant accident. Biogeosciences 10 (2), 4287–4295 (2013). 10.5194/bg-10-4287-2013
Kaeriyama, H., Shimizu, Y., Ambe, D., Masujima, M., Shigenobu, Y., Fujimoto, K., Ono, T., Nishiuchi, K., Taneda, T., Kurogi, H., Setou, T., Sugisaki, H., Ichikawa, T., Hidaka, K., Hiroe, Y., Kusaka, A., Kodama, T., Kuriyama, M., Morita, H., Nakata, K., Morinaga, K., Morita, T., Watanabe, T.: Southwest intrusion of134Cs and137Cs derived from the Fukushima Dai-ichi nuclear power plant accident in the western North Pacific. Environ. Sci. Technol. 48 (6), 3120–3127 (2014). 10.1021/es403686v
Kameník, J., Dulaiova, H., Buesseler, K.O., Pike, S.M., Št’astná, K.: Cesium-134 and 137 activities in the central North Pacific Ocean after the Fukushima Dai-ichi nuclear power plant accident. Biogeosciences 10 (9), 6045–6052 (2013). 10.5194/bg-10-6045-2013
Kanda, J.: Continuing137Cs release to the sea from the Fukushima Dai-ichi nuclear power plant through 2012. Biogeosciences 10 (9), 6107–6113 (2013). 10.5194/bg-10-6107-2013
Karasev, E.V.: Monitoring of ecological conditions of the Far East seas. In: Proceedings of the 2nd International Meeting of Amur-Okhotsk consortium, pp. 75–80. Amur-Okhotsk Consortium (2012). http://amurokhotsk.com/wp-content/uploads/2012/04/Proceedings.pdf
Kawai, H.: Hydrography of the Kuroshio Extension. In: Stommel, H.M., Yoshida, K. (eds.) Kuroshio: physical aspects of the Japan current, pp. 235–352. University of Washington Press, Seattle (1972)
Kitano, K.: Some properties of the warm eddies generated in the confluence zone of the Kuroshio and Oyashio currents. J. Phys. Oceanogr. 5 (2), 245–352 (1975). 10.1175/1520-0485(1975)005¡0245:SPOTWE¿2.0.CO;2
Kumamoto, Y., Aoyama, M., Hamajima, Y., Aono, T., Kouketsu, S., Murata, A., Kawano, T.: Southward spreading of the Fukushima-derived radiocesium across the Kuroshio extension in the North Pacific. Sci. Rep. 4, 1–9 (2014). 10.1038/srep04276
Kuznetsov, L., Toner, M., Kirwan Jr., A.D., Jones, C.K.R.T., Kantha, L.H., Choi, J.: The loop current and adjacent rings delineated by Lagrangian analysis of the near-surface flow. J. Mar. Res. 60 (3), 405–429 (2002). 10.1357/002224002762231151
Lobanov, V.B., Rogachev, K.A., Bulatov, N.V., Lomakin, A.F., Tolmachev, K.P.: Long-term evolution of the Kuroshio warm eddy. Dokl. USSR Akad. Sci. 317 (4), 984–988 (1991). [in Russian]
Maderich, V., Bezhenar, R., Heling, R., de With, G., Jung, K.T., Myoung, J.G., Cho, Y.K., Qiao, F., Robertson, L.: Regional long-term model of radioactivity dispersion and fate in the Northwestern Pacific and adjacent seas: application to the Fukushima Dai-ichi accident. J. Environ. Radioact. 131, 4–18 (2014). 10.1016/j.jenvrad.2013.09.009
Mendoza, C., Mancho, A.M.: The Lagrangian description of aperiodic flows: a case study of the Kuroshio current. Nonlinear Process. Geophys. 19 (4), 449–472 (2012). 10.5194/npg-19-449-2012
Mendoza, C., Mancho, A.M., Rio, M.H.: The turnstile mechanism across the Kuroshio current: analysis of dynamics in altimeter velocity fields. Nonlinear Process. Geophys. 17 (2), 103–111 (2010). 10.5194/npg-17-103-2010
Miyazawa, Y., Masumoto, Y., Varlamov, S.M., Miyama, T., Takigawa, M., Honda, M., Saino, T.: Inverse estimation of source parameters of oceanic radioactivity dispersion models associated with the Fukushima accident. Biogeosciences 10 (4), 2349–2363 (2013). 10.5194/bg-10-2349-2013
Nakano, M., Povinec, P.P.: Long-term simulations of the137Cs dispersion from the Fukushima accident in the world ocean. J. Environ. Radioact. 111, 109–115 (2012). 10.1016/j.jenvrad.2011.12.001
Nakata, K., Sugisaki, H. (eds.): Impacts of the Fukushima Nuclear Accident on Fish and Fishing Grounds. Springer, Tokyo (2015). 10.1007/978-4-431-55537-7
Oikawa, S., Takata, H., Watabe, T., Misonoo, J., Kusakabe, M.: Distribution of the Fukushima-derived radionuclides in seawater in the Pacific off the coast of Miyagi, Fukushima, and Ibaraki prefectures, Japan. Biogeosciences 10 (7), 5031–5047 (2013). 10.5194/bg-10-5031-2013
Povinec, P.P., Hirose, K., Aoyama, M.: Fukushima Accident: Radioactivity Impact on the Environment. Elsevier, Amsterdam (2013). 10.1016/B978-0-12-408132-1.01001-9
Prants, S.V., Budyansky, M.V., Ponomarev, V.I., Uleysky, M.Y.: Lagrangian study of transport and mixing in a mesoscale eddy street. Ocean Model. 38 (1–2), 114–125 (2011). 10.1016/j.ocemod.2011.02.008
Prants, S.V., Uleysky, M.Y., Budyansky, M.V.: Numerical simulation of propagation of radioactive pollution in the ocean from the Fukushima Dai-ichi nuclear power plant. Dokl. Earth Sci. 439 (2), 1179–1182 (2011). 10.1134/S1028334X11080277
Qiu, B., Chen, S.: Variability of the Kuroshio extension jet, recirculation gyre, and mesoscale eddies on decadal time scales. J. Phys. Oceanogr. 35 (11), 2090–2103 (2005). 10.1175/JPO2807.1
Remez, V.P.: The application of caesium selective sorbents in the remediation and restoration of radioactive contaminated sites. In: Luykx, F., Frissel, M. (eds.) Radioecology and the Restoration of Radioactive-Contaminated Sites. NATO ASI Series, vol. 13, pp. 217–224. Springer, Dordrecht (1996). 10.1007/978-94-009-0301-2_17
Remez, V.P., Sapozhnikov, Y.A.: The rapid determination of caesium radionuclides in water systems using composite sorbents. Appl. Radiat. Isot. 47 (9–10), 885–886 (1996). 10.1016/s0969-8043(96)00080-2
Rossi, V., Sebille, E.V., Gupta, A.S., Garçon, V., England, M.H.: Multi-decadal projections of surface and interior pathways of the Fukushima Cesium-137 radioactive plume. Deep-Sea Res. I Oceanogr. Res. Pap. 80, 37–46 (2013). 10.1016/j.dsr.2013.05.015
Rypina, I.I., Jayne, S.R., Yoshida, S., Macdonald, A.M., Douglass, E., Buesseler, K.: Short-term dispersal of Fukushima-derived radionuclides off Japan: modeling efforts and model-data intercomparison. Biogeosciences 10 (7), 4973–4990 (2013). 10.5194/bg-10-4973-2013
Sugimoto, S., Hanawa, K.: Relationship between the path of the Kuroshio in the south of Japan and the path of the Kuroshio extension in the east. J. Oceanogr. 68 (1), 219–225 (2012). 10.1007/s10872-011-0089-1
Tomosada, A.: Generation and decay of Kuroshio warm-core rings. Deep Sea Res. Part A 33 (11–12), 1475–1486 (1986). 10.1016/0198-0149(86)90063-4
Tsumune, D., Tsubono, T., Aoyama, M., Hirose, K.: Distribution of oceanic137Cs from the Fukushima Dai-ichi nuclear power plant simulated numerically by a regional ocean model. J. Environ. Radioact. 111, 100–108 (2012). 10.1016/j.jenvrad.2011.10.007
Tsumune, D., Tsubono, T., Aoyama, M., Uematsu, M., Misumi, K., Maeda, Y., Yoshida, Y., Hayami, H.: One-year, regional-scale simulation of137Cs radioactivity in the ocean following the Fukushima Dai-ichi nuclear power plant accident. Biogeosciences 10 (8), 5601–5617 (2013). 10.5194/bg-10-5601-2013
Waseda, T.: On the Eddy-Kuroshio interaction: Meander formation process. J. Geophys. Res. Oceans 108 (C7), 3220 (2003). 10.1029/2002JC001583
Yasuda, I., Okuda, K., Hirai, M.: Evolution of a Kuroshio warm-core ring — variability of the hydrographic structure. Deep Sea Res. Part A 39 (Supplement 1), S131–S161 (1992). 10.1016/s0198-0149(11)80009-9
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Prants, S.V., Uleysky, M.Y., Budyansky, M.V. (2017). Fukushima-Derived Cesium Isotopes in the North Western Pacific: Direct Observation and Altimetry-Based Simulation of Propagation. In: Lagrangian Oceanography. Physics of Earth and Space Environments. Springer, Cham. https://doi.org/10.1007/978-3-319-53022-2_7
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